Shanghai Huabang Industrial Business Network - High voltage load switch

[Outdoor high-voltage load switch]SPG-12,24,35KV series outdoor column mounted SF6 insulated load switch

2026-6-19 20:02:04

SPG-12,24,35KV series outdoor pole mounted SF6 insulated load switch

SPG gas insulated load switches are used for overhead lines with voltage levels of 12KV, 24KV, and 35KV. Used for breaking the load current of power lines and closing the fault current of power lines.
The SPG load switch is a series of products classified as manual operation type, electric operation type, and intelligent type.
The switch uses SF6 as the insulation and arc extinguishing medium, utilizing the Puffing arc extinguishing principle and a simple toggle mechanism, with a simple structure and high reliability.

Characteristics of SPG-12,24,35KV series outdoor pole mounted SF6 insulated load switch

1. Stainless steel shell, oil-free, maintenance free: SF6 gas insulation and arc extinguishing are used, with an annual leakage rate of less than 0.1% and a maintenance free period of 30 years
2 Long lifespan: Made of arc extinguishing material with funnel cover and plum blossom contact, it has an extremely short arc extinguishing time
3 High performance: breaking 630A rated current 400 times, short-circuit closing 16KA current 4 times, rated power frequency withstand voltage 60KV, cable charging breaking current: 25A, transformer rated electromagnetic breaking current 22A
The motor spring torque operating mechanism for fast closing and quick opening is remotely and locally operated through communication from the control box. The motor drive power is provided by an energy storage capacitor and can also be manually operated using a hook rod.
5 ceramic sleeves and silicone rubber sleeves are optional, with a creepage distance of up to 48mm/1kV
6. Easy installation: single column installation.

[Outdoor high-voltage load switch]FZW-27.5/D1250-20 outdoor high-voltage AC vacuum load switch

2026-6-19 20:01:55

FZW �� -27.5/D1250-20 outdoor high-voltage AC vacuum load switch isolation switch combination device (hereinafter referred to as the combination device), single-phase column structure, novel structure, with obvious visible fracture, using an operating mechanism to drive the vacuum arc extinguishing chamber, has a large breaking capacity, no arc when breaking and closing current, no fire or explosion hazard, can be operated quickly and frequently, long electrical life, maintenance free and other characteristics.
Combination electrical equipment is a single-phase AC 50Hz, rated voltage 27.5kV single pole outdoor high-voltage switchgear (at an altitude of 2000 meters), widely used in electrified railways for breaking load current, no-load transformers, cable current, capacitor current, and short-circuit fault current.
Scope of application and main technical parameters
The load isolation switch is installed on an outdoor pole and must be able to open and close the normal load current of the line, and integrate the function of the isolation switch to form a visible break. This negative tea isolation switch can be installed in power supply areas such as locomotive depots, partition pavilions, turnaround sections, and station yards, replacing the installation of isolation switches on columns and eliminating the need for circuit breakers specifically designed to cut off normal load currents.

(1) The rated parameters are as follows:
Rated voltage: 27.5kV
Rated current: 1250A
Rated frequency: 50Hz
Rated active load breaking current: 1250
One minute power frequency withstand voltage: 95kV
Isolation fracture distance: �� 400mm
Dynamic stable current: 31.5kA
Thermal stability current: 12.5kA
Rated short-circuit closing current: 12.5kA

(2) Overall layout (as shown in the diagram)
The arc extinguishing chamber is installed on the static contact at the incoming line end, and is connected in parallel with the main electrical circuit - the static contact when in the closed position, ensuring that the switch has strong overload bearing capacity and reliable conductivity (equivalent to a closed isolation switch at this time). The isolation fracture is connected with an isolation knife. The driving force of the arc extinguishing chamber is a fast mechanism, and the isolation knife action drives the conductive fork on the fast mechanism to store energy for the fast mechanism. The conductive fork also plays a role in conducting current during the transient process of closing and opening. In order to enable the isolation knife to move quickly, a passing spring is installed on the three-axis of the isolation knife to ensure that the isolation knife can move quickly when it rotates to a certain angle during the opening and closing process.

(3) Action principle (as shown in the diagram)
When the switch is in the closed state, current flows in from the static contact and divides into two paths. One path flows through the vacuum arc extinguishing chamber - conductive fork to the isolation knife (this path has extremely low current), and the other path flows directly from the static contact to the isolation knife, and then flows out from the isolation knife to the output board.
Breaking process: The spindle rotates under the drive of the electric mechanism, and the isolation knife rotates upward through the insulating operating rod. The isolation knife disengages from the static contact, and all the current flows through the vacuum arc extinguishing chamber - the conductive fork. The isolation knife edge does not shake, and the isolation knife drives the conductive fork to continue moving upward. When it reaches a certain angle (43 °), the fork triggers the fast mechanism inside the body, driving the vacuum arc extinguishing chamber to quickly break the current, and the circuit is in an open circuit state. The pulley and conductive fork on the final isolation knife are separated in a non negative state, forming a clear visible isolation fracture and completing the disconnection operation.
The action sequence of the closing process of the switch is opposite to that of the opening process.
When in the closed position, due to the much smaller resistance in the circuit between the isolation blade and the static contact compared to the circuit composed of the fork and the arc extinguishing chamber, the current mainly flows through the circuit composed of the static contact head of the isolation blade. In the normal powered state, the current passing through the temperature rise calibration arc extinguishing chamber circuit in the isolation blade switch state is very small, so this product has reliable electrical performance and outstanding load-bearing capacity.
Transportation, acceptance, and storage
a�� Dynamic transmission: The load switch of the container must not be flipped, inverted, or subjected to strong vibrations during transportation and loading/unloading.
b�� Acceptance: (1) Carefully remove the load switch to prevent damage to the insulation components;
(2) Check the nameplate data of the load switch, whether the product certificate matches the model, and check whether the documents are missing according to the packing list.
c�� Storage: (1) If the load switch needs to be stored, it should be rotated and stored indoors in a dry and ventilated place for a period of ten years.

Precautions
a�� When transporting or hoisting this product, external forces must not be applied to the insulated porcelain pillars at the inlet and outlet ends, otherwise it will cause the insulated porcelain pillars to break, resulting in the product being unusable. In dynamic transmission, there must be no strong vibration rolling phenomenon, and the switch should be effectively grounded during installation.
b�� After installation, use an electric operating mechanism to perform opening and closing operations on the switch for more than 20 times. There should be no improper opening during the opening process, and the isolation fracture should be greater than 400mm. The arc pull rod should be completely detached from the static end contact without any connectors.

FZW-27.5/D1250-20 Outdoor High Voltage AC Vacuum Load Switch

[Outdoor high-voltage load switch]FZW28Z-12 outdoor boundary vacuum load switch

2026-6-19 20:01:47

FZW28Z-12 Outdoor Boundary Vacuum Load Switch

[Outdoor high-voltage load switch]FZW-12/630A Outdoor AC High Voltage Vacuum Load Switch

2026-6-19 20:01:37

The FZW-12/630A outdoor AC high-voltage vacuum load switch is developed based on national standards such as GB3804.1-90 "3-63kV AC high-voltage load switch" and GB1985-89 "AC high-voltage isolating switch and grounding switch", absorbing the characteristics of similar foreign products and combining with China's national conditions, under the guidance of industry experts. This product can disconnect rated current, close short-circuit current, and has obvious disconnection points, load disconnection, and very reliable power isolation performance. It can be equipped with a manual mechanism or an electric mechanism (the electric mechanism also has manual function), which can be operated locally or remotely.

2�� Usage conditions of FZW-12/630A outdoor AC high-voltage vacuum load switch
1. Altitude not exceeding 1000m;
2. Surrounding air temperature: upper limit+40 degrees, lower limit -40 degrees
3. Wind pressure not exceeding 700Pa
4. Earthquake intensity not exceeding 8 degrees
5. Ice thickness not exceeding 4mm
6. Not suitable for places with flammable, explosive, chemical corrosion, and severe vibration
7. Pollution level of post insulators: ordinary type is level 0, and pollution resistant type is required according to requirements

3�� Main characteristics of switches
1. The structure of the switch is to add a vacuum arc extinguishing device on the basis of the isolation switch, so it not only has the function of a load switch, but also has the function of an isolation switch.
2. The speed of opening and closing the switch during the process is ensured by the fast mechanism in the arc extinguishing device, so the opening and closing are
The speed is not affected by manual or electric motor operation speed.
3. The overall structure of the switch is simple, and the key arc extinguishing device is an integral structure that is easy to replace.
4. Can be operated frequently with almost no maintenance.
5. It can be electric, manual, near control, remote control, and wireless remote control.

4�� FZW-12/630A Outdoor AC High Voltage Vacuum Load Switch Technical Parameters:

serial number	Project	unit	Parameters
one	rated voltage	kV	twelve
two	Power frequency withstand voltage phase/fracture	kV	50/58
three	Lightning impulse withstand voltage phase/fracture	kV	75/90
four	Rated breaking load current	A	630A
five	Rated breaking cable charging current	A	10A
six	Peak rated short-circuit closing current	kA	twenty
seven	Rated dynamic stable current	kA	thirty-one point five
eight	Rated dynamic stability current 4s	kA	twelve point five

5�� Random files and ordering instructions
1. The random files include one copy of the switch manual, one copy of the product certificate, and one copy of the packing list.
2. Please specify the product model, rated voltage, operating mechanism model, and number of auxiliary switch poles when placing an order.

[Outdoor high-voltage load switch]FZW28F-12 series outdoor boundary vacuum load switch

2026-6-19 20:01:28

The FZW28F-12 series outdoor boundary vacuum load switch is suitable for outdoor three-phase AC distribution systems with a rated voltage of 12kV and a rated frequency of 50Hz. It is used for opening and closing load currents and closing short-circuit currents.
Suitable for substations, industrial and mining enterprises, as well as urban and rural power grid protection cities, agricultural power grid automation distribution networks, and places with frequent operations.

The FZW28F-12 series outdoor boundary vacuum load switch consists of two main parts: the FZW28-12 vacuum load switch and the controller, which are electrically connected through aviation sockets and outdoor sealed control cables. It can reliably determine the zero sequence current and phase to phase breaking current of milliampere inside and outside the detection boundary, and is suitable for distribution systems with different neutral grounding methods.

[Outdoor high-voltage load switch]FZW28-12 Outdoor High Voltage User Boundary Load Switch

2026-6-19 20:01:19

The FZW28-12 (FFK) type 12KV outdoor high-voltage user boundary load switch is an automatic isolation protection system device with intelligent control, commonly known as the watchdog negative (FZW28-12F), abbreviated as FFK.

FZW28-12 outdoor high-voltage user boundary load switch is suitable for single grounding protection of branch line users of 12KV outdoor AC overhead distribution branch lines. It is suitable for neutral point ungrounded and neutral point grounded through inductance
A 12KV, 50Hz three-phase distribution network with ground and neutral points grounded through a small resistor. The fault definition of the FFK load switch on the incoming and outgoing sides, where the incoming side fault load switch does not trip; The unidirectional grounding fault load switch on the outgoing side tripped before the higher-level equipment; After the overcurrent fault load switch on the output side trips with the higher-level equipment, the fault section is isolated after the higher-level equipment recloses. This not only determines the scope of the fault, but also ensures the normal operation of non faulty lines, which is of great significance for improving power supply reliability.

FZW28-12 Outdoor High Voltage User Boundary Load Switch

[Outdoor high-voltage load switch]FKW18A-12/T630 Outdoor high-voltage load switch

2026-6-19 20:01:10

The FKW18A-12/T630-16 outdoor AC high-voltage load switch is mainly composed of an isolation switch, an arc extinguishing chamber, and a spring operated mechanism. The arc chamber is made of insulation material with excellent electrical performance, arc resistance, high temperature resistance, and high strength. It is equipped with a fast spring mechanism to ensure that the breaking of load current is not affected by the speed of operation.
The load switch adopts a self-designed spring operated mechanism (national patent application number: 99219074 · 6), which stores energy in the spring through a manual linkage operating mechanism. The load switch is opened and closed by relying on the energy stored in the spring. The switch opening and closing operation is stable, reliable and not affected by human factors, and can be locked in the opening and closing position. There is a visible fracture after the switch is opened, which provides isolation and protection.

The FKW18A-12/T630 outdoor high-voltage load switch is installed on an outdoor pole and can be installed in various ways such as horizontal, vertical, and triangular, making it convenient for outdoor wiring.

[Outdoor high-voltage load switch]FKW17-12/630 Outdoor AC High Voltage Load Switch

2026-6-19 20:01:02

FKW17-12/630 outdoor AC high-voltage load switch is suitable for three-phase AC 50Hz, rated voltage 10kV outdoor distribution systems. It is used for breaking and closing load currents, as well as for breaking and closing no-load lines and no-load transformer currents.
This load switch is equipped with a dedicated manual electric dual-purpose operating mechanism, as well as connecting rods, couplings, universal ball hinges, supports, and other installation accessories.
Product Features

FKW17-12/630 outdoor load switch, consisting of isolation knife switch and arc extinguishing chamber; The isolation knife switch structure adopts a horizontal rotation method, mainly composed of components such as chassis, bracket, insulator, isolation knife plate, etc; The arc extinguishing chamber is made of insulation materials with excellent electrical performance, arc resistance, high temperature resistance, and high strength. It is equipped with a fast mechanism to ensure that the current interruption is not affected by the operating speed, and the performance is stable.

The switch is installed on the outdoor column and can be installed horizontally, vertically, and in various other ways. It uses universal ball hinges and couplings to connect the switch with the manual operating mechanism. The operating mechanism can be locked in the open or closed position. There is a clear isolation fracture after the switch is opened.

FKW17-12/630 Outdoor AC High Voltage Load Switch Technical Parameters

serial number	name	unit	parameter
one	rated voltage	kV	twelve
two	rated current	A	six hundred and thirty
three	rated frequency	Hz	fifty
four	Rated short-time withstand current	kA	16��4s��
five	Rated peak withstand current	kA	40 (peak value)
six	Rated short-circuit closing current	kA	40 (peak value)
seven	1-minute power frequency withstand voltage	kV	Interphase and relative to ground 42, isolation fracture 48
eight	Lightning impulse withstand voltage	kV	Interphase and relative ground 75, isolation fracture 85
nine	Rated no-load transformer breaking current		1600kVA transformer no-load current
ten	Rated current breaking times	time	twenty
eleven	mechanical life	time	two thousand
twelve	Net weight	kg	eighty-five
thirteen	Overall dimensions	mm	2050x630x660
fourteen	Outer dimensions of packaging box	mm	3110x690x720

[Outdoor high-voltage load switch]FZW32-12D/T630-20 series outdoor high-voltage isolation vacuum load switch

2026-6-19 20:00:51

Overview

FZW32-12D/T630-20 outdoor high-voltage isolated vacuum load switch is a new generation of high-voltage electrical product developed by our company with the introduction of technology from Xi'an High Voltage Electrical Equipment Research Institute. Its technical performance indicators comply with GB3804 and IEC standards, and it is suitable for outdoor 12KV, three-phase AC 50Hz power supply networks.

Main technical parameters of FZW32-12D/T630-20 series outdoor high-voltage isolation vacuum load switch

External dimensions and installation dimensions

[Outdoor high-voltage load switch]FZW-15 Outdoor AC High Voltage Vacuum Load Isolation Switch

2026-6-19 20:00:42

I. Overview
The FZW-15 outdoor AC high voltage vacuum load isolation switch is developed based on national standards such as GB3804.1-90 "3-63kV AC high voltage load switch" and GB1985-89 "AC high voltage isolation switch and grounding switch", absorbing the characteristics of similar foreign products and combining with China's national conditions under the guidance of industry experts. This product can disconnect rated current, close short-circuit current, and has obvious disconnection points, load disconnection, and very reliable power isolation performance. It can be equipped with a manual mechanism or an electric mechanism (the electric mechanism also has manual function), which can be operated locally or remotely.

2�� Usage conditions
1. Altitude not exceeding 1000m;
2. Surrounding air temperature: upper limit+40 degrees, lower limit -40 degrees
3. Wind pressure not exceeding 700Pa
4. Earthquake intensity not exceeding 8 degrees
6. Ice thickness not exceeding 4mm
7. Not suitable for places with flammable, explosive, chemical corrosion, and severe vibration
8. Pollution level of post insulators: ordinary type is level 0, and pollution resistant type is required according to requirements

3�� Main characteristics of switches
1. The structure of the switch is to add a vacuum arc extinguishing device on the basis of the isolation switch, so it not only has the function of a load switch, but also has the function of an isolation switch.
2. The speed of opening and closing the switch during the process is ensured by the fast mechanism in the arc extinguishing device, so the opening and closing are
The speed is not affected by manual or electric motor operation speed.
3. The overall structure of the switch is simple, and the key arc extinguishing device is an integral structure that is easy to replace.
4. Can be operated frequently with almost no maintenance.
5. It can be electric, manual, near control, remote control, and wireless remote control.

4�� Standards followed
The technical specifications of FZW-15 outdoor AC high-voltage vacuum load isolation switch comply with the national standard GB3804.1-xx, the shared technical requirements of 3-36kV AC high-voltage load switch and GB/T11022-1999 high-voltage switchgear and control equipment standards.

5�� 1. Switch model and meaning

2. Use environment and conditions
a. The ambient air temperature is within ± 40 ��;
b. Pollution level: Creepage distance �� 900mm
c. Altitude not exceeding 3000 meters;
d. The wind pressure shall not exceed 700Pa (equivalent to a wind speed of 34 meters per second);
e. Condensation can occur during periods of high humidity when the temperature drops sharply;
f. Places without fire, explosion, or chemical corrosion;
g. There are no frequent severe vibrations, and the seismic intensity does not exceed 8 degrees.

6�� Main technical data of FZW-15 outdoor AC high-voltage vacuum load isolation switch

serial number	project	unit	parameter
one	rated voltage	kV	fifteen
two	rated current	A	one thousand two hundred and fifty
three	Power frequency withstand voltage (1 minute)
	Vacuum arc extinguishing chamber fracture (before and after electrical life)	kV	fifty
	Alternating and relative (dry test)	kV	ninety-five
	(Wet test)	kV	eighty-five
	Isolation fracture (dry test)	kV	one hundred and ten
	(Wet test)	kV	ninety-five
four	Lightning impulse withstand voltage
	Alternating and relative to each other	kV	one hundred and eighty-five
	isolation gap	kV	two hundred and fifteen
five	Rated short-circuit closing current (peak)	kA	thirty-one point five
six	The number of times the current is turned on and off	time	forty-two
seven	Rated dynamic stability current (peak value)	kA	eighty
eight	4-second thermal stability current (effective value)	kA	thirty-one point five
nine	Rated cable charging breaking current	A	ten
ten	mechanical life	time	ten thousand

Main mechanical characteristics of load isolation switch

serial number	project	unit	parameter
one	contact gap	mm	14±1
two	Contact overtravel	mm	2±0.5
three	Three phase opening and closing are not synchronized	ms	��5
four	DC resistance of each phase circuit	�̦�	��160
five	Opening time	s	8±2
six	Closing time	s	8±2

7�� Main structure and working principle
The three-phase system is installed on the same chassis through pillar insulators, mainly consisting of a vacuum arc extinguishing chamber, chassis parts, insulators, main electrical circuit parts, transmission parts, etc. The base part is welded with steel sections and the surface is hot-dip galvanized; The main electrical circuit consists of a main contact, an arc contact, a contact seat, and a conductive plate. All made from electrolytic copper processing, with a special anti-corrosion treatment on the surface; The transmission part consists of a transmission shaft, an insulation rod, a connecting arm, etc. Except for the insulation rod which is made of electric porcelain, the rest are hot-dip galvanized bodies; The vacuum arc extinguishing chamber consists of a vacuum chamber bubble, an arc contact (fork shaped contact), and a quick mechanism. The lower part of the vacuum arc extinguishing chamber is fixedly connected to the switch static contact side, and the fork shaped contact is fixed to the upper part of the vacuum arc extinguishing chamber in a movable axis manner.
1. Dimensions of FZW-15 Outdoor AC High Voltage Vacuum Load Switch (Click to View)
2. The main electrical circuit is shown in the figure: middle contact of vacuum load isolation switch (630A-1250A)

1. Right outlet board 2. Contact spring 3. Main control board 4. Arc contact 5. Left outlet board
Characteristic description:
The material of the left and right outlet boards is T2 copper, which has been sealed and treated with anti-oxidation treatment, and the surface is silver plated
Surface Brightening Treatment of 1Cr18Ni9Ti Stainless Steel for 2 Springs
The contact area is a circular arc "line contact" structure, with uniform contact pressure and good self-cleaning performance. It operates frequently for a long time and is safe and reliable.

8�� Working principle
The operating mechanism transmits the operating force to the load isolation switch body through the crank arm, and the load isolation switch body rotates through the transmission shaft of the chassis to open and close the load isolation switch. When the load isolation switch is closed, the moving contact first contacts the arc contact (fork shaped contact) and then rotates to drive the fast mechanism inside the vacuum arc extinguishing chamber to quickly close the vacuum chamber bubble (at this time, the moving and stationary contacts of the main circuit of the switch are not in contact). The circuit current is connected, and after continuing to rotate a certain angle, the moving and stationary contacts contact, and the main electrical circuit is connected, completing the closing action. When the switch is opened, the moving contact blade and the stationary contact blade detach, and the current path is from the moving contact blade to the fork shaped contact, the vacuum chamber bubble, and the wiring board. When the vacuum arc extinguishing chamber continues to open to a certain position, the rapid mechanism of the vacuum arc extinguishing chamber acts to extinguish the arc in the vacuum chamber bubble, and the load current is disconnected to complete the opening process. See Figure 7:

9�� Packaging, transportation, and storage
The packaging method is wooden crate, and the mechanism body, accompanying accessories, and documents (product certificate, user manual) are all packaged in one wooden crate. If the product is not installed immediately after arriving at the destination, it must be placed in a rainproof, dry, and ventilated place. If it is stored for a long time, it should be checked regularly.

10�� Random files and ordering instructions
1. The random files include one copy of the switch manual, one copy of the product certificate, and one copy of the packing list.
2. Please specify the product model, rated voltage, operating mechanism model, and number of auxiliary switch poles when placing an order.

[Outdoor high-voltage load switch]FW18-12/T630-16 Outdoor load isolation switch

2026-6-19 20:00:34

FW18-12/T630-16 outdoor load isolation switch is suitable for three-phase AC rated current 630A, 10kV power systems. It is used for breaking and closing load currents, as well as for breaking and closing no-load lines and transformers. It is an advanced and reliable electrical switch backup for outdoor 10kV line terminal protection today.

[Outdoor high-voltage load switch]FZW16-12/630-20 Vacuum load isolation switch

2026-6-19 20:00:24

FZW16-12/630-20 vacuum load isolation switch is mainly used in AC 50Hz, 12kV distribution networks. It can be used as an automatic line sectionalizer to disconnect and close the load current of the agricultural and urban power distribution system with an electric motor mechanism.

Technical characteristics of FZW16-12/630-20 vacuum load isolation switch
The design of the new FZW16-12/630-20 vacuum load isolation switch adopts new materials and technologies to form a three-phase open layout structure, with vacuum arc extinguishing, visible and obvious fractures, imported outdoor epoxy polyester, synthetic rubber insulators, stainless steel chassis, light weight, can be manually or electrically operated, long service life, maintenance free, easy installation and other advantages. It can be used as a sectionalizer.

Usage conditions:
Altitude �� 1000 meters
Environmental temperature ± 40 ��, wind speed �� 34m/s
Places without fire, explosion, and severe vibration
Environmental pollution level lV
Earthquake intensity not exceeding level 8

Main technical parameters of FZW16-12/630-20 vacuum load isolation switch
Rated voltage (kV): 12
Rated current (A): 630
Rated frequency (Hz): 50
1mjn power frequency withstand voltage:
Vacuum fracture (kV): 42
Phase to phase, to ground (kV): 42
Isolation fracture (kV): 50
Lightning impulse withstand voltage:
Phase to phase, to ground (kV): 75
Isolation fracture (kV): 85
Rated short-circuit closing current (kA): 50
Rated short-time withstand current (kA): 20 (4s)
Rated peak withstand current (kA): 50
Mechanical lifespan (times): 10000

[Outdoor high-voltage load switch]FZW35-40.5./J1250-12.5 Outdoor high-voltage vacuum isolation load switch

2026-6-19 20:00:16

FZW35-40.5/J1250-12.5 outdoor AC high-voltage vacuum isolation load switch is suitable for AC 35KV, 50HZ power systems, mainly used for breaking load current (1250A), transformer no-load current, cable current, capacitor current, and closing short-circuit current (31.5), with functions such as breaking, isolating, connecting, and switching. Used in conjunction with fuses as a replacement for circuit breakers for transformer protection, reducing costs, it is an updated product in urban and rural power grid renovation, especially suitable for unmanned substations.

FZW35-40.5/J1250-12.5 Outdoor High Voltage Vacuum Isolation Load Switch Product Features
1. Long lifespan:
The vacuum arc extinguishing chamber of the load switch adopts a fixed type, and only the moving contact end of the arc extinguishing chamber moves when the switch is activated. Similar domestic products adopt the overall action structure of the vacuum arc extinguishing chamber, which greatly increases the service life of this product (more than 10000 times);
2. Low circuit resistance:
When the production port is working normally, the vacuum arc extinguishing chamber is connected in parallel to the main circuit, and the vacuum arc extinguishing chamber of similar new products is connected in series to the main circuit. Compared with parallel and series, the circuit resistance is greatly reduced.
3. Good sealing performance:
The arc extinguishing chamber action mechanism of the product is installed in a sealed aluminum alloy box, effectively preventing the impact of harsh outdoor conditions on the operating components.
4. Strong corrosion resistance:
The electric operating mechanism box of the product adopts a stainless steel shell, and the exposed standard parts are made of stainless steel; The exposed metal parts are treated with hot-dip galvanizing, which enhances the corrosion resistance of the switch.
5. Diversified operational methods;
Not only electric, but also mobile phone operation adopts a pull ring structure, which can be operated by using an insulated pull rod. Specially suitable for pole mounted assembly of circuits without operational power supply.
6. Small size and heavy weight: length X width X height (1700X1400X1200mm); Weight 200kg

[Outdoor high-voltage load switch]FKW18 series outdoor AC high voltage load switch

2026-6-19 20:00:07

The FKW18 series outdoor AC high-voltage load switch consists of an isolation switch, an arc extinguishing chamber, and an operating mechanism. Adopting the principle of gas generation arc extinguishing, it has the advantages of simple structure, low maintenance workload, strong arc extinguishing ability, fracture insulation level and reliability, reaching the advanced level of similar products at home and abroad. The FKW18 series outdoor AC high-voltage load switch is suitable for outdoor three-phase AC power distribution systems with rated voltage of 12KV~40.5KV and rated frequency of 50HZ. It can be used to open and close distribution lines with load, and can also be used to open and close no-load transformers. At the opening position, it can meet the safety distance requirements specified for the isolation switch.

[Outdoor high-voltage load switch]FZW32-40.5 Outdoor high-voltage isolation vacuum load switch

2026-6-19 19:59:58

FZW32-40.5/1250-25 outdoor high-voltage vacuum load switch (hereinafter referred to as load switch) is suitable for rated voltage of 40. 5KV�� In a power supply network with a rated current of 1250A and three-phase AC 50Hz.

FZW32-40.5 Outdoor High Voltage Isolation Vacuum Load Switch Main Technical Parameters

serial number	name	unit	parameter
one	rated voltage	KV	forty point five
two	rated frequency	Hz	fifty
three	rated current	A	one thousand two hundred and fifty
four	Rated Active load breaking current	A	one thousand two hundred and fifty
five	Rated closed-loop breaking current	A	one thousand two hundred and fifty
six	5% rated active load breaking current	A	sixty-two point five
seven	Rated cable charging breaking current	A	twenty-five
eight	1-minute power frequency withstand voltage: vacuum break, same relative ground, isolated break	KV	68/95/110
nine	Lightning impulse withstand voltage: phase to phase ground/isolated ground port	KV	185/215
ten	Rated short-time withstand current (thermal stability)	KA	twenty-five
eleven	Rated short-circuit duration	S	four
twelve	Rated peak withstand current (dynamic stability)	KA	sixty-three
thirteen	Rated short-circuit closing current	KA	sixty-three
fourteen	mechanical life	time	ten thousand
fifteen	Allowable wear thickness of vacuum arc extinguishing chamber contacts	mm	zero point six
sixteen	Manual operating torque	Nm	��300

FZW32-40.5 Outdoor High Voltage Isolation Vacuum Load Switch Outline and Installation Dimensional Drawing

[Outdoor high-voltage load switch]FZW16A outdoor isolation vacuum load switch (manual, electric)

2026-6-19 19:59:40

1�� Purpose and Scope of Application

FZW �� -12/630-20 outdoor AC high-voltage isolation vacuum load switch is an outdoor high-voltage switchgear equipment with three-phase AC 50Hz and rated voltage of 12KV. Suitable for breaking and closing load currents and short-circuit currents in urban or rural distribution systems, equipped with electric mechanisms and controllers, it can be used as a line sectionalizer or automatic sectionalizer. Due to the adoption of a new insulation structure design and vacuum arc extinguishing chamber, this isolated vacuum load switch has a clearly visible isolation fracture after being turned on and off, and also serves as an isolation switch. Due to the use of vacuum arc extinguishing principle, it has the characteristics of large capacity, no filling material, no environmental pollution, no explosion hazard, long electrical life, and maintenance free.

2�� Working principle
1. Normal working state: After the switch is closed, the main flow direction of the load current is: incoming board - isolation contact - outgoing board. The vacuum arc extinguishing chamber completes the closing first, and finally the isolation contact connects to the incoming board, completing the closing.
2. Closing process: The operating mechanism drives the isolation contact to move. The roller first comes into contact with the crank arm contact and rotates it, and then the vacuum arc extinguishing chamber is closed successively. Finally, the isolation contact is connected to the incoming line board, and the closing is completed.
3. Opening process: The operating mechanism drives the isolation contact to first close into the wire board and separate, causing the load current to transfer to the vacuum arc extinguishing chamber. The isolation contact continues to move, causing the vacuum arc extinguishing chamber to open, and then a visible isolation fracture is formed, completing the opening.

3�� Main technical parameters of FZW16A outdoor isolation vacuum load switch (manual, electric)

serial number	project			unit	parameter
one	rated voltage			KV	twelve
two	rated current			A	six hundred and thirty
three	rated insulation level	1-minute power frequency withstand voltage	Alternating and facing the ground	KV	Dry: 42 Wet: 30
			isolation gap		forty-eight
		Lightning impulse withstand voltage (peak value)	Alternating and facing the ground		seventy-five
			isolation gap		eighty-five
four	Rated breaking load current			A	six hundred and thirty
five	Rated short-time withstand current			KA	twenty
six	Rated peak withstand current				fifty
seven	Rated short-circuit current breaking times				fifty
eight	Close rated short-circuit closing current times			time	two
nine	Rated short-circuit duration			S	four
ten	mechanical life			time	one thousand

3�� Ordering Notice
Please specify when placing an order
1. The name, model, rated current, and quantity of the product.
2. Installation method

FZW16A outdoor isolation vacuum load switch (manual, electric) installation size: 600 × 513

[Outdoor high-voltage load switch]FZW20-12/T630A-20 Outdoor AC High Voltage Vacuum Isolation Load Switch

2026-6-19 19:59:32

FZW20-12/T630A-20 outdoor AC high-voltage vacuum isolation load switch, rated voltage of 12KV, rated current of 630A, rated frequency of 50HZ. It can disconnect and close load current, as well as disconnect transformer no-load current, capacitance current of fixed distance overhead lines, cable lines, and capacitor banks. It has functions such as segmentation, isolation, connection, switching, and protection, and is suitable for overhead distribution lines in urban and rural networks, railways, petrochemicals, etc. It should be noted that this product has the ability to interrupt short-circuit current.
This product is the latest patented product developed by our company and the first of its kind in the country. Its characteristics are: �� using a vacuum arc extinguishing chamber, no fire or explosion hazard, and no maintenance required; �� There is a clear visible fracture in the open state, and the isolation knife is linked with the three-phase vacuum arc extinguishing chamber. By coordinating the timing of actions, the vacuum arc extinguishing chamber extinguishes the arc during the breaking and closing process, while the isolation knife does not initiate an arc during the breaking and closing process, completing the function of the composite electrical device; �� Fully open type. The vacuum arc extinguishing chamber is wrapped with high insulation performance silicone rubber, which does not require sealing, oil filling, or inflation; �� Can be used in conjunction with fuses; �� Can interrupt short-circuit current; �� The installation method is mainly vertical installation, but it can also be installed horizontally, manually or electrically operated. The operating mechanism is integrated with the switch body. �� It has simple operation and single handle operation (both equipped with opening and closing function actions).

The main technical parameters of FZW20-12/T630A-20 outdoor AC high-voltage vacuum isolation load switch are shown in Table 1

serial number	name	unit	parameter value
one	rated voltage	KV	twelve
two	rated current	A	six hundred and thirty
three	rated frequency	HZ	fifty
four	Rated Active load breaking current	A	six hundred and thirty
five	Rated closing and breaking current	A	six hundred and thirty
six	Rated short-circuit breaking current	KA	six point three
seven	Rated cable charging breaking current	A	ten
eight	Rated power frequency withstand voltage arc extinguishing chamber/isolation fracture	KV	42/48
eight	Rated lightning impulse withstand voltage arc extinguishing chamber/isolation fracture	KV	75/85
nine	Rated short-time withstand current	KA	16(20)
ten	Rated short-circuit duration	S	four
eleven	Rated peak withstand current	KA	40(50)
twelve	Rated short-circuit closing current	KA	40(50)
thirteen	mechanical life	time	ten thousand
fourteen	Rated opening distance	mm	7±1
fifteen	Vacuum arc extinguishing overtravel	mm	3 +1-0.5
sixteen	Average closing speed (arc extinguishing chamber)	m/s	0.7±0.3
seventeen	Average opening speed (arc extinguishing chamber)	m/s	1.1±0.3
eighteen	Synchronization of three-phase closing	m/s	��5
nineteen	Rated contact pressure	N	800±100
twenty	When closing, the contact of the arc extinguishing chamber bounces	ms	��3
twenty-one	Isolation fracture distance	mm	two hundred
twenty-two	main circuit resistance	�̦�	��200
twenty-three	Electric operating mechanism power supply voltage	V	AC/DC 100220

Dimensions of FZW20-12/T630A-20 Outdoor AC High Voltage Vacuum Isolation Load Switch

[Outdoor high-voltage load switch]FZW��-27.5/D1250-20 Outdoor High Voltage AC Vacuum Load Switch

2026-6-19 19:59:24

FZW �� -27.5/D1250-20 outdoor high-voltage AC vacuum load switch isolation switch combination device (hereinafter referred to as the combination device), single-phase column structure, novel structure, with obvious visible fracture, using an operating mechanism to drive the vacuum arc extinguishing chamber, has a large breaking capacity, does not arc when breaking and closing current, has no fire or explosion hazard, can be operated quickly and frequently, has a long electrical life, and is maintenance free.

Application of FZW �� -27.5 Outdoor High Voltage AC Vacuum Load Switch Isolation Switch Combination Electrical Appliance
Combination electrical equipment is a single-phase AC 50Hz, rated voltage 27.5kV single pole outdoor high-voltage switchgear (at an altitude of 2000 meters) widely used in electrified railways for breaking load currents, no-load transformers, cable currents, capacitor currents, and closing short-circuit fault currents.

Environmental conditions for the use of FZW �� -27.5 outdoor high-voltage AC vacuum load switch isolation switch combination electrical apparatus
a. Outdoor installation, ambient air temperature ± 40 ��;
b. Altitude not exceeding 2000 meters;
c. Relative humidity: not exceeding 95%;

Scope of application and main technical parameters
The load isolation switch is installed on an outdoor pole and must be able to open and close the normal load current of the line, and integrate the function of the isolation switch to form a visible break. This load isolation switch can be installed in power supply areas such as locomotive depots, partition pavilions, turnaround sections, and station yards, replacing the installation of isolation switches on columns and eliminating the need for circuit breakers specifically designed to cut off normal load currents.

The rated parameters of FZW �� -27.5 outdoor high-voltage AC vacuum load switch isolation switch combination are as follows:
Rated voltage: 27.5kV
Rated current: 1250A
Rated frequency: 50Hz
Rated active load breaking current: 1250
One minute power frequency withstand voltage: 95kV
Isolation fracture distance: �� 400mm
Dynamic stable current: 31.5kA
Thermal stability current: 12.5 kA
Rated short-circuit closing current: 12.5kA
Short circuit current duration: 4s

Overall layout (as shown in the diagram)
The arc extinguishing chamber is installed on the static contact at the incoming line end, and is connected in parallel with the main electrical circuit - the static contact when in the closed position, ensuring that the switch has strong overload bearing capacity and reliable conductivity (equivalent to a closed isolation switch at this time). The isolation fracture is connected with an isolation knife. The driving force of the arc extinguishing chamber is a fast mechanism, and the isolation knife action drives the conductive fork on the fast mechanism to store energy for the fast mechanism. The conductive fork also plays a role in conducting current during the transient process of closing and opening. In order to enable the isolation knife to move quickly, a passing spring is installed on the spindle of the isolation knife to ensure that the isolation knife can move quickly when it rotates to a certain angle during the opening and closing process.

Action principle (as shown in the diagram)
When the switch is in the closed state, current flows in from the static contact and divides into two paths. One path flows through the vacuum arc extinguishing chamber - conductive fork to the isolation knife (this path has extremely low current), and the other path flows directly from the static contact to the isolation knife, and then flows out from the isolation knife to the output board.

Breaking process: The spindle rotates under the drive of the electric mechanism, and the isolation knife rotates upward through the insulating operating rod. The isolation knife disengages from the static contact, and all current flows through the vacuum arc extinguishing chamber - the conductive fork. The isolation knife edge does not shake, and the isolation knife drives the conductive fork to continue moving upward. When it reaches a certain angle (43 °), the fork triggers the fast mechanism inside the box, driving the vacuum arc extinguishing chamber to quickly break the current, and the circuit is in an open circuit state. The pulley and conductive fork on the final isolation knife are separated in a no-load state, forming a visible isolation fracture and completing the disconnection operation.

The action sequence of the closing process of the switch is opposite to that of the opening process.

When in the closed position, due to the much smaller line resistance between the isolation blade and the static contact compared to the line resistance composed of the fork and the arc extinguishing chamber, the current mainly flows through the circuit composed of the isolation blade and the static contact. In the normal powered state, the current passing through the vacuum arc extinguishing chamber circuit of the temperature rise pole calibration is very small in the closed state of the isolation blade, so this product has reliable electrical performance and outstanding load-bearing capacity.

Installation dimensions and installation method of FZW �� -27.5 outdoor high-voltage AC vacuum load switch isolation switch combination electrical device

[Outdoor high-voltage load switch]FW5-6/200 type gas producing load switch

2026-6-19 19:59:22

FW5-6/2000 gas producing load switch AC 50HZ. Rated voltage 10KV. Three phase outdoor high-voltage switchgear, used for breaking and closing rated current, capacitor current, and circulating current on 10KV distribution lines.

The FW5-6 type load switch is a three pole linkage, installed on a single pole on the column, operated with an insulating rod or rope, or can be operated with a pole operated mechanism.

[Outdoor high-voltage load switch]FW5-12/200 type gas producing load switch FW5-12/50 FW5-12/100 FW5-12/200 FW5-12/400

2026-6-19 19:59:13

FW5-12/200 type gas producing load switch AC 50HZ. Rated voltage 10KV. Three phase outdoor high-voltage switchgear, used for breaking and closing rated current, capacitor current, and circulating current on 10KV distribution lines.

The FW5-12 load switch is a three pole linkage, installed on a single pole on the column, operated with an insulating rod or rope, or can be operated with a pole operated mechanism.

[Outdoor high-voltage load switch]FKW��-12/630 Type Outdoor Column Load Isolation Switch

2026-6-19 19:59:04

FKW �� -12/630 outdoor pole mounted load isolation switch (hereinafter referred to as the switch) is suitable for systems with a rated voltage of 10kV and AC 50Hz. It is used for breaking and closing load currents, as well as for cutting off and closing no-load electrical lines of IOkV voltage transformers. This switch can be equipped with manual or electric operating mechanisms and is an advanced and reliable outdoor switch equipment for terminal protection of 10kV lines today. Can be installed on top of or inside the pole:

FKW �� -12/630 Outdoor Column Load Isolation Switch Model and Meaning

F K W ��-12/630
�� - Rated current A
�� - Rated voltage kV
��-- Design sequencer
��-- Outdoor type
��------- Air type
��----------- Load cutting off

Normal usage conditions of the product
Altitude not exceeding 1000m
The ambient temperature should not exceed+40 �� and should not be lower than -40 ��
The wind pressure shall not exceed 700Pa (equivalent to a wind speed of 34m/s);
Ice thickness not exceeding 10mm·
The pollution level shall not exceed Grade IV in GB5582

model	FKW��-12/630
Rated voltage kV	twelve
Rated current A	six hundred and thirty
Rated short-time withstand current s/kA (thermal stability)	4/20
Rated peak withstand current kA (dynamic stability)	fifty
Rated short-circuit closing current 31.5kA (peak)	6 times
Rated short-circuit closing current 50kA (peak)	2 times
1-minute power frequency withstand voltage kV (effective value) wet/dry	34/42
Rated lightning impulse withstand voltage kV (to ground/fracture)	75/85
Rated cable charging breaking current A	ten
Rated no-load transformer breaking capacity kVA	one thousand two hundred and fifty
Mechanical lifespan (times)	two thousand

Product Features
The FKW �� -12/630 load switch is mainly composed of an arc extinguishing chamber, an isolation switch, a post insulator, and a manual mechanism. The arc extinguishing chamber is based on the principle of gas generation arc extinguishing. It uses a spring energy storage device. The current carrying parts of the dynamic and static contacts of the isolation knife switch are made of hard copper. The manual mechanism performs opening and closing operations on the load switch through a connecting rod, and the speed of operation is independent of the speed of load cutting and closing. Push the spring energy assist rod on the arc extinguishing chamber with the finger to open the switch for energy storage, and open the moving contact to a certain position. Separate the finger from the spring energy assist rod, reset the spring, and quickly disconnect the current in the arc extinguishing chamber.
The operating mechanism is manually operated. The switch can also be operated by using an electric mechanism driven by a connecting rod to drive the crank arm. The opening and closing of the switch is driven by the connecting rod driven by the electric operating mechanism. The electric mechanism uses AC and DC power sources and is selected by the user at the time of ordering.

FKW �� -12/630 Outdoor Column Load Isolation Switch

[Outdoor high-voltage load switch]FZW36-40.5 outdoor high-voltage vacuum isolation load switch

2026-6-19 19:58:55

I. Overview
1.1 FZW36-40.5/D1250-20 outdoor high-voltage vacuum isolation load switch (hereinafter referred to as load switch) is a three-phase AC 50Hz, rated voltage 40.5kV outdoor high-voltage switchgear suitable for breaking and closing the load current of urban or rural distribution systems and the breaking transfer current of fuses. Equipped with an electric mechanism and controller, it can be used as a line sectionalizer or automatic sectionalizer. Due to the adoption of a new insulation structure design and vacuum arc extinguishing chamber, this load switch has a clearly visible fracture after opening, and also functions as an isolation switch. In addition, it has a large opening capacity, no oil, and therefore has the characteristics of no pollution to the environment, no explosion hazard, long electrical life, and maintenance free. 1.2 The technical conditions of this load switch comply with the shared technical requirements of the national standard GB3804.1-xx, 3-36kV AC high voltage load switch, and GB/T11022-1999 high voltage switchgear and control equipment standards.

2�� Usage environment and conditions
��. The ambient air temperature is within ± 40 ��;
��. Pollution level not exceeding level III
c. Altitude not exceeding 1000 meters;
d. The wind pressure shall not exceed 700Pa (equivalent to a wind speed of 34 meters per second);
e. Condensation can occur during periods of high humidity when the temperature drops sharply;
f. Places without fire, explosion, or chemical corrosion;
g. There are no frequent severe vibrations, and the seismic intensity does not exceed 8 degrees.

3�� Main technical data of FZW36-40.5 outdoor high-voltage vacuum isolation load switch
2.1 The main technical parameters of the load switch are shown in Table 1

Table 1

serial number	project	unit	parameter
one	rated voltage	kV	forty point five
two	rated current	A	630, 1250
three	Power frequency withstand voltage (1 minute)	?	?
	Vacuum arc extinguishing chamber fracture (before and after electrical life)	kV	seventy
	Alternating and relative (dry test)	kV	ninety-five
	Phase to phase, relative to ground (wet test)	kV	eighty-five
	Isolation fracture (dry test)	kV	one hundred and ten
	Isolation fracture (wet test)	kV	ninety-five
four	Lightning impulse withstand voltage	?	?
	Alternating and relative to each other	kV	one hundred and eighty-five
	isolation gap	kV	two hundred and fifteen
five	Rated short-circuit closing current (peak)	kA	fifty
six	Rated dynamic stability current (peak value)	kA	fifty
seven	4-second thermal stability current (effective value)	kA	twenty
eight	Rated cable charging breaking current	A	ten
nine	mechanical life	time	ten thousand
ten	Total weight	kg	three hundred

The main mechanical characteristics of the load switch are shown in Table 2
Table 2

serial number	project	unit	parameter
one	contact gap	mm	14±1
two	Contact overtravel	mm	2±0.5
three	Three phase opening and closing asynchrony	ms	��5
four	DC resistance of each phase circuit	�̦�	��200
five	Opening time	s	��8
six	Closing time	s	��8

[Outdoor high-voltage load switch]FZW��-40.5 Type Outdoor Vacuum Isolation Load Switch

2026-6-19 19:58:50

FZW �� -40.5 outdoor high-voltage vacuum isolation load switch (hereinafter referred to as load switch) is an outdoor high-voltage switchgear equipment with three-phase AC 50Hz and rated voltage of 40.5kV. It is suitable for breaking and closing the load current of urban or rural distribution systems and the transfer current of fuses. When equipped with a motor mechanism and controller, it can be used as a line section switch or automatic disconnector. Due to the adoption of a new insulation structure design and vacuum arc extinguishing chamber, the load switch has a visible fracture after opening, which also functions as an isolation switch. In addition, it has a large opening capacity, no oil, and therefore has the characteristics of no pollution to the environment, no explosion hazard, long electrical life, and maintenance free.

1�� Overview
FZW��-40.5/The D-20 outdoor high-voltage vacuum isolation load switch (hereinafter referred to as the load switch) is an outdoor high-voltage switchgear equipment with three-phase AC 50Hz and rated voltage of 40.5kV. It is suitable for breaking and closing the load current of urban or rural distribution systems and the transfer current of fuses. When equipped with an electric motor mechanism and controller, it can be used as a line section switch or automatic disconnector. Due to the adoption of a new insulation structure design and vacuum arc extinguishing chamber, the load switch has a visible fracture after opening, which also functions as an isolation switch. In addition, it has a large opening capacity, no oil, and therefore has the characteristics of no pollution to the environment, no explosion hazard, long electrical life, and maintenance free.

2�� Main technical parameters of FZW �� -40.5 outdoor vacuum isolation load switch

serial number	name	unit	parameter value
one	rated voltage	KV	forty point five
two	rated current	A	630, 1250
three	Rated arc extinguishing chamber fracture (before and after electrical life)	KV	seventy
four	Alternating and relative (dry test)	KV	ninety-five
five	Phase to phase, relative to ground (wet test)	KV	eighty-five
six	Isolation fracture (dry test)	KV	one hundred and ten
seven	Isolation fracture (wet test)	kV	ninety-five
seven	Lightning impulse withstand voltage
eight	Alternating and relative to each other	KV	one hundred and eighty-five
nine	isolation gap	KV	two hundred and fifteen
ten	Rated short-circuit closing current (peak)	KV	fifty
eleven	Rated stable current (peak value)	KV	fifty
twelve	4-second thermal stability current (effective value)	KV	twenty
thirteen	Rated cable charging breaking current	A	ten
fourteen	mechanical life	time	ten thousand
fifteen	Total weight	KG	three hundred

[Outdoor high-voltage load switch]FLW(B)-12 Outdoor AC high voltage sulfur hexafluoride load switch

2026-6-19 19:58:46

FLW (B) -12 outdoor AC high-voltage sulfur hexafluoride load switch, suitable for 10kV distribution lines. It is an electrical equipment that uses sulfur hexafluoride (SF6) gas as the insulation medium, specifically designed for frequent switching of parallel capacitor banks, and installed outdoors. It has the characteristics of no bounce when closing, no reignition when opening, and long service life.

FLW (B) -12 outdoor AC high-voltage sulfur hexafluoride load switch integrates switch, control box, and current transformer, with a compact structure and easy installation. After being equipped with a high-voltage reactive power compensation automatic controller, automatic switching of capacitors can be achieved, and it also has protection functions such as short circuit, overcurrent, overvoltage, and undervoltage.

Execution standard: GB3804-1990 "3-63kV AC High Voltage Load Switches"

[Outdoor high-voltage load switch]FZW13A-12/T630 Outdoor AC High Voltage Load Switch

2026-6-19 19:58:37

FZW13A-12/T630 outdoor AC high voltage load switch (hereinafter referred to as load switch) is a control device in a rated voltage 12kV, 50Hz AC three-phase high voltage distribution network. Its main purpose is to disconnect and close load currents in power lines, circulating currents in ring power grids, inductive currents of no-load transformers, and capacitive currents of capacitor banks (or cables); It also has the ability to handle short-circuit currents and withstand the electric and thermal effects of short-circuit currents.
The load switch is operated by a spring mechanism. There are two types of spring mechanisms: motor energy storage (electric) and manual energy storage (manual). The electric spring mechanism is operated by a motor (or manually operated) to store energy for closing, an electromagnet, or manual opening; The opening and closing of manual mechanisms are all done manually. The performance of the spring mechanism is very reliable.
The load switch adopts a vacuum arc extinguishing chamber device, which is suitable for frequent operation places and has the characteristics of long service life, maintenance free, no explosion, and no fire hazard. The load switch adopts an air silicone rubber composite insulation structure, which has reliable insulation performance, no hidden dangers such as oil and gas leakage, and strong adaptability to environmental conditions. The shell of the load switch comes in two types: stainless steel and ordinary steel.
This load switch can also be combined in the form of load switch isolation switch, load switch isolation switch ZnO lightning arrester, etc. according to the user's needs, and supplied in the form of combined electrical appliances. Load switches can be equipped with 2-3 current transformers of 630A-50A (rated current)/5A according to user requirements.

2�� Environmental conditions for use
1. The ambient air temperature ranges from+40 �� to -30 ��;
2. Altitude not exceeding 3000 meters;
3. The wind pressure shall not exceed 700Pa (equivalent to a wind speed of 34m/s);
4. The pollution level shall not exceed level IV;
5. There is no frequent severe vibration, and the seismic intensity does not exceed 8 degrees.

3�� Meaning diagram of model

4�� Outline dimension diagram of combination switch

5�� Main Technical Parameters of FZW13A-12/T630 Outdoor AC High Voltage Load Switch

[Outdoor high-voltage load switch]FKW29-12 outdoor high-voltage isolation load switch

2026-6-19 19:58:28

The FKW29-12 outdoor high-voltage isolation load switch is suitable for outdoor AC 50Hz, rated voltage 12kV power systems, with rated currents of 400A and 630A. It can disconnect and close load currents, as well as disconnect transformer no-load currents, overhead lines, cable lines, and capacitor banks at a certain distance. It has functions such as disconnection, isolation, connection, switching, and protection, and is suitable for overhead distribution lines in urban networks, rural networks, railways, petrochemicals, etc. This product is an ideal electrical equipment for power distribution network renovation.

1. Double blade isolation switch and load terminal plated with thick silver; 2. Special grease coating and guiding device ensure that the closing is in place, accurate and error free; 3. Fully open type. The arc extinguishing chamber is wrapped with silicone rubber corrugated pipes to prevent moisture, and is not filled with oil or gas; 4. Can be equipped with manual and electric mechanisms; 5. There is a clear visible fracture in the open state, which completes the function of the composite electrical device; 6. Can be equipped with grounding switches and fuses; 7. It can be installed in single-phase or three-phase, with various installation methods, including single pole or double pole installation. 8. Suitable for overhead distribution lines in urban and rural power grids, railways, petrochemicals, etc.

Project Name		unit	parameter
rated voltage		kV	twelve
rated current		A	400,630
4-second rated short-time withstand current (effective value)		kA	16,20
Rated short-circuit closing current		kA	40,50
1-minute work pressure endurance	Dry test	kV	forty-eight
1-minute work pressure endurance	Wet test	kV	forty-two
Lightning impulse withstand voltage (phase to phase and relative to ground)		kV	75/85
mechanical life		time	two thousand

[Outdoor high-voltage load switch]FZW20-12 outdoor vacuum isolation load switch

2026-6-19 19:58:19

The FZW20-12 outdoor vacuum isolation load switch is suitable for outdoor AC 50Hz, rated voltage 12kV power systems, with a rated current of 630A. It can open and close load currents, as well as open and close transformer no-load currents, overhead lines, cable lines, and capacitor banks at a certain distance. It has functions such as disconnection, isolation, connection, switching, and protection

FZW20-12 outdoor vacuum isolation load switch is suitable for overhead distribution lines in urban and rural power grids, railways, petrochemicals, etc. It should be noted that this product has the ability to interrupt short-circuit current. This product is an ideal electrical equipment for power distribution network renovation.

Project Name		unit	parameter
rated voltage		kV	twelve
rated current		A	400,630
4-second rated short-time withstand current (effective value)		kA	16,20
Rated short-circuit closing current		kA	40,50
Rated short-circuit breaking current (when equipped with a fuse)		kA	six point three
1-minute work pressure endurance	Dry test	kV	forty-eight
1-minute work pressure endurance	Wet test	kV	forty-two
Lightning impulse withstand voltage (phase to phase and relative to ground)		kV	75/85
mechanical life		time	ten thousand

1. Adopting a vacuum arc extinguishing chamber, there is no risk of fire or explosion;
2. There is a clear visible fracture in the open state, which completes the function of the composite electrical device;
3. Fully open type. The vacuum arc extinguishing chamber is wrapped with high insulation performance silicone rubber, which does not require sealing, oil filling, or inflation;
4. Can be equipped with grounding switches and fuses;
5. Can interrupt short-circuit current;
6. There are various installation methods, mainly single pole and manual operation, as well as double pole installation and electric operation.
7. Suitable for overhead distribution lines in urban and rural power grids, railways, petrochemicals, etc.

[Outdoor high-voltage load switch]FW5-10/200 outdoor high-pressure gas production load switch

2026-6-19 19:58:10

FW5-12/200 outdoor high-voltage gas production load switch (hereinafter referred to as load switch) is used for opening and closing load currents in a three-phase system with AC 50Hz and rated voltage of 10kV.
The load switch is installed on a single pole on the column and can be operated with an insulating rod or rope, or with a pole operated mechanism.

FW5-10/200 outdoor high-pressure gas production load switch model and meaning
F W 5-��/��
�� - Rated current A
��-- Rated voltage kV
��-- Design Number
��------- Outdoor
��--------- Load switch

Normal operating conditions of FW5-10/200 outdoor high-pressure gas producing load switch
The ambient temperature should not exceed+40 �� and should not be lower than -40 ��
Altitude not exceeding 1000m
The wind pressure shall not exceed 700Pa (equivalent to a wind speed of 34m/s);
A place without chemical corrosion, flammability, explosiveness, severe pollution, and severe vibration.

model	Rated current A	4s stable current kA (Effective value)	Dynamic stability current kA (Peak value)	Electrical lifespan at rated current (Split, merge) times	Rated breaking current (Effective value) kA	Rated short-circuit closing current (Peak) kA	Weight kg
twelve	two hundred	four	ten	Each 50	one point two five	three point one five	seventy-five

The chassis is welded from angle steel and steel plates, and is equipped with a main shaft, supporting bearings, and a release spring seat, as well as a buffer spring. The upper pillar insulator of the chassis is fixed to the arc extinguishing chamber, and the lower pillar insulator is fixed to the switch blade. The operating mechanism is attached to the right side of the chassis and connected to the spindle. There are several connecting arms welded on the spindle, some of which are connected to the switch blade through rod insulators, some compress the opening spring to store energy for opening, and some collide with the buffer spring for positioning during opening.
The arc extinguishing chamber is mainly composed of a wiring socket, a protective tube, a static contact socket, a contact finger, a contact finger spring, a conductive rod, an arc extinguishing head, an arc extinguishing tube nozzle, and a thrust spring, as shown in Figure 57
1. Closing (two-step action)
Firstly, gently pull down the closing handle and rotate the main shaft clockwise. The lever connecting arm drives the lever insulator to make slight contact between the switch blade and the top of the conductive rod. At this point, the circuit has not yet made contact (the main purpose of this action is to reduce the pulling stroke and facilitate the next step of rapid closing. Special attention must be paid during operation).
Then quickly pull down with force, and the main shaft continues to rotate clockwise. The blade clamp is wedged into the concave neck at the top of the conductive rod, and the conductive rod moves rapidly towards the arc extinguishing chamber. When the main shaft rotates to the closing position of the mechanism, the conductive rod is inserted into the static contact finger, and the circuit is connected. Simultaneously, the opening spring and the thrust spring in the arc extinguishing chamber compress and store energy to prepare for the opening.
2. Open the circuit breaker
Pull down the release tab, the mechanism disengages, and the main shaft rotates counterclockwise through the release lever under the action of the release spring. The lever arm drives the lever insulator to move the switch blade. The conductive rod is separated from the static contact finger by the clamping of the blade and the pushing force of the thrust spring, forming an internal fracture. The arc is generated between the arc extinguishing ring and the arc extinguishing ring. As the conductive rod rapidly moves outward, the elongated arc burns in the narrow gap between the arc extinguishing head and the arc extinguishing tube. The arc extinguishing material produces a large amount of gas due to the arc action. The pressure inside the arc extinguishing chamber surges, and then the airflow is rapidly ejected towards the nozzle, forming a strong longitudinal blow that cuts off the arc extinguishing line. At the same time, the switch blade continues to move under the action of the opening spring and its own weight, and finally separates from the conductive rod to form an external fracture, keeping the switch in a clear opening state.
Installation and usage precautions
1. As the load switch undergoes strict adjustment and testing before leaving the factory, in general, it does not need to be disassembled or readjusted internally. Only the screws at various locations need to be checked for looseness.
Before putting into operation, the insulator should be wiped clean and all mechanical rotating parts should be coated with mechanical oil HJ-30
3. The load switch is a single pole clamp type vertically installed with two clamps and four bolts (provided by the user) fixed to the pole through the chassis
4. Perform 5 to 10 no-load opening and closing operations, with no stagnation or jamming of the conductive rod and mechanism, and an external isolation fracture greater than 110mm during opening
When connecting the busbar to the load switch terminal, the bolts should be tightened. At the same time, the load switch should not be subjected to mechanical stress from the busbar.
6. Process the contact surface of the grounding point to expose the metallic luster, ensuring good contact, and connect the grounding wire.
7. Under the condition that the user complies with the transportation, storage, and use rules stipulated by the manufacturer, if the product is damaged or cannot function properly due to poor quality within 18 months from the date of shipment from the manufacturer, the manufacturer shall repair or replace it for the user free of charge.
Ordering Instructions
Users should indicate the following information when placing an order: product model, name, rated voltage, rated current, rated breaking current, and quantity.
Spare parts: 1 arc extinguishing head, 3 pieces
2 arc extinguishing tubes, 3 pieces
3 connecting rods, 3 pieces
4 special wrenches, 1 piece.

[Outdoor high-voltage load switch]FLW34-12 Type SF6 Load Switch

2026-6-19 19:58:02

The FLW34-12 SF6 load switch is suitable for outdoor three-phase AC distribution systems with a rated voltage of 12kV and a rated frequency of 50Hz, and is used for opening and closing load currents and closing short-circuit currents.

Characteristics of FLW34-12 SF6 load switch:
SF6 (purity 99.99%) is used as a disconnecting and insulating medium.
2. The stainless steel shell is fully enclosed by argon arc welding, which has good anti-corrosion and sealing properties.
3. Use low-energy storage motors.
4. Can be used under various external conditions.
5. Lightweight and easy to transport.
6. Truly achieved maintenance free.
When the gas pressure drops to 0.03-0.07MPa, the switch can automatically lock.
8. High strength insulation performance.
9. Equipped with explosion-proof safety devices.

FLW34-12 SF6 load switch

[Outdoor high-voltage load switch]FW10 series outdoor load isolation switch

2026-6-19 19:57:44

FW10 series outdoor load isolation switch

rated voltage		KV	twelve
rated current		A	six hundred and thirty
Rated breaking current		A	six hundred and thirty
Rated short-circuit thermal stability current		KA/S	16/3
Rated short-circuit dynamic stability current (peak value)		KA	forty
Rated short-circuit closing current (peak)		KA	forty
Rated cable charging breaking current		A	ten
power frequency withstand voltage	Alternating to ground	KV	forty-two
power frequency withstand voltage	fracture	KV	forty-eight
Lightning impulse withstand voltage	Alternating to ground	KV	ninety-five
Lightning impulse withstand voltage	fracture	KV	one hundred and ten
mechanical life		time	two thousand
Number of times rated current is disconnected		time	twenty

FW10 series outdoor load isolation switch

[Outdoor high-voltage load switch]FZW32-12 Outdoor AC High Voltage Isolation Vacuum Load Switch

2026-6-19 19:57:35

The FZW32-12/T630-20 outdoor AC high-voltage isolated vacuum load switch is a new type of load switch designed based on the mature experience of existing domestic load switch production and advanced foreign technology. This load switch consists of an isolation switch, a vacuum arc extinguishing chamber, and an operating mechanism. Adopting the principle of vacuum arc extinguishing, it has the advantages of strong arc extinguishing ability, reliable performance, long service life, small size, no explosion hazard, and no environmental pollution.

FZW32-12 outdoor AC high-voltage isolated vacuum load switch is suitable for outdoor three-phase AC power distribution systems with rated voltage of 12kV and below, rated current of 630A, and rated frequency of 50Hz. It can be used to open and close distribution lines with load, and can also be used to open and close no-load lines and no-load transformers. At the opening position, it can meet the isolation power requirements specified for the isolation switch. This load switch can be used as a control circuit for power transmission and distribution systems in departments such as electricity, metallurgy, mining, and chemical engineering, and is also suitable for places with frequent operations.
Compliant with GB3804 "3-63kV AC High Voltage Load Switches".

Scope of application
FZW32-12D/T630-20 outdoor high-voltage vacuum isolation load switch is a new generation of high-voltage electrical products developed with imported technology. Its technical performance indicators comply with GB3804 and IEC standards, and it is suitable for outdoor 12kV, three-phase AC 50Hz power supply networks.

Main technical parameters of FZW32-12 outdoor AC high-voltage isolation vacuum load switch

Appearance and installation dimensions

FZW32-12 Outdoor AC High Voltage Isolation Vacuum Load Switch

[Indoor high-voltage load switch]FLN43-12 Type Three Position High Voltage Load Switch

2026-6-19 19:37:58

The FLN43-12 three position high-voltage load switch has a simple structure and complete functions:

Equipped with a multifunctional rotating three position switch inside;
The three position switch contact box adopts imported environmentally friendly materials;
Coaxial operation of "closure isolation grounding" without the need for interlocking devices;
Grounding switch related closing capacity;
There are no composite insulation measures between phases.

FLN43-12 type three position high-voltage load switch has safe and reliable performance:

Using SF6 gas as insulation and arc extinguishing medium;
The main components of the switch are all located in a sealed chamber;
Stainless steel chamber, fully welded and sealed;
Good airtightness, annual leakage rate �� 0.1%;
No on-site SF6 inflation work is required;
There is a pressure release device at the rear of the sealed chamber;
Maintenance free operation within the service life, with an expected lifespan of 20 years.
The insulation design has a large margin:
When used as a load switch and grounding switch, it can close the rated short-circuit closing current at least twice;
Used as an isolation switch, capable of breaking the rated current 100 times;
Operating mechanism
Operate vertically using a detachable handle;
Adopting a spring operated mechanism; The operating mechanism of the composite electrical unit is equipped with an energy storage release device;
The energy storage trip device of the operating mechanism can automatically trip the load switch when the fuse is blown or the parallel release device is activated;
There are two operation modes to choose from: manual and electric;
Remote control can be achieved.

Technical parameters of FLN43-12 three position high-voltage load switch

serial number	Name		unit	Technical specifications
one	rated voltage		kV	twelve
two	rated current		A	six hundred and thirty
three	rated frequency		Hz	fifty
four	Rated current breaking times		time	one hundred
five	Lightning impulse withstand voltage	To the ground, alternating with each other	kV	seventy-five
five	Lightning impulse withstand voltage	isolation gap	kV	eighty-five
six	1-minute power frequency withstand voltage	To the ground, alternating with each other	kV	forty-two
six	1-minute power frequency withstand voltage	isolation gap	kV	forty-nine
seven	1-minute power frequency withstand voltage of auxiliary circuit		kV	two
eight	Rated short-time withstand current (2s)		kA	twenty-five
nine	Rated peak withstand current		kA	sixty-three
ten	Rated closed-loop breaking current		A	six hundred and thirty
eleven	Rated Active load breaking current		A	six hundred and thirty
twelve	5% rated active load breaking current		A	thirty-one point five
thirteen	Rated cable charging breaking current		A	ten
fourteen	Rated short-circuit closing current		kA	sixty-three
fifteen	Rated pressure of SF6 gas (20 �� gauge pressure)		MPa	zero point zero five
sixteen	Annual leakage rate of SF6 gas		%	��0.1
seventeen	protection level		��	IP65

[Indoor high-voltage load switch]FN16A-12RD/200-31.5 type vacuum load switch combination electrical apparatus

2026-6-19 19:37:49

The FN16A-12RD/200-31.5 combination electrical appliance is suitable for networks with AC 50Hz and rated voltage of 6-10KV. FN16A-12D/630 can disconnect load current, FN16A-12RD/200-31.5 can disconnect load current, overload current and short-circuit current, especially suitable for places without oil, without maintenance and frequent operation requirements. This product can be equipped with a CS6-I type operating mechanism, and can also be operated directly on the switch without the need for an additional operating mechanism. The FN16A-12D/12-J switch can achieve both electric and manual operation simultaneously.
Environmental conditions for use

A �� Surrounding air temperature: upper limit+40oC;
Lower limit -25 oC
b �� Relative humidity: monthly average not exceeding 90%;
Daily average not exceeding 95%
c �� Altitude not exceeding: 1000m;
d �� There is no obvious pollution such as corrosion or flammable gases around;
e �� No frequent severe vibrations.

FN16A-12RD/200-31.5 Vacuum Load Switch Combination Electrical Appliance Model Meaning

serial number	project	unit	parameter
one	Rated voltage and maximum operating voltage	KV	twelve
two	rated frequency	Hz	fifty
three	Maximum rated current of fuse	A	two hundred
four	Rated transfer current	A	three thousand one hundred and fifty
five	The opening time of the fuse triggered switch	ms	thirty-one₀⁺⁵
six	Rated short-circuit breaking current (expected effective value)	KA	thirty-one point five
seven	Rated short-circuit breaking and closing current (expected peak)	KA	eighty
eight	1-minute power frequency withstand voltage (effective value) to ground, phase to phase, vacuum break/isolation break	KV	42/48
nine	Lightning impulse withstand voltage (peak) to ground, phase to phase, vacuum break/isolation break	KV	75/85
ten	Fuse impact output energy	J	2-5

FN16A-12RD/200-31.5 Vacuum Load Switch Combination Electrical Appliance

[Indoor high-voltage load switch]NAL36/NALF36 series load switch

2026-6-19 19:37:39

NAL36/NALF36 series load switch

[Indoor high-voltage load switch]NAL24/NALF24 series load switch

2026-6-19 19:37:30

NAL24/NALF24 series load switch

[Indoor high-voltage load switch]YKL(Z)-12 Outdoor remote control intelligent vacuum circuit breaker

2026-6-19 19:37:20

YKL (Z) -12 Outdoor Remote Control Intelligent Vacuum Circuit Breaker

[Indoor high-voltage load switch]MZF31-40.5/T1250-25 Outdoor column mounted high-voltage vacuum load switch

2026-6-19 19:37:12

MZF31-40.5/T1250-25 outdoor high-voltage isolation vacuum load switch is a new generation of high-voltage electrical equipment developed and produced by integrating advanced technologies at home and abroad. After strict type testing and long-term trial operation assessment, all technical performance indicators have reached GB3804 and IEC standards. This product is mainly designed for urban and rural power grid construction and renovation, and is suitable for power supply networks with rated voltage of 12KV and three-phase AC 50Hz. The chassis of this product is made of stainless steel material and carbon steel coated with hot-dip galvanizing and UV protection coating, ensuring the normal operation of the body in outdoor environments. The components are made of stainless steel material, ensuring the durability, stability, waterproof, salt spray and other performance of the load switch. This product has significant characteristics such as small size, light weight, beautiful appearance, easy operation, high parameters, large breaking capacity, safety and reliability, long electrical life, frequent operation, minimal maintenance, and obvious fracture. The operation mode adopts single lever manual operation, and can also be operated by electric or remote control.

Structural characteristics:
1. The ambient air temperature ranges from+40 �� to -30 �� (with a lower limit of -45 �� available upon special user requirements);
2. Altitude not exceeding 1000m, 2000m, 3000m;
3. The wind pressure shall not exceed 700Pa (equivalent to a wind speed of 34m/s);
4. The pollution level shall not exceed level IV;
5. There is no frequent severe vibration, and the seismic intensity does not exceed 8 degrees.

MZF31-40.5/T1250-25 Outdoor Column High Voltage Vacuum Load Switch Model Meaning

Main technical parameters of MZF31-40.5/T1250-25 outdoor column mounted high-voltage vacuum load switch

MZF31-40.5/T1250-25 Outdoor Column High Voltage Vacuum Load Switch

[Indoor high-voltage load switch]MZF12-12/T630-20 Outdoor column mounted high-voltage vacuum load switch

2026-6-19 19:37:03

The MZF12-12/T630-20 outdoor column mounted high-voltage vacuum load switch is a new generation of high-voltage electrical equipment developed and produced by integrating advanced technologies at home and abroad. After strict type testing and long-term operation assessment, all technical performance indicators have reached GB3804 and IC standards. This product is mainly designed for the construction and renovation of urban and rural power grids, and is suitable for power supply networks with a rated voltage of 12KV and three-phase AC 50Hz. The chassis of this product is made of stainless steel material and carbon steel coated with anti ultraviolet protection coating, ensuring the normal operation of the body in outdoor environments. The components are made of stainless steel material, ensuring the durability, stability, waterproof, salt spray and other performance of the load switch. This product has significant characteristics such as small size, light weight, beautiful appearance, easy operation, high parameters, large breaking capacity, safety and reliability, long electrical life, frequent operation, minimal maintenance, and obvious fracture. The operation mode adopts single lever manual operation, and can also be operated by electric or remote control.

Structural characteristics of MZF12-12/T630-20 outdoor column mounted high-voltage vacuum load switch:
1. The ambient air temperature ranges from+40 �� to -30 �� (with a lower limit of -45 �� available upon special user requirements);
2. Altitude not exceeding 1000m, 2000m, 3000m;
3. The wind pressure shall not exceed 70Pa (equivalent to a wind speed of 34m/s);
4. The pollution level shall not exceed level IV;
5. There is no frequent severe vibration, and the seismic intensity does not exceed 8 degrees.

MZF12-12/T630-20 Outdoor Column High Voltage Vacuum Load Switch Model Meaning

Main technical parameters of MZF12-12/T630-20 outdoor column mounted high-voltage vacuum load switch

MZF12-12/T630-20 Outdoor Column High Voltage Vacuum Load Switch

[Indoor high-voltage load switch]MZF62-12D/T630-20 Indoor High Voltage Vacuum Load Switch

2026-6-19 19:36:54

MZF62-12D/T630-20 indoor high-voltage vacuum load switch is a three-phase AC 50Hz indoor switchgear suitable for power systems with a rated voltage of 12kV. The switch has the ability to close, carry, disconnect loads and overload current; It can also disconnect and close no-load long lines, no-load transformers, and capacitors. MZF62-12D/T125-31.5 indoor high-voltage vacuum load switch fuse combination device is composed of the load switch and fuse, which not only has the above functions but also has protection functions.

Structural characteristics of MZF62-12D/T630-20 indoor high-voltage vacuum load switch:
Model meaning

Working and environmental conditions
1. Environmental temperature: upper limit+40 ��, lower limit -25 ��.
2. Altitude: 1000m;
3. Relative humidity, daily average not exceeding 95%, monthly average not exceeding 90%;
4. Places without conductive dust, corrosive gases, and water vapor;
5. Places without fire and explosion hazards;
6. Places without severe vibration and with an inclination of less than 3 °.

Main technical parameters of MZF62-12D/T630-20 indoor high-voltage vacuum load switch

Appearance and installation dimensions

MZF62-12D/T630-20 Indoor High Voltage Vacuum Load Switch

[Indoor high-voltage load switch]MZF68-12 series indoor high-voltage load switch

2026-6-19 19:36:46

The MZF68-12 series indoor high-voltage load switch has the advantages of advanced design, easy operation, compact structure, small size, light weight, fast switching speed, and high reliability performance. Suitable for AC 50Hz, rated voltage 12kV, rated current 630V, and three-phase distribution systems, especially suitable for ring network power supply in urban network construction and renovation projects, high-rise buildings, and public facilities. It is an ideal product for box type substations and transformer protection.

Structural characteristics of MZF68-12 series indoor high-voltage load switch:
Model meaning

Working and environmental conditions
1. Environmental temperature: upper limit+40 ��, lower limit -25 ��.
2. Altitude: 1000m;
3. Relative humidity, daily average not exceeding 95%, monthly average not exceeding 90%;
4. The surrounding air should not be significantly polluted by corrosive, flammable gases, and steam gases;
5. No frequent severe vibrations.

Main technical parameters of MZF68-12 series indoor high-voltage load switch

MZF68-12 series indoor high-voltage load switch appearance and installation dimensions

[Indoor high-voltage load switch]FKN12-24KV type high voltage load switch

2026-6-19 19:36:36

FKN12-24KV High Voltage Load Switch

[Indoor high-voltage load switch]FZRN21-40.5 Indoor High Voltage Vacuum Load Switch

2026-6-19 19:36:27

Overview
FZRN21-40.5 indoor high-voltage vacuum load switch and combination electrical equipment, suitable for three-phase AC 40.5kV, 50HZ power systems, or used in conjunction with distribution equipment and ring network switchgear, combined AC power stations, etc., widely used in wind power generation Chengwang construction and renovation projects, industrial and mining enterprises, high-rise buildings, and public facilities can serve as power supply units or terminal equipment for the ring network, playing a role in the distribution, control, and protection of electrical energy. The technical performance of this product complies with the requirements of GB16926-1997 "AC High Voltage Load Switch Fuse Combination Apparatus" and IEC420 "AC High Voltage Load Switch Fuse Combination Apparatus".
This product has the advantages of high breaking capacity, safety and reliability, long electrical life, frequent operation, compact structure, small size, light weight, and basically no maintenance required. The switch has the ability to disconnect rated current, overload current, short-circuit current, and prevent equipment from running in phase loss. The switch has a visible isolation fracture, equipped with a grounding switch and electric spring mechanism with closing ability, and has remote control capability.

2. Model and meaning of FZRN21-40.5 indoor high-voltage vacuum load switch
2.1 High voltage vacuum load switch

2.2 High voltage vacuum load switch fuse combination

3. Usage conditions
Normal usage conditions
3.1 The ambient air temperature shall not exceed 40 ��, and the average temperature measured within 24 hours shall not exceed 35 ��, with a minimum ambient air temperature of -25 ��;
3.2 The impact of sunlight radiation can be ignored;
3.3 The altitude shall not exceed 1000m;
3.4 The surrounding air is not significantly polluted by dust, smoke, decay, corrosive and/or flammable gases, steam or salt spray;
The daily average relative humidity for planting should not exceed 95%; The daily average water vapor pressure shall not exceed 22kPa; The monthly humidity does not exceed 90% of the average value; The average monthly water vapor pressure shall not exceed 1.8KPa;
3.6 Vibration or ground motion from outside the switchgear and control equipment can be ignored;
The amplitude of electromagnetic interference induced in the secondary system shall not exceed 1.6kV.

4. Technical parameters of FZRN21-40.5 indoor high-voltage vacuum load switch
4.1 Main technical parameters of composite electrical appliances

4.2 Technical parameters of vacuum load switch assembly and adjustment in combination electrical appliances

4.3 Technical parameters after assembly and adjustment of isolation switches equipped with composite electrical appliances

4.4 Technical parameters after assembly and adjustment of grounding switch for combination electrical appliances

4.5 Technical parameters of fuses for combination electrical appliances

5. Structure and working principle
5.1 Structural Features
The combination electrical device is a three pole linkage structure: mainly composed of a frame, a vacuum arc extinguishing chamber, an isolation switch (equipped with fuses), a grounding switch, and a spring operating mechanism. The isolation switch, vacuum arc extinguishing device, and grounding switch are fixed to the frame through insulators, and the spring operating mechanism is installed on the side plate of the frame.
5.2 Working principle
5.2.1 Operation of vacuum arc extinguishing chamber
The operation mode of the vacuum arc extinguishing chamber of the composite electrical appliance adopts an electric spring operating mechanism for closing, a release electromagnet for opening, and can also be used for manual closing. Opening operation: When manually closing, use the operating handle to rotate the energy transmission shaft of the spring operated mechanism clockwise.
5.2.2 Opening and closing operations of isolating switches and grounding switches
A reliable mechanical interlocking device is installed between the vacuum arc extinguishing chamber, isolation switch, and grounding switch of the composite electrical appliance, and the isolation switch and grounding switch are operated by the same axis. When the isolation switch is closed, the vacuum load switch is finally closed. The opening sequence is the opposite, only when the vacuum load switch is in the opening state, can the isolation switch and grounding switch be operated.
5.2.3 Fuse impact tripping and opening
When a combination electrical device is in the closed position and a short-circuit current or overload current flows through the main circuit, at least one phase of the fuse melts.
The action of the impactor and the opening speed depend on the magnitude of the current. The larger the current, the faster the opening speed, causing the mechanical release device of the combination electrical appliance to operate. In this way, the vacuum arc extinguishing chamber can achieve reliable and fast opening under the action of the opening spring.

6. Appearance and installation dimensions of composite electrical appliances

External appearance and installation dimensions of load switch

Appearance and installation dimensions of composite electrical appliances

7. Acceptance and installation
7.1 Delivery Conditions
The assembled composite electrical appliances in the factory must undergo integrity inspection before leaving the factory, and strict factory tests must be carried out in accordance with the national standard GB 16926 and the technical conditions of the product to ensure the correctness of the structure and function of each composite electrical appliance leaving the factory.
7.2 Acceptance
After receiving this switchgear, the recipient should perform the following tasks:
a) Check whether there is a shortage of goods according to the packing list;
b) Check whether the goods are intact and undamaged, and whether they have been damaged (such as by moisture or other adverse effects);
c) If serious damage is found to the goods, the supplier should be notified in a timely manner and a record should be made (taking photos if necessary)
7.3 Installation
Combination electrical appliances should be installed on walls or in metal cabinets where the opening and closing status of the isolation knife can be observed. Connect 6 M16 bolts through the mounting holes on the frame to the fixed frame, and the installation of the manual operating mechanism is detailed in Figure 2. The isolation knife and arc extinguishing chamber should be in the open state during installation.
Accurate and professional installation is a fundamental and important condition for ensuring the fault free operation of composite electrical appliances. When installing composite electrical appliances, the following points should be noted:
a) It is necessary to ensure that the size design of the cabinet and the combination of electrical appliances is accurate and that all technical parameters are consistent;
b) The combination appliance is fixedly installed inside the switchgear, ensuring that it is not subjected to tension, compression, or deformation. Its four mounting bolts should be firmly connected and not loose;
c) When connecting the busbar, it should not be subjected to permanent tension or pressure. And ensure that the bolts connecting the busbar are firm and not loose.
8. Maintenance and upkeep
The maintenance of composite electrical appliances must be carried out by professionals who are familiar with various safety operating procedures and understand product performance. Record inspections and repairs. During maintenance work, ensure that there is no risk of electric shock.
The combination electrical appliances produced by our company have the characteristics of simple structure and durability, therefore they have a long service life. Under normal usage conditions, there is little maintenance work during the service life. However, due to differences in usage environments and their impact on the service life of composite electrical appliances, the following necessary inspections and maintenance work still need to be carried out.
a) According to the work environment, appropriate inspections should be carried out on the combination electrical appliance body within 6-12 months, especially checking its appearance. At the same time, it is necessary to check the surface of the equipment for dirt, moisture, and corrosion. Clean the dust on the surface of the insulation with a dry cloth, and then wipe off other impurities with a silk cloth dipped in cleaning agent (note that the cleaning agent used can be applied to plastic or synthetic plastic materials);
b) If the combination appliance is used in situations where it is not operated for a long time, the rotating friction part of the combination appliance should be slid every year;
c) Insulation tests should be conducted at least once a year on composite electrical appliances to determine if the vacuum arc extinguishing chamber is leaking or if there is a decrease in insulation strength due to other external factors.
9. Packaging, transportation, and storage
9.1 When packaging composite electrical appliances, they should be in the open state. Fixed on the bottom plate of the packaging box, with rainproof measures and complete packaging markings.
9.2 Combination electrical appliances must not be inverted or subjected to strong vibrations during transportation, and must not be exposed to moisture or rain. The outer surface of the product must not be damaged, and components must not be lost.
9.3 Combination electrical appliances can only be loaded and unloaded using the following tools: cranes, forklifts, or cranes. When lifting, the hook should not be attached to the body of the composite electrical appliance, but should be attached to the lifting hole marked with the lifting mark on the composite electrical appliance.
9.4 Combination electrical appliances should be stored in an open state for a long time and placed indoors in a dry, ventilated, moisture-proof, vibration proof, and harmful gas resistant place. Regular inspections should be conducted to ensure that the environment meets the requirements.

10. Random files and spare parts
10.1 Product Qualification Certificate;
10.2 Factory inspection report;
10.3 User Manual
10.4 Institution manual and wiring diagram;
10.5 Packing list;
10.6 Accessories and spare parts.

[Indoor high-voltage load switch]Indoor AC high voltage vacuum load switch

2026-6-19 19:36:18

FZN-40.5D/T630-20 indoor AC high-voltage vacuum load switch and FZRN-40.5D/T630-31.5 indoor AC high-voltage vacuum load switch fuse combination (hereinafter referred to as: vacuum load switch) are designed specifically for 35KV box type substations and can also be used as independent electrical units in power systems (cabinet installation or wall installation).
This product has a small size, easy installation, and simple operation. Its structure is scientifically reasonable, its movements are flexible and reliable, and it has obvious isolation fractures. The load switch can achieve maintenance free operation, and the combination electrical appliance can be equipped with a series of pin type fuses, which are safe and convenient to replace.
2. Purpose
The FZN-40.5 series vacuum load switch is used in AC 50HZ networks with a rated voltage of 40.5KV, as a means of breaking load current, overload current, and short-circuit current. The operation mode has both manual and electric functions, especially suitable for places that require oil-free, maintenance free, and frequent operation.

3. Model Description
Model name
FZN-40.5/T630-20 Indoor AC High Voltage Vacuum Load Switch (630A; 1250A)
FZN-40.5D/T630-20 Indoor AC High Voltage Vacuum Load Switch with Grounding Switch (630A; 1250A)
FZRN-40.5/T630-31.5 Indoor AC High Voltage Vacuum Load Switch Fuse Combination Apparatus (6.3A-125A)
FZRN-40.5D/T630-31.5 Indoor AC High Voltage Vacuum Load Switch Fuse Combination with Grounding Switch (6.3A-125A)

Note: The insulator of the vacuum load switch can be equipped with a sensor with a live display.
4. Operating environment
A. Altitude not exceeding 1000m; 2000m; 3000m; 3500m (The user must specify the requirements when placing an order, and if not specified, the altitude is 1000m)
B. The ambient air temperature ranges from -25 �� to+40 ��;
C. Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%; Water vapor pressure: daily average not exceeding 2.2kPa; The monthly average value does not exceed 1.8kPa;
D. The surrounding air is not significantly polluted by dust, smoke, corrosive or flammable gases, water vapor, or salt spray;
E. The amplitude of electromagnetic interference induced in the secondary system shall not exceed 1.6KV;

5. Main technical parameters of FZN, FZRN-40.5D/T630 indoor AC high-voltage vacuum load switch
5.1 Electrical Performance Parameter Table (see: Table 1) (Table 1)

serial number	project	unit	load switch	combined electrical apparatus	grounding switch
one	rated voltage	KV	forty point five	forty point five	forty point five
two	rated current	A	1250 630	sixty-three	--
three	rated frequency	HZ	fifty	fifty	fifty
four	Rated short-circuit breaking current	KA	--	thirty-one point five	--
five	Rated line charging interruption current	A	two point one	two point one	--
six	Rated ground fault breaking current	A	sixty-three	sixty-three	--
seven	Rated short-circuit closing current	KA	fifty	--	--
eight	Rated peak withstand current	KA	fifty	--	fifty
nine	Rated short-time withstand current/duration	KA	20/4	--	20/2
ten	Rated breaking transfer (handover) current	A	--	one thousand and seven hundred	--
eleven	Rated Active load breaking current	A	1250 630	--	--
twelve	Rated closed-loop breaking current	A	1250 630	--	--
thirteen	Rated cable charging current	A	twenty-one	twenty-one	--
fourteen	Rated voltage for secondary circuit operation	V	AC/DC220��110
fifteen	1-minute power frequency withstand voltage (effective value) to ground, phase to phase, vacuum break/isolation break	KV	95/118
sixteen	Full wave lightning impulse withstand voltage (peak) to ground, phase to phase, vacuum break/isolation break	KV	185/215
seventeen	main circuit resistance	�̦�	�� 120 (except for fuses)
eighteen	mechanical life	time	five thousand	two thousand	two thousand
nineteen	Maximum/minimum energy storage and closing operation voltage	V	AC 242/187
twenty	Maximum/minimum voltage for opening operation		AC 264/143
twenty-one	Switch level		M2/E2	M1	M1/E0

5.2 Mechanical performance parameters (see: Table 2) (Table 2)

serial number	project	unit	Vacuum arc extinguishing chamber	Isolation knife switch	grounding knife switch
one	contact gap	mm	17±1	��350	--
two	Contact overtravel	mm	4±1	--	--
three	Average opening speed	M/s	1.6±0.2	--	--
four	Average closing speed	M/s	0.8±0.2	--	--
five	Three pole opening and closing are not synchronized	ms	��2	��3mm	--
six	Rated closing bounce time	ms	��2	--	--
seven	Center distance between poles	mm	410+2	410+2	410+2
	Opening and closing operation force	N	two hundred

5.3 Electric parameters of spring operated mechanism. See: Tables 3 and 4

Magnetic single-phase DC energy storage motor (Table 3)

model	rated voltage	Rated output power	Normal operating voltage range
ZYJ220-53	AC/DC220V	��70W	85% -110% rated voltage

Opening electromagnet (independent power supply) (Table 4)

Rated working voltage (V)	AC220	AC110	DC220
Rated working current (A)	two point six seven	two point nine three	two
Rated electrical power (W)	< 587	< 312	four hundred and forty
Coil resistance value at 20 �� (��)	30±3	18±1.7	58±10
Normal operating voltage range	65% -120% rated working voltage reliable tripping; Do not disconnect when the rated operating voltage is less than 30%

6.1 Basic Structure

6.1.1 This combination electrical device is a three pole linkage structure. It mainly consists of a frame, a vacuum arc extinguishing chamber, an isolation knife switch, a fuse, a grounding knife switch, a trip transmission device, and a spring operating mechanism. The isolation knife switch and vacuum arc extinguishing chamber are fixed to the frame through insulators, and the fuse is installed on the back of the isolation knife switch. The grounding knife switch spindle is directly installed at the lower part of the frame. The spring operating mechanism is installed on the left side panel of the frame, and the operation mode is side operation. The operating mechanism drives the switch spindle, which rotates and uses a crank arm to drive the vacuum arc extinguishing chamber or isolation knife switch through an insulated operating rod, achieving the operation of opening and closing. The grounding knife switch and the isolation knife switch are connected together through a transmission link, and the two are interlocked during operation.

[Indoor high-voltage load switch]SVS(F)-12 Medium Voltage Sealed Vacuum Load Switch

2026-6-19 19:36:09

The SVS (F) -12 medium voltage solid sealed vacuum load switch and vacuum load switch fuse combination device have the following six characteristics:
1. It integrates four functions: isolation switch, vacuum load switch, vacuum load switch fuse combination, grounding knife, and interlocking mechanism, and the disconnect of the isolation switch is clearly visible.
2. The domestically leading application of APG solid sealed pole technology in medium voltage vacuum load switches and their combined electrical appliances has obtained multiple patents.
3. The use of "contact finger spring" internal electrical connection technology instead of exposed live soft connection methods has improved insulation strength and resistance to harsh environments.
4. Achieved a short-circuit breaking capacity of 20KA and equivalent protection function to a circuit breaker.
5. The electrical and mechanical lifespan has reached 20000 cycles.
6. Modular design, characterized by compact structure, small volume, easy installation, safe operation, and high reliability

[Indoor high-voltage load switch]ZFN16A-12 series indoor AC high-voltage load switch fuse combination electrical appliance

2026-6-19 19:36:01

The ZFN16A-12 series indoor AC high-voltage load switch fuse combination device meets the international and national standards of GB3807-90 "3-63KV AC high-voltage load switch" and IEC420 "AC high-voltage load switch fuse combination device" in terms of performance.
The ZFN16A-12 series indoor high-voltage vacuum load switch is suitable for use in 6-10KV three-phase AC 50HZ power grids as a means of breaking load currents and closing short-circuit currents. It is particularly suitable for places that require oil-free, non maintenance, and frequent operation
This product has the advantages of independent isolation fracture, low manual operation force, and can be equipped with two types of vacuum arc extinguishing chambers: ceramic tube or glass tube

Technical parameters of ZFN16A-12 series indoor AC high-voltage load switch fuse combination electrical device

serial number	name	unit	parameter
one	rated voltage	KV	twelve
two	rated current	A	six hundred and thirty
three	Rated Active load breaking current	A	six hundred and thirty
four	Rated closed-loop breaking current	A	six hundred and thirty
five	5% rated active load breaking current	A	thirty-one point five
six	Rated cable charging breaking current	A	twelve
seven	Breaking current of rated no-load transformer	A	1250KVA transformer no-load current
eight	1-minute power frequency withstand voltage (effective value) to ground and phase to phase	KV	42/48
nine	Full wave lightning impulse withstand voltage (peak) to ground and phase to phase	KV	75/85
ten	Rated peak withstand current	KA	fifty
eleven	Rated short-time withstand current	KV/S	20/2
twelve	Rated short-time closing current	KA	fifty
thirteen	Rated current breaking times	time	ten thousand
fourteen	mechanical life	time	ten thousand
fifteen	Allowable cumulative thickness of contact wear	mm	three
sixteen	Interphase center distance	mm	two hundred and ten
seventeen	Manual operation force distance	N.M	<100
eighteen	Dimensions: Width x Height x Depth	mm	700×800×300

[Indoor high-voltage load switch]FKRN16-12D High voltage load switch

2026-6-19 19:35:52

FKRN16-12D/630-20 indoor AC high voltage load switch (hereinafter referred to as FKN16-12D load switch) is a three-phase high voltage starting device with a rated voltage of 12kV and a rated frequency of 50Hz. It is used for breaking and closing load current, closed-loop current, no-load transformer and cable charging current, and closing short-circuit current. Load switches equipped with grounding switches can withstand short-circuit currents.
FKRN16-12D/125-31.5 AC high voltage load starting fuse combination (hereinafter referred to as FKN16-12 (R) D combination) is an indoor high voltage switchgear that combines FKRN16-12D load switch with S-port LAJ (XRNT port-10) high voltage current limiting fuse. It can disconnect any current up to the short-circuit current; The load switch disconnects the working current, the fuse disconnects the short-circuit current, and jointly disconnects any current between the working current and the full short-circuit current. At the same time, the fuse causes the load switch to open through its impact.

Scope of application
FKRN16-12D/Load Switch FKRN16-12D Combination Electrical Appliance is mainly used for load control and short-circuit protection in urban distribution stations and industrial electrical equipment powered by three-phase ring networks or terminals. Due to the more reliable protective effect of composite appliances on electrical equipment such as transformers than using circuit breakers, they are particularly suitable for ring networks, radiation replacement units, and box type substations.

Normal working environment
Using ambient air temperature: upper limit+40 ��, lower limit -25 ��;
Altitude not exceeding 1000M;
Relative humidity, with a daily average not exceeding 95% and a monthly average not exceeding 90%;
The surrounding air should not be significantly polluted by corrosive or flammable gases and water vapor;
No frequent vigorous exercise;
Pollution resistance level: Level II;
If the usage conditions exceed the above regulations, it shall be determined through consultation between the user and the manufacturer.

Technical parameters and performance of FKRN16-12D high-voltage load switch

serial number	project	unit	FKN16-12D/630	FKRN16-12D/125
one	rated voltage	kV	twelve
two	rated frequency	Hz	fifty
three	rated current	A	six hundred and thirty	one hundred and twenty-five
four	Lightning impulse withstand voltage	kV	Ground and phase to phase 75, isolation and disconnection 85
five	1-minute power frequency voltage	kV	Ground and phase 42, isolation and disconnection 48
six	Rated thermal stability current	kA	20(4S)
seven	Rated dynamic stable current	kA	fifty
eight	Rated closing current (peak value)	kA	fifty	fifty
nine	Rated short-circuit breaking current (expected value)	kA		thirty-one point five
ten	Maximum 1 �O· t when temporarily disconnecting current	A²S		According to the characteristic curve of the fuse
eleven	Minimum breaking current	kA		According to the characteristic curve of the fuse
twelve	Rated transfer current	kA		one point five
thirteen	Maximum breaking current (reference value)	kA	one point eight
fourteen	Disconnect the capacity of the no-load transformer	kva	one thousand two hundred and fifty
fifteen	Rated cable charging current	A	ten
sixteen	Rated active load current breaking times	time	>100
seventeen	Rated active load current switch opening time	S		>0.06
eighteen	Grounding switch thermal stability current	kA	20(2S)	20(2S)
nineteen	Stable current (peak value) of grounding switch	kA	fifty	fifty
twenty	Electric motor operating power supply voltage	V	AC/DC 100, 220

Mechanical characteristic parameters

serial number	project	unit	FKN16-12D/630	FKRN16-12D/125
one	Total travel of moving contact	mm	200 +8 -2
two	Intermediate distance between phases (before energy storage of the mechanism)	mm	210±3
three	Moving contact overtravel	mm	40±2
four	Auxiliary hoe opening distance	mm	one hundred and fifty
five	Synchronization of three-phase opening and closing	ms	<3
six	Just divided speed	ms	>2.8	>2.8
seven	Just closed speed	ms	>3.8
eight	Distance between metal valve and conductive tube	mm	>125
nine	Grounding switch fracture distance	mm	>150
ten	main circuit resistance	�̦�	<120	<300
eleven	Maximum operating force distance	Nm	<160

FKRN16-12D High Voltage Load Switch

[Indoor high-voltage load switch]FN12-12RD High voltage load switch

2026-6-19 19:35:43

FN12-12D/630-50 indoor AC high voltage load switch (hereinafter referred to as FN12-12D load switch) is a three-phase high voltage starting device with a rated voltage of 12kV and a rated frequency of 50Hz. It is used for switching load current, closed-loop current, no-load transformer and cable charging current, and switching short-circuit current. Load switches equipped with grounding switches can withstand short-circuit currents.
The FN12-12RD/125-31.5 AC high voltage load starting fuse combination (hereinafter referred to as FN12-12 (R) D combination) is an indoor high voltage switchgear that combines the FN12-12RD load switch with the S-port LAJ (XRNT port-10) high voltage current limiting fuse. It can disconnect any current up to the short-circuit current; The load switch disconnects the working current, the fuse disconnects the short-circuit current, and jointly disconnects any current between the working current and the full short-circuit current. At the same time, the fuse causes the load switch to open through its impact.

Scope of application
The FN12-12RD/load switch FN12-12RD combination electrical device is mainly used for load control and short-circuit protection in urban distribution stations and industrial electrical equipment powered by three-phase ring networks or terminals. Due to the more reliable protective effect of composite appliances on electrical equipment such as transformers than using circuit breakers, they are particularly suitable for ring networks, radiation replacement units, and box type substations.

Normal working environment
Using ambient air temperature: upper limit+40 ��, lower limit -25 ��;
Altitude not exceeding 1000M;
Relative humidity, with a daily average not exceeding 95% and a monthly average not exceeding 90%;
The surrounding air should not be significantly polluted by corrosive or flammable gases and water vapor;
No frequent vigorous exercise;
Pollution resistance level: Level II;
If the usage conditions exceed the above regulations, it shall be determined through consultation between the user and the manufacturer.

Technical parameters and performance of FN12-12RD high-voltage load switch

serial number	project	unit	FN12-12D/630	FN12-12RD/125
one	rated voltage	kV	twelve
two	rated frequency	Hz	fifty
three	rated current	A	six hundred and thirty	one hundred and twenty-five
four	Lightning impulse withstand voltage	kV	Ground and phase to phase 75, isolation and disconnection 85
five	1-minute power frequency voltage	kV	Ground and phase 42, isolation and disconnection 48
six	Rated thermal stability current	kA	20(4S)
seven	Rated dynamic stable current	kA	fifty
eight	Rated closing current (peak value)	kA	fifty	fifty
nine	Rated short-circuit breaking current (expected value)	kA		thirty-one point five
ten	Maximum 1 �O· t when temporarily disconnecting current	A²S		According to the characteristic curve of the fuse
eleven	Minimum breaking current	kA		According to the characteristic curve of the fuse
twelve	Rated transfer current	kA		one point five
thirteen	Maximum breaking current (reference value)	kA	one point eight
fourteen	Disconnect the capacity of the no-load transformer	kva	one thousand two hundred and fifty
fifteen	Rated cable charging current	A	ten
sixteen	Rated active load current breaking times	time	>100
seventeen	Rated active load current switch opening time	S		>0.06
eighteen	Grounding switch thermal stability current	kA	20(2S)	20(2S)
nineteen	Stable current (peak value) of grounding switch	kA	fifty	fifty
twenty	Electric motor operating power supply voltage	V	AC/DC 100, 220

Mechanical characteristic parameters of FN12-12RD high-voltage load switch

serial number	project	unit	FN12-12RD/630	FN12-12RD/125
one	Total travel of moving contact	mm	200 +8 -2
two	Intermediate distance between phases (before energy storage of the mechanism)	mm	210±3
three	Moving contact overtravel	mm	40±2
four	Auxiliary hoe opening distance	mm	one hundred and fifty
five	Synchronization of three-phase opening and closing	ms	<3
six	Just divided speed	ms	>2.8	>2.8
seven	Just closed speed	ms	>3.8
eight	Distance between metal valve and conductive tube	mm	>125
nine	Grounding switch fracture distance	mm	>150
ten	main circuit resistance	�̦�	<120	<300
eleven	Maximum operating force distance	Nm	<160

FN12-12RD High Voltage Load Switch

[Indoor high-voltage load switch]FKN12A-12D series load switch

2026-6-19 19:35:35

FKN12A-12D compressed air load switch and FKRN12A-12D series compressed air load switch fuse combination device are new series of switchgear developed by our company, suitable for controlling and protecting power equipment such as transformers, cables, overhead lines, etc. in three-phase distribution systems of 12KV and below; Specially suitable for terminal substations and box type substations in urban and rural power grids, as well as for control and protection of ring networks and dual radiation power supply units The FKN12A-12D series compressed air load switch can switch between load current and overload current FKRN12A-12D series compressed air load switch fuse combination device can switch load current, overload current, and short-circuit current of the circuit. 1-2 This series of products has the characteristics of compact structure, reasonable design, reliable interlocking, and high insulation level. Its switching and closing adopt vertical direct action mode; The opening and closing speed of the spring energy storage operating mechanism is not affected by the magnitude of the operator's operating force; The arc is extinguished inside the bell shaped insulation cover, and the free gas during arc ignition will not cause a decrease in the insulation strength between phases or to ground An organic transparent insulation cover is installed between the bell shaped cover and the support (i.e. between the switch isolation fracture) to completely isolate the charged body and improve the protection level of the ring main unit Reliable mechanical interlocks are installed between the load switch and the grounding switch, and mechanical interlocks between the switch panel and the cabinet are also installed on the switch panel. These interlocks are simple and effective, ensuring that there will be no misoperation or accidental contact with live parts

The FKN12A-12D series load switch adopts copper tungsten alloy arc contacts and plum blossom shaped main contacts, which make the switch conductive reliably, have a long electrical life, easy maintenance, convenient operation, and reliable operation. It is highly praised by users

The design and manufacturing of FKN12A-12D series load switches comply with the following standards: GB3804<<3-63KV AC high voltage load switches>>GB16926<>GB1985<>IEC665<>IEC420<>

Technical parameters of FKN12A-12D series load switch
FKN12A-12D series load switch, FKRN12A-12D series load switch - fuse combination electrical device technical parameter number name unit FKN12A-12D FKRN12A-12D
1 Rated voltage KV 12 12
Rated frequency Hz 50 50
3 Rated current A 630 125
4 rated insulation level 1 mm power frequency withstand voltage to ground, phase to phase KV 42
Isolation fracture 48 48
Lightning withstand voltage (peak) to ground, phase to phase 75 75
Isolation fracture 85 85
5 rated short-circuit withstand current (thermal stability current) load switch KA 20 grounding switch 20
6 rated short-circuit duration (thermal stability time) load switch S 4 grounding switch 2
7 rated short-circuit closing current (peak) KA 50
8 rated breaking current active load breaking current A 630
Closed loop disconnect power supply 630 5% active load disconnect current 31.5 cable charging current 10 disconnect no-load transformer capacity 1250
Rated short-circuit switch breaking current (current limiting fuse) KA 31.5
10 rated transfer current A 1200
11 Mechanical service life 2000 2000 4-2 Mechanism characteristics are shown in Table 2: Serial number name Unit data
1. Fracture moment mm �� 150
The center distance between two phases is 210 ± 2
3 phase air gap �� 125
4 strokes 210 ± 4
5 overtravel �� 41
6. Three phase closing with different synchronization ms �� 10
7. Three phase closing with different periods �� 5
The inherent opening time of the 8-point excitation release is 40-65
9. Main circuit resistance U �� 300 4-3 FKRN12A-12D series load switch - selection of rated current of current limiting fuse for fuse combination electrical equipment. The reference number for transformer capacity selection is shown in Table 3. Transformer capacity (KVA) 100 125 160 200 250 300/315 400 500 630 750/800 1000 1250
Rated current of fuse (A) 16 16 20 25 31.5 40 50 63 60 80 100 100 125
4-4 Optional attachments are shown in Table 4. Main parameters for user selected attachments
Electric operating mechanism
The compressed air switch can be equipped with an electric operating mechanism for remote control of opening and closing Rated voltage: AC220V, DC220V, DC48V, DC24V
Rated current: 0.8A 3.6A 7.2A
Rated power: 120W
Energy storage time: 2-4 seconds
Work schedule: S2/1min
Rated voltage of shunt release: AC220V
Internal resistance: 32
Overcurrent release 5A
Auxiliary contact
Both load switch and grounding switch can be optionally equipped with a maximum withstand voltage of AC500V
Maximum allowable current value: 5A
Standing auxiliary contacts: one open one closed, two open two closed, three open three closed, four open four closed
Interlocking head between switch cabinets
This series of load switches can be equipped with specially designed interlocking heads to achieve interlocking between two load switches with interlocking heads. If one switch is opened, the other switch will automatically close, and the interlocking head cannot be removed after closing

5. FKN12A-12D series load switch appearance and installation dimensions
FKN12A-12D load switch appearance, installation dimensions, and installation methods are shown in Figure 1, Figure 2, and Figure 3. Note: Figure 1 shows the left side installation operation, and the side inverted left operation; Side inverted left operation, side mounted left operation Figure 2 shows the front left operation and the front inverted operation Figure 3 shows the front installation left operation and the front inverted left operation. The appearance, installation dimensions, and installation method of the 5-2 FKRN12A-12D series compressed air load switch fuse combination device are shown in Figure 4. Figures 5, 6, and 7 show the external dimensions and installation method of the electric mechanism, as shown in Figure 8. Note: Figure 4 shows the side installation left operation and the side inverted left operation; Side inverted left operation, side mounted left operation Figure 5 shows the front right operation and the front inverted right operation Figure 6 shows the left operation for front installation and the left operation for front inversion Figure 7 is a schematic top view of the right operation installation for front installation. Figure 5-3 shows the installation of switches, panel interlocking, and hole opening. Figure 9.6. Packaging, lifting, and unpacking inspection. 6-1 Packaging, lifting requirements: The load switch should be packaged as a single unit when it leaves the factory. When lifting is needed during transportation, it should be carried out according to the position marked on the outside of the packaging box. 6-2 Unpacking inspection: After receiving the product, the user should immediately inspect the packaging and transportation of the switch to see if there is any damage, damaged accessories, and whether they match the packing list; Check if the product model and specifications are the same as the order. 6-3 Factory Document Main Attachment A) Installation and Use Manual;
B) Product qualification certificate;
C) Product factory test records;
D) Packing list;
E) Schematic diagram of switch wiring;
F) Operating handle;
G) Interlocking head of cabinet door; 6-4 Storage
The product should be stored indoors in a well ventilated, dry environment without severe vibration or corrosive gases. It should be protected from rain, moisture, and direct sunlight. Before installation, the product should be checked for completeness and loose fasteners
B) The installation surface of the switchgear must be in good contact with the installation surface of the switch. If there is a gap, a gasket must be added to level it. Do not forcefully lock it with fasteners
C) The installation dimensions of the busbar connected to the switch inlet and outlet must be accurate and cannot be forcibly pulled or tightened. 8. When maintaining the fuse to break and impact the circuit breaker, it is necessary to replace the three-phase fuse with the same model and specification. 9. Ordering instructions: Users should indicate the model FKN12A-12 FKN12A-12D FRKN12A-12D when ordering
Installation method: Side mounted, front mounted, inverted
Operation mode: manual electric
Operation direction: left operation, right operation
Partial excitation trip (rated voltage) 110V 220V
Auxiliary switches 4a 4b

Note: When using a lower incoming line, the load switch is not equipped with a grounding knife. Please specify when ordering When the two incoming load switches adopt mechanical interlocking or program interlocking, please specify when ordering

[Indoor high-voltage load switch]FZB21-12D/T630-20 Indoor High Voltage Vacuum Load Switch

2026-6-19 19:35:26

FZB21-12D/T630-20 indoor high-voltage vacuum load switch (hereinafter referred to as load switch) is a three-phase AC 50Hz household device. In the rated voltage 12KV power system, it serves as the protection and control of electrical facilities, used for breaking and closing load currents, closed-loop currents, and carrying overload currents. It can also open and close no-load long lines, no-load transformers, and capacitors.
Install a grounding switch with the ability to close short-circuit currents.
The operating mechanism can be manually or electrically operated, facilitating the remote control requirements of the power system.

The FZRN21-12D/T125-31.5 indoor high-voltage vacuum load switch fuse combination device (hereinafter referred to as the combination device) is composed of a load switch and a fuse. In addition to the function of a load switch, it also has a short-circuit protection function.
In the Chinese market, load switches have gradually replaced circuit breakers and have been widely used. Compared with circuit breakers, load switches are not only cheaper and easier to operate, but also have faster fault response when equipped with fuses, which is particularly effective in protecting transformers. Load switches have been favored by urban and rural users and are increasingly valued and welcomed by people.
2. Normal usage conditions
a) Surrounding air temperature: upper limit+40oC, lower limit -40oC;
b) Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%;
c) Water vapor pressure: daily average not exceeding 2.2kPa, monthly average not exceeding 1.8kPa;
d) A place without fire, explosion hazard, serious pollution, chemical corrosion, and severe vibration.

3 Main Technical Parameters
3.1 Main technical parameters of load switch

serial number	parameter name		unit	data
one	rated voltage		kV	twelve
two	rated frequency		Hz	fifty
three	rated current		A	six hundred and thirty
four	Rated Active load breaking current			six hundred and thirty
five	Rated closed-loop breaking current			six hundred and thirty
six	5% rated active load breaking current			thirty-one point five
seven	Rated cable charging breaking current			ten
eight	Rated no-load transformer capacity		kVA	one thousand two hundred and fifty
nine	1-minute power frequency withstand voltage	Vacuum fracture, phase to phase, relative to ground	kV	forty-two
		isolation gap		forty-eight
ten	Lightning impulse withstand voltage (peak value)	Vacuum fracture, phase to phase, relative to ground		seventy-five
		isolation gap		eighty-five
eleven	4S rated short-time withstand current (thermal stability)		kA	twenty
twelve	Rated peak withstand current (dynamic stability)		kA	fifty
thirteen	Rated short-circuit closing current (peak)			fifty
fourteen	Rated current breaking times		time	ten thousand
fifteen	mechanical life			ten thousand
sixteen	Allowable wear thickness of vacuum arc extinguishing chamber contacts		mm	two
seventeen	Manual operating torque		N.m	��200

3.2 Technical parameters of composite electrical appliances

serial number	parameter name		unit	data
one	rated voltage		kV	twelve
two	rated frequency		Hz	fifty
three	Maximum rated current of fuse		A	one hundred and twenty-five
four	Rated breaking AC current		A	three thousand one hundred and fifty
five	The opening time of the switch triggered by the fuse		ms	40±5
six	Rated short-circuit breaking current (effective value)		kA	thirty-one point five
seven	Rated short-circuit breaking current (peak)		kA	fifty
eight	1-minute power frequency withstand voltage	Vacuum fracture, phase to phase, relative to ground	kV	forty-two
nine	1-minute power frequency withstand voltage	isolation gap		forty-eight
	Lightning impulse withstand voltage (peak value)	Vacuum fracture, phase to phase, relative to ground		seventy-five
ten	Lightning impulse withstand voltage (peak value)	isolation gap		eighty-five
	Fuse impactor output energy		J	2-5

3.3 Mechanical adjustment parameters

serial number	parameter name	unit	data
one	Contact opening distance/overtravel	mm	10±1/4±0.5
two	Average closing speed/average opening speed (contact just opened 6mm)	m/s	0.6±0.2/1.1±0.2
three	Synchronization of three-phase contact opening and closing/contact closing bounce time	ms	��2/��2
four	Distance between charged bodies and air to ground	mm	��125
five	Main circuit resistance of upper and lower brackets	�̦�	��70

4. FZB21-12D/T630-20 Indoor High Voltage Vacuum Load Switch Appearance and Installation Dimensions

FZB21-12D/T630-20 Indoor High Voltage Vacuum Load Switch

[Indoor high-voltage load switch]FN3-12R,FN3-15R/400A series high-voltage load switch

2026-6-19 19:35:17

Technical parameters of FN3-12R, FN3-15R/400A series high-voltage load switch:

Rated voltage (kV) 12; fifteen
Rated current (A) 400
Power frequency withstand voltage (kV) 42; fifty
Lightning impulse withstand voltage (kV) 75
Rated short-circuit closing current (peak) (kA) 31.5
Rated short-time withstand current (kA) 12.5 (4S)
Rated peak short-time withstand current (kA) 31.5
Rated breaking current (A) 400
Mechanical lifespan (times) 2000

FN3-12R, FN3-15R/400A series high-voltage load switch

[Indoor high-voltage load switch]NAL12,NALF12 type load switch

2026-6-19 19:35:09

NAL12 load switch and NALF12 load switch fuse combination device are high-voltage performance load switches that combine compressed air arc extinguishing and gas arc extinguishing.

Combination electrical appliances combine the advantages of load switches and fuses. Any load current from the load switch to its rated breaking current is disconnected by the fuse and its impactor, and any overcurrent is disconnected until the rated short-circuit breaking current of the combination electrical appliance is reached.

Load switches and combination devices are widely used in distribution networks as switches for transformers, motors, or capacitors.

[Indoor high-voltage load switch]FN11-12RD series high-voltage load switch

2026-6-19 19:34:59

FN11-12/630-20 indoor AC high voltage load switch (hereinafter referred to as FN11-12D load switch) is a three-phase high voltage starting device with a rated voltage of 12kV and a rated frequency of 50Hz. It is used for switching load current, closed-loop current, no-load transformer and cable charging current, and switching short-circuit current. Load switches equipped with grounding switches can withstand short-circuit currents.
FN11-12RD/125-31.5 AC high voltage load starting fuse combination (hereinafter referred to as FN11-12 (R) D combination) is an indoor high voltage switchgear that combines FN1112RD load switch with S-port LAJ (XRNT port-10) high voltage current limiting fuse. It can disconnect any current up to the short-circuit current; The load switch disconnects the working current, the fuse disconnects the short-circuit current, and jointly disconnects any current between the working current and the full short-circuit current. At the same time, the fuse causes the load switch to open through its impact.

Scope of application of FN11-12RD series high-voltage load switch
The FN11-12D/load switch FN11-12RD combination electrical device is mainly used for load control and short-circuit protection in urban distribution stations and industrial electrical equipment powered by three-phase ring networks or terminals. Due to the more reliable protective effect of composite appliances on electrical equipment such as transformers than using circuit breakers, they are particularly suitable for ring networks, radiation replacement units, and box type substations.

Normal working environment
Using ambient air temperature: upper limit+40 ��, lower limit -25 ��;
Altitude not exceeding 1000M
Relative humidity, with a daily average not exceeding 95% and a monthly average not exceeding 90%;
The surrounding air should not be significantly polluted by corrosive or flammable gases and water vapor;
No frequent vigorous exercise;
Pollution resistance level: Level II;
If the usage conditions exceed the above regulations, it shall be determined through consultation between the user and the manufacturer.

Technical parameters and performance of FN11-12RD series high-voltage load switch

serial number	project	unit	FN11-12D/630	FN11-12RD/125
one	rated voltage	kV	twelve
two	rated frequency	Hz	fifty
three	rated current	A	six hundred and thirty	one hundred and twenty-five
four	Lightning impulse withstand voltage	kV	Ground and phase to phase 75, isolation and disconnection 85
five	1-minute power frequency voltage	kV	Ground and phase 42, isolation and disconnection 48
six	Rated thermal stability current	kA	20(4S)
seven	Rated dynamic stable current	kA	fifty
eight	Rated closing current (peak value)	kA	fifty	fifty
nine	Rated short-circuit breaking current (expected value)	kA		thirty-one point five
ten	Maximum 1 �O· t when temporarily disconnecting current	A²S		According to the characteristic curve of the fuse
eleven	Minimum breaking current	kA		According to the characteristic curve of the fuse
twelve	Rated transfer current	kA		one point five
thirteen	Maximum breaking current (reference value)	kA	one point eight
fourteen	Disconnect the capacity of the no-load transformer	kva	one thousand two hundred and fifty
fifteen	Rated cable charging current	A	ten
sixteen	Rated active load current breaking times	time	>100
seventeen	Rated active load current switch opening time	S		>0.06
eighteen	Grounding switch thermal stability current	kA	20(2S)	20(2S)
nineteen	Stable current (peak value) of grounding switch	kA	fifty	fifty
twenty	Electric motor operating power supply voltage	V	AC/DC 100, 220

FN11-12RD series high-voltage load switch mechanical characteristic parameters

serial number	project	unit	FN11-12D/630	FN11-12RD/125
one	Total travel of moving contact	mm	200 +8 -2
two	Intermediate distance between phases (before energy storage of the mechanism)	mm	210±3
three	Moving contact overtravel	mm	40±2
four	Auxiliary hoe opening distance	mm	one hundred and fifty
five	Synchronization of three-phase opening and closing	ms	<3
six	Just divided speed	ms	>2.8	>2.8
seven	Just closed speed	ms	>3.8
eight	Distance between metal valve and conductive tube	mm	>125
nine	Grounding switch fracture distance	mm	>150
ten	main circuit resistance	�̦�	<120	<300
eleven	Maximum operating force distance	Nm	<160

[Indoor high-voltage load switch]FZRN23-12D High voltage vacuum load switch

2026-6-19 19:34:50

Overview
FZN23-12 series vacuum load switch and combination device, suitable for three-phase AC 50Hz. 10kV distribution system. It has the advantages of no pollution, no fire and explosion hazards, and can be operated frequently. It can be used as the main component of ring main units, box type substations or other types of switchgear, for the control and protection of power equipment such as transformers, cables, overhead lines, etc. It is widely used in power distribution systems such as factories, residential areas, high-rise buildings, schools, parks, etc.

Environmental conditions for use
Altitude not exceeding 1000M;
Environmental temperature: maximum+40 ��; Minimum -15 ��;
Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%;
Environmental conditions: No corrosive gases, flammable gases, obvious water vapor, and no frequent severe vibrations.

Main electrical and mechanical parameters of vacuum load switch and its combination electrical equipment

Table 1 Technical Parameters of Load Switches

serial number	name		unit	data
				load switch	combined electrical apparatus
one	rated voltage		kV	twelve
two	Rated insulation level	Power frequency withstand time, ground/isolation fracture	kV	42/48
		Thunder ground impact requires relative pressure to the ground/isolation fracture	kV	75/85
three	rated current		A	630/800 125
four	Rated active load breaking current, rated closed-loop breaking current		A	630/800 125
five	Rated short-time withstand current (2S)		kA	twenty
six	Rated short-circuit closing current, rated peak withstand current		kV	fifty
seven	Rated cable charging breaking current		A	twenty-five
eight	Rated open circuit no-load transformer		kVA	1600 1600
nine	Rated breaking and handover current		A	- 2000
ten	Rated short-circuit breaking current of fuse		kA	- 31.5
eleven	mechanical life		time	5000 5000
twelve	Total breaking time		Ms	not more than 100
thirteen	Overload breaking capability		A	five thousand

Table 2 Technical Parameters of Load Switches

serial number	name	unit	numerical value	remark
one	Interphase center distance	mm	210±3
two	contact gap	mm	10±1
three	Contact itinerary	mm	3±1
four	Three phase closing asynchrony	ms	<2
five	Three phase closing asynchrony	ms	<2
six	Bouncing time of closing contact	ms	<2
seven	Average closing speed	m/s	0.6±0.2
eight	Average opening speed	m/s	1.0±0.2
nine	Accumulated allowable wear thickness of moving contact	mm	three
ten	Open distance between dynamic and static contacts	mm	>160

FZRN23-12D High Voltage Vacuum Load Switch

[Indoor high-voltage load switch]FKRN12-12D Wall mounted high voltage load switch

2026-6-19 19:34:41

FKN12-12/630-50 indoor AC high voltage load switch (hereinafter referred to as FN12-12D load switch) is a three-phase high voltage starting device with a rated voltage of 12kV and a rated frequency of 50Hz. It is used for switching load current, closed-loop current, no-load transformer and cable charging current, and switching short-circuit current. Load switches equipped with grounding switches can withstand short-circuit currents.

FKRN12-12D/100-31.5 AC high voltage load starting fuse combination (hereinafter referred to as FN12-12 (R) D combination) is an indoor high voltage switchgear that combines FKNRN12-12D load switch with S-port LAJ (XRNT port-10) high voltage current limiting fuse. It can disconnect any current up to the short-circuit current; The load switch disconnects the working current, the fuse disconnects the short-circuit current, and jointly disconnects any current between the working current and the full short-circuit current. At the same time, the fuse causes the load switch to open through its impact.

Scope of application
The FKN12-12D/load switch FKRN12-12D combination electrical device is mainly used for load control and short-circuit protection in urban distribution stations and industrial electrical equipment powered by three-phase ring networks or terminals. Due to the more reliable protective effect of composite appliances on electrical equipment such as transformers than using circuit breakers, they are particularly suitable for ring networks, radiation replacement units, and box type substations.

Normal working environment
Using ambient air temperature: upper limit+40 ��, lower limit -25 ��;
Altitude not exceeding 1000M
Relative humidity, with a daily average not exceeding 95% and a monthly average not exceeding 90%;
The surrounding air should not be significantly polluted by corrosive or flammable gases and water vapor;
No frequent vigorous exercise;
Pollution resistance level: Level II;
If the usage conditions exceed the above regulations, it shall be determined through consultation between the user and the manufacturer.

Technical parameters and performance

serial number	project	unit	FKN12-12D/630	FKRN12-12D/100
one	rated voltage	kV	twelve
two	rated frequency	Hz	fifty
three	rated current	A	six hundred and thirty	one hundred
four	Lightning impulse withstand voltage	kV	Ground and phase to phase 75, isolation and disconnection 85
five	1-minute power frequency voltage	kV	Ground and phase 42, isolation and disconnection 48
six	Rated thermal stability current	kA	20(4S)
seven	Rated dynamic stable current	kA	fifty
eight	Rated closing current (peak value)	kA	fifty	fifty
nine	Rated short-circuit breaking current (expected value)	kA		thirty-one point five
ten	Maximum 1 �O· t when temporarily disconnecting current	A²S		According to the characteristic curve of the fuse
eleven	Minimum breaking current	kA		According to the characteristic curve of the fuse
twelve	Rated transfer current	kA		one point five
thirteen	Maximum breaking current (reference value)	kA	one point eight
fourteen	Disconnect the capacity of the no-load transformer	kva	one thousand two hundred and fifty
fifteen	Rated cable charging current	A	ten
sixteen	Rated active load current breaking times	time	>100
seventeen	Rated active load current switch opening time	S		>0.06
eighteen	Grounding switch thermal stability current	kA	20(2S)	20(2S)
nineteen	Stable current (peak value) of grounding switch	kA	fifty	fifty
twenty	Electric motor operating power supply voltage	V	AC/DC 100, 220

Mechanical characteristic parameters of FKRN12-12D wall mounted high-voltage load switch

serial number	project	unit	FKN12-12D/630	FKRN12-12D/100
one	Total travel of moving contact	mm	200 +8 -2
two	Intermediate distance between phases (before energy storage of the mechanism)	mm	210±3
three	Moving contact overtravel	mm	40±2
four	Auxiliary hoe opening distance	mm	one hundred and fifty
five	Synchronization of three-phase opening and closing	ms	<3
six	Just divided speed	ms	>2.8	>2.8
seven	Just closed speed	ms	>3.8
eight	Distance between metal valve and conductive tube	mm	>125
nine	Grounding switch fracture distance	mm	>150
ten	main circuit resistance	�̦�	<120	<300
eleven	Maximum operating force distance	Nm	<160

FKRN12-12D Wall mounted High Voltage Load Switch

[Indoor high-voltage load switch]FZRN16A-12 series indoor vacuum load switch fuse combination electrical appliance

2026-6-19 19:34:32

The FZRN 16A-12 series indoor AC high-voltage vacuum load switch fuse combination device meets the international and national standards of GB3804-90 "3-63kV AC high-voltage load switch" and EC420 "AC high-voltage load switch fuse combination device" in terms of performance.

The FZRN16A-12 series indoor high-voltage vacuum load switch is suitable for use in 6-10kV three-phase AC 50Hz power grids as a means of breaking load currents and closing short-circuit currents. It is particularly suitable for places that require oil-free, non maintenance, and frequent operation.

This product has the advantages of independent partition port, low manual operation force, and can be equipped with two types of vacuum arc extinguishing chambers, ceramic tube or glass tube. It is an ideal product for oil-free high-voltage switches and equipment updates.

Main technical parameters of FZRN16A-12 series indoor vacuum load switch fuse combination electrical appliance

serial number	name	unit	parameter
one	rated voltage	kV	twelve
two	rated current	A	six hundred and thirty
three	Rated Active load breaking current	A	six hundred and thirty
four	Rated closed-loop breaking current	A	six hundred and thirty
five	5% rated active load breaking current	A	thirty-one point five
six	Rated cable charging breaking current	A	twelve
seven	Rated no-load transformer breaking current	A	No load current of 1250kVA transformer
eight	Lmin power frequency withstand voltage (effective value) to ground and phase to phase	kV	42/48
nine	Full wave lightning impulse withstand voltage (peak) to ground and phase to phase	kV	75/85
ten	Customer specified peak withstand current	kA	fifty
eleven	Rated short-time withstand current	kA/s	20/2
twelve	Rated short-circuit closing current	kA	fifty
thirteen	Rated current breaking times	time	ten thousand
fourteen	mechanical life	time	ten thousand
fifteen	Allowable cumulative thickness of contact wear	mm	three
sixteen	Interphase center distance	Mm	two hundred and ten
seventeen	Manual operation force distance	N.m	<100
eighteen	Dimensions: Width x Height x Depth	mm	700x800x300

Technical parameters for assembly and adjustment of vacuum arc extinguishing chamber

serial number	name	unit	parameter
one	contact gap	mm	8+1
two	Contact itinerary	mm	3+1
three	Average closing speed	m/s	0.6±0.2
four	Average opening speed	m/s	1±0.2
five	Non synchronous opening and closing of three-phase contacts	ms	��2
six	Contact closing bounce time	ms	��2
seven	Distance between charged bodies and relative ground	mm	��125
eight	Main circuit resistance between upper and lower brackets	�̦�	��60

[Indoor high-voltage load switch]FZ(R)N21-12D Indoor vacuum load switch fuse combination electrical appliance

2026-6-19 19:34:24

FZN21-12D/T630-20, FZN21-12DR/T125-31.5 high-voltage vacuum load switches and combination devices are used in three-phase AC 10KV, 50Hz distribution systems. It has the advantages of compact structure, small size, light weight, long service life, strong closing and breaking ability, safety and reliability. When used in conjunction with fuses (referred to as combination appliances), it can replace expensive circuit breakers, and its operation and maintenance are simple and convenient.

[Indoor high-voltage load switch]FZRN25-12 series vacuum load switch

2026-6-19 19:34:15

FZN25 and FZRN25 vacuum load switches and combination devices are suitable for use in three-phase AC 50Hz ring networks or terminal power supply and industrial electrical equipment for load control and short-circuit protection. The load switch is used for load switching, closed-loop current, no-load transformer, and cable charging current. Combination appliances can disconnect any current up to the rated short-circuit current. Adopting direct action isolation fracture and vacuum arc chamber linkage. It has manual and electric functions.
The unique transmission structure design of FZN25 and FZRN25 allows the arc extinguishing chamber to only withstand high voltage at the moment of closing and opening, resulting in small size and low price.
FZN25 and FZRN25 can achieve one-time operation of isolating the fracture surface and extinguishing chamber fracture surface.
FNZ25 and FZRN25 have grounding valves that are interlocked with the grounding switch between the static contact and the moving conductor, ensuring safety and facilitating maintenance.

[Indoor high-voltage load switch]FKN12-12D/630-20 Indoor AC High Voltage Load Switch

2026-6-19 19:34:06

FKN12-12D/630-20 indoor AC high voltage load switch (hereinafter referred to as FKN12-12D load switch) is a three-phase high voltage switchgear with a rated voltage of 12KV and a rated frequency of 50Hz, used for switching load current, closed-loop current, no-load transformer and cable charging current, and closing short-circuit current. Load switches equipped with grounding switches can withstand short-circuit currents.

FKN12-12D.R/100-31.5 indoor AC high voltage load switch fuse combination (hereinafter referred to as FKN12-12D.R combination) is an indoor high voltage switchgear that combines FKN12-12D load switch with S �� LAJ-12 (XRNT �� -12) high voltage current limiting fuse. It can reliably disconnect any current up to the short-circuit current: load switch disconnects the working current, fuse disconnects the short-circuit current, and jointly disconnects any overcurrent between the working current and the full short-circuit current, while the fuse opens the load switch through its impactor.

FKN12-12D/630-20 Indoor AC High Voltage Load Switch Model and Meaning

Normal working environment
1. Surrounding air temperature: upper limit+40 ��, lower limit -25 ��.
2. The altitude is 1000m and below.
3. Relative humidity: Monthly average not exceeding 90%, daily average not exceeding 95%.
4. The surrounding air should not be significantly polluted by corrosive or flammable gases, as well as steam gases.
5. No frequent vigorous exercise.
6. Pollution resistance level: Level II.
If the usage conditions exceed the above regulations, they shall be determined through consultation between the user and the manufacturer.

Technical parameters and performance of FKN12-12D/630-20 indoor AC high-voltage load switch

serial number	project	unit	FKN12-12D/630-20	FKN12-12D.R/100-31.5
one	rated voltage	kV	twelve
two	rated frequency	Hz	fifty
three	rated current	A	six hundred and thirty	one hundred
four	Lightning impulse withstand voltage	kV	Ground and phase to phase 75, isolated and disconnected 85
five	1-minute power frequency withstand voltage	kV	To ground and phase 42, isolate and disconnect 48
six	Rated thermal stability current	kA	20��4S��
seven	Rated dynamic stable current	kA	fifty
eight	Rated closing current (peak value)	kA	fifty
nine	Rated short-circuit breaking current	kA		thirty-one point five
ten	Rated transfer current	kA		one point five
eleven	Maximum breaking current (reference value)	kA	one point eight
twelve	Disconnect the capacity of the no-load transformer	Kva	one thousand two hundred and fifty
thirteen	Rated cable charging current	A	ten
fourteen	Rated active load current breaking times	time	>100
fifteen	The time when the impactor triggers the load switch to open	S		>0.06
sixteen	Grounding switch thermal stability current	kA	20��2S��	20��2S��
seventeen	Grounding switch thermal stability current (peak)	kA	fifty	fifty
eighteen	Electric motor operating power supply voltage	V	AC220��DC48

Mechanical characteristic parameters

serial number	project	unit	FKN12-12D/630-20	FKN12-12D.R/100-31.5
one	Auxiliary contact opening distance	mm	>155
two	Synchronization of three-phase opening and closing	ms	<3
three	Just divided speed	m/s	>2.8	two point eight₀^+0.4
four	Just closed speed	m/s	>3.8
five	Grounding switch fracture distance	mm	145 ± 5
six	main circuit resistance	�̦�	<120	<300
seven	Maximum operating force distance	N.m	<160	<180

Main technical parameters

serial number	Model number		Rated current for melting (A)	Capacity of transformer (kVA)
serial number	UK model	National standard model	Rated current for melting (A)	Capacity of transformer (kVA)
one	SDLAJ-12	XPNT��-12	sixteen	100��125��160
two			twenty	two hundred
three			twenty-five	two hundred and fifty
four			thirty-one point five	three hundred and fifteen
five			forty	four hundred
six	SFLAJ-12		fifty	five hundred
seven			sixty-three	630��800
eight			eighty	one thousand
nine	SSLAJ-12		one hundred	one thousand two hundred and fifty
ten	SKLAJ-12		one hundred and twenty-five	one thousand and six hundred

Outline and installation dimension diagram

FKN12-12D/630-20 Indoor AC High Voltage Load Switch

[Indoor high-voltage load switch]FZN21-12D/T630-20 Indoor High Voltage Vacuum Load Switch

2026-6-19 19:33:57

The ZFN21-12D/T630-20 indoor high-voltage vacuum load switch is a three-phase AC 50Hz indoor high-voltage switchgear suitable for distribution systems with a rated voltage of 12kV. The ability of switchgear to close, carry, disconnect loads and overload currents; It can also disconnect and close no-load long lines, no-load transformers, and capacitors.
ZFN21-12DR/T125-31.5 indoor high-voltage vacuum load switch - fuse combination electrical device, is composed of this load switch and fuse, and has protection function in addition to the above functions.

·Environmental conditions for use
1. Surrounding air temperature:+40 �� -10 ��;
2. Altitude not exceeding 1000m;
3. Relative humidity: no more than 90% in indoor areas (+25 ��);
4. In an environment without conductive dust;
5. Objects without corrosive gases that damage metals and insulation;
6. Places without severe vibrations and impacts;
7. In an environment without the danger of combustion and explosion.

Technical parameters of FZN21-12D/T630-20 indoor high-voltage vacuum load switch
1. Main technical parameters of load switch:

serial number	project	unit	numerical value
one	rated voltage	kV	twelve
two	rated frequency	Hz	fifty
three	rated current	A	six hundred and thirty
four	Rated Active load breaking current	A	six hundred and thirty
five	Rated closed-loop breaking current	A	six hundred and thirty
six	5% rated active load breaking current	A	thirty-one point five
seven	Rated cable charging breaking current	A	ten
eight	Rated no-load transformer capacity	kVA	one thousand two hundred and fifty
nine	1-minute power frequency withstand voltage: (vacuum break, phase to phase, relative ground/isolation break)	kV	42/48
ten	Lightning impulse withstand voltage: (vacuum break, phase to phase, relative ground/isolation break)	kV	75/85
eleven	Rated short-time withstand current (thermal stability)	kA/S	20/4
twelve	Rated peak withstand current (thermal stability)	kA	five
thirteen	Rated short-circuit closing current	kA	fifty
fourteen	Rated current breaking times	time	ten thousand
fifteen	mechanical life	time	ten thousand
sixteen	Allowable wear thickness of vacuum arc extinguishing chamber contacts	mm	two
seventeen	Manual operation force distance	Nm	��200

2. Main technical parameters of FZN21-12D/T630-20 indoor high-voltage vacuum load switch combination electrical device:

serial number	project	unit	numerical value
one	rated voltage	kV	twelve
two	rated frequency	Hz	fifty
three	Maximum rated current of fuse	A	one hundred and twenty-five
four	Rated breaking and handover current	A	three thousand one hundred and fifty
five	The opening time of the switch triggered by the fuse	ms	40±5
six	Rated short-circuit breaking current (effective value)	kA	thirty-one point five
seven	Rated short-circuit closing current (peak)	kA	fifty
eight	1-minute power frequency withstand voltage: (vacuum break, phase to phase, relative ground/isolation break)	kV	42/48
nine	Lightning impulse withstand voltage: (vacuum break, phase to phase, relative ground/isolation break)	kV	75/85
ten	Fuse impactor output ± energy

[Indoor high-voltage load switch]AAB Type Load Switch (AAB Type Manual)

2026-6-19 19:33:49

The FLN48-12 (AAB manual) sulfur hexafluoride load switch is suitable for use in three-phase AC 50Hz, rated voltage 12kV ring network power supply or double amplitude radiation power supply systems. It is used to turn on and off load currents and overload currents, and can also be used to turn on and off no-load long lines, no-load transformers, and capacitor banks. The series combination of load switch and current limiting fuse can be used instead of circuit breaker, that is, the load switch is responsible for closing and breaking various load currents, while the current limiting fuse is responsible for breaking larger overload currents and short-circuit currents.

1. FLN48-12 load switch (AAB manual) features:
Double break, three station, rotating moving contact.
2. Good insulation performance, the load switch is sealed with upper and lower shells cast with epoxy resin, and filled with 0.045mpa SF6 gas inside. The main circuit and grounding circuit system are all placed inside the shell.
3. Good safety performance. If an internal arc occurs and there is a weak structural point at the rear of the casing, it will be blown open. Subsequently, the arc relief valve on the cabinet will be opened and the overpressure airflow will be directed outside the cabinet.
4. Both manual and electric operation are available, with convenient and reliable operation.
Three phase overall installation, good periodicity, few components, easy adjustment and installation, simple and feasible. Maintenance free, long lifespan.

[Indoor high-voltage load switch]FLN36-12 type load switch (electric, two position)

2026-6-19 19:33:40

The FLN36-12 sulfur hexafluoride load switch is suitable for use in three-phase AC 50Hz, rated voltage 12kV ring network power supply or double amplitude radiation power supply systems. It is used to turn on and off load currents and overload currents, and can also be used to turn on and off no-load long lines, no-load transformers, and capacitor banks. The series combination of load switch and current limiting fuse can be used instead of circuit breaker, that is, the load switch is responsible for closing and breaking various load currents, while the current limiting fuse is responsible for breaking larger overload currents and short-circuit currents.
1. Features: Double break, three station, rotating moving contact.
2. Good insulation performance, the load switch is sealed with upper and lower shells cast with epoxy resin, and filled with 0.045mpa SF6 gas inside. The main circuit and grounding circuit system are all placed inside the shell.
3. Good safety performance. If an internal arc occurs and there is a weak structural point at the rear of the casing, it will be blown open. Subsequently, the arc relief valve on the cabinet will be opened and the overpressure airflow will be directed outside the cabinet.
4. Both manual and electric operation are available, with convenient and reliable operation.

FLN36-12 load switch (electric, two position) three-phase overall installation, good periodicity, few parts, easy adjustment and installation, simple and easy to implement. Maintenance free, long lifespan.

[Indoor high-voltage load switch]FLN36-12 type load switch (manual, three position)

2026-6-19 19:33:31

The FLN36-12 sulfur hexafluoride load switch is suitable for use in three-phase AC 50Hz, rated voltage 12kV ring network power supply or double amplitude radiation power supply systems. It is used to turn on and off load currents and overload currents, and can also be used to turn on and off no-load long lines, no-load transformers, and capacitor banks. The series combination of load switch and current limiting fuse can be used instead of circuit breaker, that is, the load switch is responsible for closing and breaking various load currents, while the current limiting fuse is responsible for breaking larger overload currents and short-circuit currents.

1. Features: Double break, three station, rotating moving contact.
2. Good insulation performance, the load switch is sealed with upper and lower shells cast with epoxy resin, and filled with 0.045mpa SF6 gas inside. The main circuit and grounding circuit system are all placed inside the shell.
3. Good safety performance. If an internal arc occurs and there is a weak structural point at the rear of the casing, it will be blown open. Subsequently, the arc relief valve on the cabinet will be opened and the overpressure airflow will be directed outside the cabinet.
4. Both manual and electric operation are available, with convenient and reliable operation.

Three phase overall installation, good periodicity, few components, easy adjustment and installation, simple and feasible. Maintenance free, long lifespan.

[Indoor high-voltage load switch]FLRN36-12 type load switch (electric, three position)

2026-6-19 19:33:22

The FLN36-12 sulfur hexafluoride load switch is suitable for use in three-phase AC 50Hz, rated voltage 12kV ring network power supply or double amplitude radiation power supply systems. It is used to turn on and off load currents and overload currents, and can also be used to turn on and off no-load long lines, no-load transformers, and capacitor banks. The series combination of load switch and current limiting fuse can be used instead of circuit breaker, that is, the load switch is responsible for closing and breaking various load currents, while the current limiting fuse is responsible for breaking larger overload currents and short-circuit currents.

1. FLRN36-12 load switch (electric, three position) features: double break, three position, rotating moving contact.
2. Good insulation performance, the load switch is sealed with upper and lower shells cast with epoxy resin, and filled with 0.045mpa SF6 gas inside. The main circuit and grounding circuit system are all placed inside the shell.
3. Good safety performance. If an internal arc occurs and there is a weak structural point at the rear of the casing, it will be blown open. Subsequently, the arc relief valve on the cabinet will be opened and the overpressure airflow will be directed outside the cabinet.
4. Both manual and electric operation are available, with convenient and reliable operation.
Three phase overall installation, good periodicity, few components, easy adjustment and installation, simple and feasible. Maintenance free, long lifespan.

[Indoor high-voltage load switch]FLN36-12H Type Linear SF6 Load Switch

2026-6-19 19:33:14

The "one" shaped SF6 load switch connection scheme combines a fully shielded cross joint with a European sleeve, giving the distribution box the advantages of full shielding, full insulation, full sealing, and resistance to various harsh conditions. It also has low cost, beautiful appearance, and small footprint.

FLN36-12H type straight SF6 load switch

[Indoor high-voltage load switch]ABB Sulfur hexafluoride load switch

2026-6-19 19:33:05

ABB sulfur hexafluoride load switch is suitable for three-phase AC 50Hz, rated voltage 12kV ring network power supply or double amplitude radiation power supply system, used for closing and breaking load current and overload current, and can also be used for closing and breaking no-load long lines, no-load transformers and capacitor banks. The series combination of load switch and current limiting fuse can be used instead of circuit breaker, that is, the load switch is responsible for closing and breaking various load currents, while the current limiting fuse is responsible for breaking larger overload currents and short-circuit currents.
1. Features: Double break, three station, rotating moving contact.
2. Good insulation performance, the load switch is sealed with upper and lower shells cast with epoxy resin, and filled with 0.045mpa SF6 gas inside. The main circuit and grounding circuit system are all placed inside the shell.
3. Good safety performance. If an internal arc occurs and there is a weak structural point at the rear of the casing, it will be blown open. Subsequently, the arc relief valve on the cabinet will be opened and the overpressure airflow will be directed outside the cabinet.
4. Both manual and electric operation are available, with convenient and reliable operation.

[Indoor high-voltage load switch]FLRN36-12 type load switch (electric, can be installed with European style cable head)

2026-6-19 19:32:56

The FLN36-12 sulfur hexafluoride load switch is suitable for use in three-phase AC 50Hz, rated voltage 12kV ring network power supply or double amplitude radiation power supply systems. It is used to turn on and off load currents and overload currents, and can also be used to turn on and off no-load long lines, no-load transformers, and capacitor banks. The series combination of load switch and current limiting fuse can be used instead of circuit breaker, that is, the load switch is responsible for closing and breaking various load currents, while the current limiting fuse is responsible for breaking larger overload currents and short-circuit currents.

1. FLRN36-12 load switch (electric, can be installed with European style cable head) features: double break, three position, rotating moving contact.
2. Good insulation performance, the load switch is sealed with upper and lower shells cast with epoxy resin, and filled with 0.045mpa SF6 gas inside. The main circuit and grounding circuit system are all placed inside the shell.
3. Good safety performance. If an internal arc occurs and there is a weak structural point at the rear of the casing, it will be blown open. Subsequently, the arc relief valve on the cabinet will be opened and the overpressure airflow will be directed outside the cabinet.
4. Both manual and electric operation are available, with convenient and reliable operation.

[Indoor high-voltage load switch]FN��-24 series indoor high-voltage load switch and fuse combination electrical appliances

2026-6-19 19:32:47

Technical data of FN �� -24 series indoor high-voltage load switch and fuse combination electrical equipment

serial number	explanation	unit	requirement	reference data
one	instruction		indoor type	Indoor
two	model
three	main circuit resistance
four	standard		IEC265	IEC 265
five	Temperature design is suitable for maximum temperature	Deg.C	+45	=50C
five	minimum temperature	Deg.C	-10	-25C
six	rated voltage	KV	twenty	twenty-four
seven	Maximum operating voltage	MskV	twenty-four	twenty-four
eight	rated frequency	Hz	fifty	fifty
nine	rated current	A	four hundred	six hundred and thirty
ten	Rated segment current	kA rms	sixteen ten	twenty ten
eleven	Rated peak current	kA peak	forty	fifty
twelve	Rated single circuit breaking capacity (capacity)	kA peak	forty	fifty
thirteen	Maximum breaking capacity	A rms	Acc.to IEC420	Acc.to IEC420
fourteen	Rated main load breaking current capacity (capacity)	A rms	Acc.to IEC420	six hundred and thirty
fifteen	Maximum main action load breaking capacity	A rms	sixteen	six hundred and thirty
sixteen	Rated closing and breaking capacity	A rms		six hundred and thirty
seventeen	Rated single pole breaking capacity	A rms	forty-five	six hundred and thirty
eighteen	Rated cable charging capacity	A rms	forty-five	fifty
nineteen	Grounding breaking capacity	A rms A rms A rms		fifty-five thirty-five
twenty	Withstand voltage at a power frequency of 50Hz	kA rms kA rms	fifty sixty	fifty-five sixty-five
twenty-one	Peak values of ground, phase to phase, and insulation voltage	kV peak kV peak	one hundred and twenty-five one hundred and forty-five	one hundred and forty-five one hundred and twenty-five
twenty-two	mechanical life			2500 operation
twenty-three	When any fuse is working, rotate (release) the operating mechanism of the load switch
twenty-four	Lever operating handle (up, down)
twenty-five	Energy storage operating mechanism using springs
twenty-six	Maximum torque during opening/closing	N.M. N.M.		sixty-four sixty-four
twenty-seven	Operating angle	Degree		eighty
twenty-eight	Operating Time	Ms		thirty-five
twenty-nine	Arc ignition time	Ms		twenty
thirty	Arc extinguishing chamber			Provided
thirty-one	Separate trip coil tripping type Operating voltage Input electrical energy	V W	two hundred and twenty	Epoxy 220v five hundred and fifty
thirty-two	Rated short-time current (impulse) of grounding switch accessories Withstand peak current Short circuit breaking ability power frequency withstand voltage (Lightning) impulse withstand voltage spacing	kA rms kA peak kA peak kV kV Mm	sixteen	25kA rms 50 kA peak 50kA peak fifty-five one hundred and twenty-five two hundred and seventy-five

FN �� -24 series indoor high-voltage load switch and fuse combination electrical appliance

[Indoor high-voltage load switch]ZFN22-12 series indoor AC high voltage load switch

2026-6-19 19:32:38

Overview
The ZFN22-12 series indoor high-voltage vacuum load switch is a self-developed product based on the FN5 type switch. It is mainly suitable for use in power grids with a rated voltage of 12KV and three-phase AC 50Hz, as a means of breaking load current and switch short-circuit current. The product retains the compact structure and easy installation and use of FN5 switch, and is equipped with a novel dedicated motor to form manual energy storage, closing, manual opening, and electric energy storage. The closing and opening functions of the switch are the preferred products for the new ring network design, and also provide the best solution for directly replacing vacuum load switches with original FN5 switch ring network cabinets.
Environmental conditions for use
1. Environmental temperature: upper limit+40oC, lower limit -25oC
2. Relative humidity: daily average value not exceeding 95%; Monthly average value �� 95%
3. The altitude shall not exceed 100mm;
4. There is no risk of fire, explosion, serious pollution, chemical byproducts, or places with severe vibrations.

ZFN22-12 series indoor AC high voltage load switch model meaning

Technical parameters of ZFN22-12 series indoor AC high voltage load switch

serial number	name	unit	parameter
one	rated voltage	KV	twelve
two	rated frequency	Hz	fifty
three	rated current	A	six hundred and thirty
four	Rated closed-loop breaking current	A	six hundred and thirty
five	Rated Active load breaking current	A	six hundred and thirty
six	5% rated active load breaking current	A	thirty-one point five
seven	Rated cable charging breaking current	A	ten
eight	Rated no-load transformer breaking current		1250KVA transformer no-load current
nine	Rated short-circuit closing current	KA	fifty
ten	Rated short-circuit peak withstand current	KA	fifty
eleven	4S rated thermal stability current	KA	twenty
twelve	Rated transfer current	A	three thousand one hundred and fifty
thirteen	1-minute power frequency withstand voltage	KA	forty-two
fourteen	Lightning impulse withstand voltage (peak value)	KA	seventy-five
fifteen	Mechanical lifespan	time	one thousand

Technical specifications

serial number	name	unit	parameter
one	contact gap	mm	8+1
two	Contact overtravel	mm	3±1
three	Three phase asynchronous opening and closing	ms	��2
four	Bouncing time of closing contact	ms	��2
five	Closing speed	m/s	0.6±0.2
six	Opening speed	m/s	1±0.2
seven	Main circuit resistance	�̦�	<150
eight	Opening time	s	>0.06
nine	Interphase center distance	mm	210±0.2

Outline drawing

1. Terminal introduction 2. Fixed screw hole 3. Isolation switch 4. Vacuum tube 5. Switch spindle 6. Impactor 7. Grounding knife shaft 8. Safety 9. Cabinet frame 10. Terminal extraction

[Indoor high-voltage load switch]FN16A-12D series indoor AC high-voltage vacuum load switch FN16A-12 FN16A-12D FN16A-12RD

2026-6-19 19:32:30

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[Indoor high-voltage load switch]ZFN16-12 series indoor AC high-voltage vacuum load switch

2026-6-19 19:32:21

Overview

The ZFN16-12 indoor AC high-voltage load switch fuse combination (hereinafter referred to as the "series switch") is independently designed and developed by our factory. The performance meets the requirements of international standards GB3804-90 "3-63KV AC High Voltage Load Switch" and IEC420 "AC High Voltage Load Switch Fuse Combination Apparatus" (1990 edition) and national standards (draft for approval), and has the advantages of safe and reliable breaking, long electrical life, frequent operation, basically no maintenance required when breaking and shifting current, and obvious isolation fracture. The load switch fuse combination device also has the function of protecting transformers from overload and preventing equipment from running in phase loss.

purpose

The ZFN16-12 series switch is suitable for use in power grids with rated voltage of 6-12KV three-phase AC 50Hz, as a means of breaking load current, overload current, and short-circuit current. It is particularly suitable for places that require oil-free, non maintenance, and frequent operation. This product can be used with CS6-I type operating mechanism and CS �� manual operating mechanism.

ZFN16-12 series indoor AC high-voltage vacuum load switch model meaning

Environmental conditions for use
a�� Altitude not exceeding 1000 meters;
b�� Upper limit of ambient air temperature+40oC lower limit -25oC;
c�� Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%;
d�� The surrounding air should not be significantly polluted by corrosive or flammable gases, water vapor, etc;
e�� No frequent vigorous exercise;

serial number	name	unit	parameter
one	rated voltage	KV	twelve
two	Maximum operating voltage	KV	twelve
three	rated frequency	Hz	fifty
four	rated current	A	six hundred and thirty
five	Rated Active load breaking current	A	six hundred and thirty
six	Rated closed-loop breaking current	A	six hundred and thirty
seven	5% rated active load breaking current	A	thirty-one point five
eight	Rated number of cable charging disconnections	A	ten
nine	Rated capacitor breaking current	A	four hundred
ten	Rated no-load transformer breaking current	A	6000KVA transformer no-load current
eleven	1-minute power frequency withstand voltage (effective value) to ground, phase to phase, vacuum break/isolation break	KV	42/48
twelve	Full wave lightning impulse withstand voltage (peak) to ground, phase to phase, vacuum break/isolation break	KV	75/85
thirteen	Rated short-time withstand current (thermal stability)	KV/S	20/3
fourteen	Rated peak withstand current (dynamic stability)	KA	fifty
fifteen	Rated short-circuit closing current	KA	fifty
sixteen	Rated current breaking times	time	ten thousand
seventeen	mechanical life	time	ten thousand
eighteen	Allowable cumulative thickness of contact wear	mm	three
nineteen	Opening and closing operation torque (force)	Nm/(N)	175(350)

2. The technical parameters of the load switch fuse combination device are shown in the following table:

serial number	name	unit	parameter
one	rated voltage	KV	twelve
two	Maximum operating voltage	KV	twelve
three	rated frequency	Hz	fifty
four	Maximum rated current of fuse	A	one hundred and twenty-five	two hundred
five	Rated transfer current	A	two thousand	three thousand one hundred and fifty
six	The opening time of the fuse triggered switch	ms	35±5
seven	Rated short-circuit breaking current (expected effective value)	KA	thirty-one point five
eight	Rated short-circuit closing current (expected peak)	KA	eighty
nine	1-minute power frequency withstand voltage (effective value) to ground, phase to phase, vacuum break/isolation break	KV	42/48
ten	Full wave lightning impulse withstand voltage (peak) to ground, phase to phase, vacuum break/isolation break	KA	75/85
eleven	Fuse impactor output energy	J	2-5

3. Technical parameters of fuses for combination electrical appliances (see table below)

model	rated voltage	Fuse rated current	Rated breaking current	Rated current of melt
SDLAJ	twelve	forty	fifty	6.3,10,16,20,25,31.5,40
SFLAJ		one hundred		50,63,71,80,100
SKLAJ		one hundred and twenty-five		one hundred and twenty-five

4. Technical parameters for assembly and adjustment of vacuum arc extinguishing chamber (see table below)

serial number	project	unit	parameter
one	contact gap	mm	8+1
two	Contact profile	mm	3+1
three	Average closing speed	m/s	0.6±0.2
four	Average opening speed	m/s	1±0.2
five	Non synchronous opening and closing of three-phase contacts	ms	��2
six	Contact closing bounce time	ms	��2
seven	Distance between charged bodies and relative ground	mm	��125
eight	Main circuit resistance of upper and lower brackets	�̦�	��60

Outline drawing

1. Closing spring
2. Operating mechanism
3. Guiding sleeve
4. Adjust the screw sleeve
5. Opening buffer pad
6. Opening buffer spring
7. Bracket
9. Insulators
10 upper brackets
11. Vacuum arc extinguishing chamber
12. Insulation holder
13. Lower bracket
14 Insulated push-pull rod

1. Closing spring
2. Operating mechanism
3. Guiding sleeve
4. Adjust the bolt
5. Opening buffer pad
6. Opening spring
7. Bracket
8. Insulators
9. Isolation knife
10. Upper bracket
11. Vacuum arc extinguishing chamber
12. Insulation holder
13. Lower bracket
14. Insulated push-pull rod
15. Melting tube
16. Screw
17. Nut
18. Grounding knife

1. Combination appliance
2. �� 20 steel pipe (to be provided by the user)
3. Bend connection
4. Operating mechanism
5. Operating handle
6. Connect

[Indoor high-voltage load switch]ABB Type Load Switch (ABB Type Electric)

2026-6-19 19:32:12

FLN48-12 type load switch (ABB type electric) is suitable for three-phase AC 50Hz, rated voltage 12kV ring network power supply or double amplitude radiation power supply system. It is used to turn on and off load current and overload current, and can also be used to turn on and off no-load long lines, no-load transformers, and capacitor banks. The series combination of load switch and current limiting fuse can be used instead of circuit breaker, that is, the load switch is responsible for closing and breaking various load currents, while the current limiting fuse is responsible for breaking larger overload currents and short-circuit currents.

1. Features: Double break, three station, rotating moving contact.
2. Good insulation performance, the load switch is sealed with upper and lower shells cast with epoxy resin, and filled with 0.045mpa SF6 gas inside. The main circuit and grounding circuit system are all placed inside the shell.
3. Good safety performance. If an internal arc occurs and there is a weak structural point at the rear of the casing, it will be blown open. Subsequently, the arc relief valve on the cabinet will be opened and the overpressure airflow will be directed outside the cabinet.
4. Both manual and electric operation are available, with convenient and reliable operation.
Three phase overall installation, good periodicity, few components, easy adjustment and installation, simple and feasible. Maintenance free, long lifespan.

[Indoor high-voltage load switch]Indoor vacuum load switch - fuse

2026-6-19 19:32:03

ZFN21-12D/T630-20, ZFN21-12DR/T125-31.5 indoor vacuum load switch fuse combination device ZFN21-12D/T630-20, ZFN21-12DR/T125-31.5 high-voltage vacuum load switch and combination device are used in three-phase AC 10KV, 50Hz distribution systems. It has a compact structure, small size, light weight, long service life, and strong closing and breaking ability

The advantages of safety and reliability, when used in conjunction with fuses (referred to as combination appliances), can replace expensive circuit breakers, and its operation and maintenance are simple and convenient.

ZFN21-12D/T630-20, ZFN21-12DR/T125-31.5 indoor vacuum load switch fuse main technical parameters:

Appearance and installation dimensions

ZFN21-12D/T630-20, ZFN21-12DR/T125-31.5 indoor vacuum load switch fuse

[Indoor high-voltage load switch]FZN40 series vacuum load switch

2026-6-19 19:31:54

FZN40 series vacuum load switch

FZN40-12/T630 vacuum load switch
FZN40-12 (D)/T630 Vacuum Load Switch with Grounding Switch
FZRN40-12/T200 Vacuum Load Switch - Fuse Combination Electrical Appliance
FZRN40-12 (D)/T200 Vacuum Load Switch with Grounding Switch - Fuse Combination Apparatus

FZN40-12 is a vacuum load switch that applies the principle of vacuum arc extinguishing to achieve overload and short-circuit fault protection on 12kV lines. Due to the increasing environmental awareness of users around the world, products that cause pollution to the environment are gradually being phased out. FZN40-12 is a replacement product for the series of sulfur hexafluoride switches.
The FZN40-12 series vacuum switch is a frequently used switch equipment, and its mechanical and electrical lifespan can individually reach over 10000 cycles.
The FZN40-12 vacuum switch has a short-circuit breaking capacity of 31.5kA (or a transfer current of 3150kA when combined with a fuse) and equivalent protection function to a circuit breaker.
The FZRN40-12 fuse combination device integrates the intelligent control unit that can be equipped with a circuit breaker, the high breaking ability of its vacuum arc extinguishing chamber, and the advantage of the fuse in reverse time rapid breaking during high current short circuits. Therefore, it can independently break overload current multiple times like a circuit breaker, vacuum arc extinguishing chamber, and can also achieve a quick break fuse of less than 10ms. It has a long electrical life, can be equipped with a remote operation system, and is an intelligent switch with adjustable current characteristics.

·Model meaning
FZN40��12��/630��20
��
�� - Rated short-circuit breaking current (KA)
��-- Rated current (A)
��󧳴?-------- R is a base with a fuse, D is a base with a grounding knife
��©
��©------------------------------------------------------
��©--------------------------------------------------
��©---------------- Indoor
��©------------------ Vacuum
©--------------- Load switch

¡External dimensions

¡Installation size

[Indoor high-voltage load switch]FKN-12R series wall mounted load switch fuse combination electrical appliance

2026-6-19 19:31:45

The FKN-12R series wall mounted load switch fuse combination is suitable for controlling and protecting power equipment such as transformers, cables, overhead lines, etc. in three-phase distribution systems of 12kv and below; Especially suitable for terminal substations and box type substations in urban and rural power grids. And it is applicable to the control and protection of ring networks and dual radiation power supply units.
FKN-12R series wall mounted load switch - fuse combination electrical appliance

[Indoor high-voltage load switch]FKN-12 series wall mounted load switch

2026-6-19 19:31:35

FKN-12 wall mounted load switch is suitable for controlling and protecting power equipment such as transformers, cables, overhead lines, etc. in three-phase distribution systems of 12kv and below; Especially suitable for terminal substations and box type substations in urban and rural power grids. And it is applicable to the control and protection of ring networks and dual radiation power supply units. The fkn-12d series compressed air load switch can switch between load current and overload current. The fkn-12R series compressed air load switch fuse combination device can switch load current, overload current, and short-circuit current of the circuit.

The FKN-12 series wall mounted load switch has the characteristics of compact structure, reasonable design, reliable interlocking, and high insulation level. Its opening and closing adopt a vertical vertical and straight action mode; The spring energy storage operating mechanism ensures that the opening and closing speed is not affected by the operator's operating force; The arc is extinguished inside the bell shaped insulation cover, and the free gas during arc ignition will not cause a decrease in the insulation strength between phases or to ground. Install an organic transparent insulation cover between the bell shaped cover and the support (i.e. between the switch isolation fracture) to completely isolate the charged body. And the protection level of the anti net cabinet has been improved. Reliable mechanical interlocking is installed between the load switch and the grounding switch; At the same time, the switch panel is also equipped with mechanical interlocking with the cabinet. These interlocks are simple and effective, ensuring that there will be no misoperation or charging errors. This series of products adopts copper tungsten arc contacts and plum blossom shaped arc contacts, which make the switch conductive reliably and have a long electrical life. This series of products is easy to maintain, easy to operate, reliable in operation, and highly praised by a large number of users.

2�� Meaning of FKN12A-12 model
F K N - 12
��
��
��----------- Rated voltage
��---------------- Indoor
��------------------- Air type
��--------------- Load switch

2�� Environmental conditions:
a) The ambient air temperature shall not exceed 40 ��, and the daily average temperature shall not exceed 35 ��; The minimum ambient air temperature is -15 ��.
b) The average daily relative humidity does not exceed 95%; The average daily water vapor pressure shall not exceed 2.2kPa; The average monthly relative humidity does not exceed 90%; The average monthly water vapor pressure shall not exceed 1.8kPa.
c) The altitude shall not exceed 1000m.
d) The surrounding air is not significantly polluted by dust, smoke, corrosive and/or flammable gases, vapors, or salt spray.
e) Vibration or ground motion from outside the switchgear and control equipment can be ignored.
f) The level amplitude of electromagnetic interference induced in the secondary system shall not exceed 1.6V.

FKN-12 series wall mounted load switch

[Indoor high-voltage load switch]FZRN21-12D/T125-31.5 AC high-voltage vacuum load switch fuse combination

2026-6-19 19:31:27

1�� Scope of application
The FZRN21-12D/T125-31.5 type wide J internal AC high-voltage true narrow load switch fuse combination is suitable for use in power supply of two or three phase AC 50HZ, rated voltage 12KV. It is used for breaking load current, overload current and short-circuit current, and is particularly suitable for places without oiling, maintenance and frequent operation requirements. The load switch and combination device have obvious isolation faults, can be equipped with grounding knives and motor spring mechanisms with closing capabilities, and can achieve remote control.

2�� FZRN21-12D/T125-31.5 AC High Voltage Vacuum Load Switch Fuse Combination Model and Its Meaning

3�� Structural characteristics
3.1 Basic Structure
This combination electrical appliance is a three-phase linkage structure. (See Figure 1) It mainly consists of a frame (1), a vacuum arc extinguishing chamber (6), a fuse (3) acting as an isolation knife, a grounding knife (9), a trip rotating device (14), and a spring operating mechanism (17). The isolation knife, vacuum arc extinguishing chamber, and grounding knife are fixed to the frame through insulators. The spring operating mechanism is installed on the side panel of the frame.
3.2 Working principle
3.2.1 Operation of vacuum arc extinguishing chamber
The operation mode of the vacuum arc extinguishing chamber that constitutes the electrical appliance adopts an electric spring operating mechanism. You can also manually close the switch by turning the joystick clockwise, and open it manually or electrically.
3.2.2 Operation of opening and closing of isolation knife and grounding knife
There should be reliable interlocking between the vacuum arc chamber, isolation knife, and grounding knife of the composite electrical appliance. The isolation knife is linked with the grounding knife. When the isolation knife is opened to the isolation distance, the grounding knife starts to store energy and close or open. The grounding knife opens first, and the isolation knife closes later. Only when the vacuum arc extinguishing chamber is in the open state, can the isolation knife and grounding knife be operated; When the grounding switch is closed, the vacuum arc extinguishing chamber cannot be operated.
3.2.3 Fuse impact tripping and opening
When the short-circuit current or overload current flows through the main circuit of the composite electrical device in the closed position, at least one of the phase fuses of the fuse will melt, and the impactor will act, hitting the mechanical locking device of the composite electrical device, so that the vacuum arc extinguishing chamber can achieve reliable and fast opening under the action of the opening spring.
The structure and principle of the load switch are the same as the basic machine of the composite electrical device, and there is no fuse item (3) and trip mechanism item (14) in the instrument.

4�� FZRN21-12D/T125-31.5 AC High Voltage Vacuum Load Switch Fuse Combination Unit Appearance and Installation Dimensions

5�� Main technical parameters
1. Technical parameters of composite electrical appliances

serial number	Name	unit	parameter
one	rated voltage	KV	twelve
two	rated frequency	Hz	fifty
three	Maximum rated current of fuse	A	one hundred and twenty-five
four	Rated breaking and handover current	A	three thousand one hundred and fifty
five	The opening time of the switch triggered by the fuse	ms	40±5
six	Rated short-circuit breaking current (expected effective value)	KA	thirty-one point five
seven	Rated short-circuit ignition current (expected peak)	KA	fifty
eight	1-minute power frequency withstand voltage; Vacuum fracture phase, relative ground/isolated fracture	KA	42/48
nine	Lightning impulse withstand voltage: vacuum fracture Same, relative/isolated fracture surface	KV	75/85
ten	Rated short-circuit closing current (expected peak)	K	2~5

2. Main technical parameters of load switch

serial number	Name	unit	parameter
one	rated voltage	KV	twelve
two	rated frequency	Hz	fifty
three	rated current	A	six hundred and thirty
four	Rated Active load breaking current	A	six hundred and thirty
five	Rated closed-loop breaking current	A	six hundred and thirty
six	50% rated active load breaking current	A	thirty-one point five
seven	Rated cable charging breaking current	A	ten
eight	The breaking capacity of the rated no-load transformer	KVA	one thousand two hundred and fifty
nine	1-minute power frequency withstand voltage; Narrowly spaced fracture surfaces, relatively isolated fracture surfaces	KV	42/48
ten	Lightning impulse withstand voltage; Vacuum fracture Phase to phase, relative to ground/isolated fracture	KV	75/85
eleven	Rated short-time withstand current (thermal stability)	KNS	20/4
twelve	Rated peak withstand current (dynamic stability)	KA	fifty
thirteen	Rated short-circuit closing current	KA	fifty
fourteen	Rated current breaking times	time	ten thousand
fifteen	Mechanical lifespan (vacuum arc extinguishing chamber, isolation)	time	1 0000/20000
sixteen	Allowable wear thickness of vacuum arc extinguishing chamber contacts	mm	two
seventeen	Manual operating torque	N��m	four thousand and two hundred

3. Technical parameters for assembly and adjustment of vacuum arc extinguishing chamber

serial number	name	unit	unit
one	contact gap	mm	10±1
two	overrun	mm	4±0.5
three	Average closing speed	m/s	0.6±0.2
four	Average opening speed (before opening distance reaches 6mm)	m/s	1.1±O.2
five	The opening and closing phases of the two and three phase contacts are different	ms	��2
six	Contact closing bounce time	ms	��2
seven	Distance between charged bodies and relative ground	mm	��125
eight	E�� Main circuit resistance between lower brackets	UQ	��70

4. Technical parameters of fuses for combination electrical appliances

model	Rated voltage KV	Rated current of fuse A	Rated power on/off A	Rated current of melt A
SDLAJ	twelve	forty	thirty-one point five	6.3, 10, 16, 20, 25, 31.5, 40
SFLAJ		one hundred	forty	50, 63, 71, 80, 100
SKLAJ		one hundred and twenty-five	fifty	one hundred and twenty-five

6�� Ordering Notice
Users should indicate when placing an order:
a. Model, name, specification, quantity;
b. The name, specifications, and quantity of spare parts.
c. Operating mechanism model, operating voltage type and rated value.

[Indoor high-voltage load switch]FN Port - 40.5 Series Load Switch FN��-40.5/630 FN��-40.5DRL/630

2026-6-19 19:31:18

FN port -40.5/630, FN port -40.5DRL/630 load switch

[Indoor high-voltage load switch]FN - 24 series indoor load switch and fuse set combination electrical appliance

2026-6-19 19:31:09

The FN Kou-24 series indoor load switch and fuse set combination electrical device is mainly used for load control and short-circuit protection in urban distribution stations and industrial electrical equipment with 24KV three-phase AC 50Hz ring network or terminal power supply. Due to the more reliable protection of transformers and other electrical equipment by composite appliances compared to circuit breakers, they are particularly suitable for ring networks, radiation power supply units, and box type substations.

[Indoor high-voltage load switch]FN2-10 series load switch

2026-6-19 19:31:00

FN2-10 (R) type indoor AC high-voltage load switchgear with three-phase AC 50Hz switching relationship, used for power with a rated voltage of 10KV
In the system, it is used for opening and closing circuits under normal circumstances The load switch is equipped with RN type high-voltage fuse, which can break short-circuit current and is used for overload and short-circuit purposes Equipped with CS4 type manual mechanism for operation

[Indoor high-voltage load switch]FKN12-12 series indoor high-voltage load switch

2026-6-19 19:30:52

Overview

FN12-12D/630-20 indoor AC high voltage load switch (hereinafter referred to as FN12-12D load switch) is a three-phase high voltage switchgear with a rated voltage of 12KV and a rated frequency of 50Hz. It is used for switching load current, closed-loop current, no-load transformer and cable charging current, and short-circuit current. Load switches equipped with grounding switches can withstand short-circuit currents.

The FN12-12D. R/100-31.5 indoor AC high voltage load switch fuse combination (hereinafter referred to as FN12-12D. R combination) is an indoor high voltage switchgear that combines the FN12-12D load switch with the S �� LAJ-12 (XRNT �� -12) high voltage current limiting fuse. It can reliably disconnect any current up to the short-circuit current: load switch disconnects the working current, fuse disconnects the short-circuit current, and jointly disconnects any overcurrent between the working current and the full short-circuit current, while the fuse opens the load switch through its impactor.

Normal working environment
1. Surrounding air temperature: upper limit+40 ��, lower limit -25 ��.
2. The altitude is 1000m and below.
3. Relative humidity: Monthly average not exceeding 90%, daily average not exceeding 95%.
4. The surrounding air should not be significantly polluted by corrosive or flammable gases, as well as steam gases.
5. No frequent vigorous exercise.
6. Pollution resistance level: Level II.
If the usage conditions exceed the above regulations, they shall be determined through consultation between the user and the manufacturer.

Technical parameters and performance of FKN12-12 series indoor high-voltage load switch

serial number	project	unit	FN12-12D/630-20	FN12-12D.R/100-31.5
one	rated voltage	kV	twelve
two	rated frequency	Hz	fifty
three	rated current	A	six hundred and thirty	one hundred
four	Lightning impulse withstand voltage	kV	Ground and phase to phase 75, isolated and disconnected 85
five	1-minute power frequency withstand voltage	kV	To ground and phase 42, isolate and disconnect 48
six	Rated thermal stability current	kA	20��4S��
seven	Rated dynamic stable current	kA	fifty
eight	Rated closing current (peak value)	kA	fifty
nine	Rated short-circuit breaking current	kA		thirty-one point five
ten	Rated transfer current	kA		one point five
eleven	Maximum breaking current (reference value)	kA	one point eight
twelve	Disconnect the capacity of the no-load transformer	Kva	one thousand two hundred and fifty
thirteen	Rated cable charging current	A	ten
fourteen	Rated active load current breaking times	time	>100
fifteen	The time when the impactor triggers the load switch to open	S		>0.06
sixteen	Grounding switch thermal stability current	kA	20��2S��	20��2S��
seventeen	Grounding switch thermal stability current (peak)	kA	fifty	fifty
eighteen	Electric motor operating power supply voltage	V	AC220��DC48

·Mechanical characteristic parameters

serial number	project	unit	FN12-12D/630-20	FN12-12D.R/100-31.5
one	Auxiliary contact opening distance	mm	>155
two	Synchronization of three-phase opening and closing	ms	<3
three	Just divided speed	m/s	>2.8	2.80+0.4
four	Just closed speed	m/s	>3.8
five	Grounding switch fracture distance	mm	145 ± 5
six	main circuit resistance	�̦�	<120	<300
seven	Maximum operating force distance	N.m	<160	<180

·Main technical parameters of FKN12-12 series indoor high-voltage load switch

serial number	Model number		Rated current for melting (A)	Capacity of transformer (kVA)
serial number	UK model	National standard model	Rated current for melting (A)	Capacity of transformer (kVA)
one	SDLAJ-12	XPNT��-12	sixteen	100��125��160
two			twenty	two hundred
three			twenty-five	two hundred and fifty
four			thirty-one point five	three hundred and fifteen
five			forty	four hundred
six	SFLAJ-12		fifty	five hundred
seven			sixty-three	630��800
eight			eighty	one thousand
nine	SSLAJ-12		one hundred	one thousand two hundred and fifty
ten	SKLAJ-12		one hundred and twenty-five	one thousand and six hundred

·FKN12-12 series indoor high-voltage load switch appearance and installation dimension diagram

[Indoor high-voltage load switch]FKRA12A-12D Load switch and fuse combination device

2026-6-19 19:30:43

FKRA12A-12D load switch and fuse combination device

[Indoor high-voltage load switch]FN7 series high-voltage load switch

2026-6-19 19:30:34

The FN7 indoor AC high-voltage load switch is suitable for electrical networks operating at 50Hz and 12KV, and is used for breaking load currents and closing short-circuit currents. Load switches with fuses can cut off short-circuit currents and serve as protective switches.

[Indoor high-voltage load switch]FZN23-12 High voltage vacuum load switch

2026-6-19 19:30:26

FZN23-12 (D)/630 indoor vacuum load switch and FZRN23-12 (D)/125 vacuum load switch fuse combination are suitable for high-voltage switchgear with three-phase AC 50Hz and 12kV. They are used for breaking load current and closing short-circuit protection. The combination can also break short-circuit current for short-circuit protection. They are the main components for controlling and protecting power equipment such as transformers, cables, and overhead lines.

2�� FZN23-12 High Voltage Vacuum Load Switch Main Types
FZN23��12/630
Vacuum load switch
FZN23��12D/630
Vacuum load switch with grounding switch
FZRN23��12/125
Vacuum load switch fuse combination device
FZRN23-12D/125
Vacuum load switch fuse combination with grounding switch

3�� Technical parameters

name	unit	load switch	combined electrical apparatus
rated voltage	kV	twelve	twelve
rated current	A	six hundred and thirty	one hundred and twenty-five
Rated active load breaking current, rated closed-loop breaking current	A	six hundred and thirty
Rated short-time withstand current (2S)	kA	twenty
Rated short-circuit closing current	kA	fifty
Rated peak withstand current	kA	fifty
Rated cable charging breaking current	A	ten
Rated open circuit no-load transformer	kVA	one thousand and six hundred	one thousand and six hundred
Rated breaking and handover current	A		two thousand
Rated short-circuit breaking current of fuse	kA		31.5 (expected value)
1-minute power frequency withstand voltage (phase to phase, ground/isolation fracture)	kV	42/48	42/48
Lightning impulse withstand voltage (phase to phase, ground/isolated fracture)	kV	75/85	75/85
mechanical life	time	five thousand	five thousand
Electric operating voltage	V	AC/DC 220V
Rated voltage of shunt release	V	AC/DC 220V

4�� Outline drawing of switch and cabinet door opening diagram

5�� Ordering Notice
Product model/quantity:
Installation method: (formal, side mounted, inverted)
Operation panel position: (right, left, L size)
Operation mode: (manual, electric)
Special requirements: (shunt release, auxiliary switch)
Other requirements: (mode of transportation, delivery time)

[Indoor high-voltage load switch]FN11 series indoor high-pressure compressed air load switch

2026-6-19 19:30:16

The FN11 series indoor high-pressure compressed air load switch is a latest improved compressed air load switch. All conductors are fixed in an insulation frame, and the insulation is made of high-strength, non combustible unsaturated polyester SMC material, which has the characteristics of long electrical life, high transfer current, reliable stability, easy operation, high insulation level, and strong serialization. In the case where the main structure is completely identical, it can be divided into:
1. Load switch
2. Load switch fuse combination device
3. The three position isolation switch, among which the load switch can be divided into two types: grounded and ungrounded switches. The operating mechanism includes manual and electric mechanisms.
The FN11-12 series household high-voltage compressed air load switch is assembled in the HXGN-12 metal enclosed ring main switch cabinet and box type substation, which can form numerous wiring schemes to meet various requirements of users for control, protection, metering, etc. Ring network power supply enables users within the ring network system to enjoy two or more loop power supplies, with one as the main power supply loop and the other as the backup power supply loop, providing comprehensive services.
HXGN-12 metal enclosed box type load switchgear is an indoor complete distribution device with a rated voltage of 3-12Kv and a rated frequency of 50Hz for three-phase AC. Suitable for power distribution systems in factories, enterprises, residential areas, residential communities, high-rise buildings, and mining ports. The ring main unit plays a role in receiving, distributing, and controlling electrical energy, as well as protecting the safe operation of electrical equipment.

Main technical parameters of FN11 series indoor high-pressure compressed air load switch:

serial number	name	unit	FN11-12 FN11-12R(T)
one	rated voltage	kV	twelve
two	rated frequency	Hz	fifty
three	rated current	A	The maximum rated current of the fuse equipped with 400 is 100A and 125A
four	Rated Active load breaking current	A	400/630
five	Rated closed-loop breaking current	A	400/630
six	5% rated active load breaking current	A	20/31.5
seven	Rated cable charging current	A	ten
eight	Rated short-time withstand current (thermal stability current)/duration	kA/s	20/2
nine	Rated short-time withstand current (thermal stability current)/duration of grounding switch	kA/s	16/2
ten	Rated peak withstand current (dynamic stability current)	kA	fifty
eleven	Rated breaking transfer current	A	------- 1000
twelve	Rated short-circuit breaking current (current limiting fuse)	kA	------- 31.5
thirteen	Lim power frequency withstand voltage (effective value) to ground, phase/isolation fracture	kV/kV	42/48
fourteen	Full wave lightning impulse withstand voltage (peak) to ground, phase/isolation fracture	kV/kV	75/85
fifteen	The time for triggering the switch when the fuse is blown	ms	------- 35+five
sixteen	When the fuse is blown, it impacts the output energy	J (joules)	------- 1
seventeen	mechanical life	time	two thousand
eighteen	Load switch opening and closing operating torque	N.m	ninety
nineteen	Grounding knife opening and closing operation torque	N.m	twenty
twenty	Rated opening operation voltage	V	~220/~110

Selection of High Voltage Current Limiting Fuses

Transformer capacity (kva)

one hundred

one hundred and twenty-five

one hundred and sixty

two hundred

two hundred and fifty

300/315

four hundred

five hundred

six hundred and thirty

750/850

one thousand

one thousand two hundred and fifty

one thousand and six hundred

Rated current of fuse (a)

sixteen

twenty

twenty-five

thirty-one point five

forty

fifty

sixty-three

eighty

one hundred

one hundred and twenty-five

The recommended model for using fuses is XRNT-12 high-voltage current limiting fuse
The impact output energy of the fuse is 1J (joules) medium

[Indoor high-voltage load switch]FLRN48 Indoor AC High Voltage Load Switch Fuse Combination Electrical Appliance

2026-6-19 19:30:07

FLRN48 indoor AC high-voltage load switch fuse combination device (referred to as combination device) is a new type of load switch fuse combination device designed and manufactured based on the mature experience of existing combination device production in China and advanced technology from abroad. It is a supporting equipment for HXGN �� -12 AC metal enclosed ring network switchgear, which can meet the needs of power system users in various regions. It has the advantages of simple structure, low maintenance, strong arc extinguishing ability, high insulation level of the fracture surface, and high reliability.

[Indoor high-voltage load switch]FN16A-12 series indoor AC high-voltage vacuum load switch

2026-6-19 19:29:59

The performance of FN16A-12/630 indoor AC high-voltage load switch and FN16A-12RD/200-31.5 load switch fuse combination device meets the requirements of GB3804-90 "3-63KV AC high-voltage load switch" and IEC420 "AC high-voltage load switch fuse combination device" (1990 edition) international standards and national standards (draft for approval). It has the characteristics of small size, beautiful appearance, flexible installation, low operating force, safe and reliable disconnection, long electrical life, frequent operation, large current transfer during disconnection, basically no maintenance required, obvious isolation fracture, manual and electric functions, and can achieve remote control. The load switch fuse combination device also has the function of protecting transformers from overload and preventing equipment from running in phase loss.

Working conditions of FN16A-12 series indoor AC high-voltage vacuum load switch

1. Altitude not exceeding 1000 meters;
2. Surrounding air temperature: not higher than+40 �� and not lower than -25 ��;
3. Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%;
4. The surrounding air should not be significantly polluted by corrosive or flammable gases;
5. No frequent vigorous exercise.

FN16A-12 series indoor AC high-voltage vacuum load switch model meaning

Structure Diagram

[Indoor high-voltage load switch]FN18-12 series indoor high-voltage load switch

2026-6-19 19:29:50

The FN18-12 indoor high-voltage load switch has the advantages of advanced design, easy operation, small size, comprehensive functions, light weight, fast switching speed, and high reliability. Suitable for AC 50Hz, rated voltage 12KV, rated current 630A, and three-phase distribution systems, especially suitable for urban network renovation projects, high-rise buildings, and public facilities' ring network power supply. It is an ideal product for box type substations and transformer protection.

Main technical parameters of FN18-12 series indoor high-voltage load switch

Serial number	Component Name	Unit	FN18-12D/630	FN18-12DR/100-31.5
one	rated voltage	KV	twelve
two	highest frequency	Hz	fifty
three	rated current	A	six hundred and thirty	one hundred
four	1-minute power frequency withstand current	KV	Ground and phase 42, isolation and disconnection 48
four	Lightning impulse withstand voltage	KV	Ground and phase to phase 75, isolation and disconnection 85
five	spacing	mm	one hundred and seventy
six	Rated dynamic stable current	KA	fifty
seven	Rated thermal stability current	KA/S	20/2
eight	Rated cable charging current	A	ten
nine	Rated transfer current	A		one thousand and six hundred
ten	Disconnect the capacity of the no-load transformer	KVA	one thousand two hundred and fifty
eleven	Rated short-circuit breaking current (melting value)	KA		31.5��50
twelve	Rated short-circuit closing current (peak)		fifty
thirteen	Rated active load current breaking times		six hundred and thirty
fourteen	Rated thermal stability current of grounding switch	KA/S	16/2
fifteen	Rated active load current breaking times	time	one hundred
sixteen	mechanical life	time	two thousand

FN18-12 series indoor high-voltage load switch

[Indoor high-voltage load switch]FZN22-12 series indoor AC high-voltage vacuum load switch

2026-6-19 19:29:42

FZN22-12 series indoor AC high-voltage vacuum load switch

[Indoor high-voltage load switch]SFG12-12D/T630-25 Three position sulfur hexafluoride load switch

2026-6-19 19:29:33

SFG12-12D/T630-25 three station sulfur hexafluoride load switch

[Indoor high-voltage load switch]HFL36-12/630-20II Type SF6 Load Switch

2026-6-19 19:29:24

The HFL36-12D SF6 load switch is a medium voltage switchgear developed independently according to the relevant standards of China's power system. Its various performance indicators fully comply with IEC420694129 and the national standard GB3804-901985-8911022-89, and it is the main switching component of the ring cabinet.
The HFL36-12D SF6 three position load switch is a multifunctional medium voltage switchgear that integrates switching, opening, and grounding. It is filled with 0.05MPa SF6 gas in a fully sealed, reinforced epoxy resin shell, and achieves the above three functions with minimal components, thus ensuring product quality and improving reliability. The equipment is maintenance free and can operate safely for more than 20 years under normal conditions.

The HFL36-12/630-20II SF6 load switch is operated by a manual or electric operating mechanism independent of the switch to close and open the main circuit. The opening and closing speed of the switch is determined by the spring and is independent of the manual speed. After installing electric mechanisms and microcomputer measurement and control devices, remote sensing, remote signaling, and remote control can be achieved, providing necessary conditions for power grid automation.

characteristic
I have over five years of experience in safe operation in China.
Excellent technical performance, long electrical lifespan, and maintenance free.
Small size, light weight, easy maintenance, convenient and safe operation.
The collection switch, disconnection switch, and grounding switch are integrated and packaged in an epoxy resin shell filled with SF6 gas. The three positions are interlocked, with a compact structure and high safety and reliability.

Arc extinguishing principle of load switch
SF6 gas has excellent arc extinguishing performance. In order to quickly extinguish the arc, the switch generates an arc as soon as the moving and stationary contacts separate during the current interruption process. At this time, due to the magnetic field of the permanent magnet, the arc is driven to move rapidly, causing it to elongate and continuously combine with SF6 gas, which is quickly released and cooled. It is extinguished at zero current crossing, and the double break distance has insulation level that isolates the break. The permanent magnet rotary arc principle has low operating power, strong arc extinguishing ability, light contact burns, and extends electrical life.

meet the standard
The switch device meets the following standards:
1 IEC420694129
2 GB3804-901985-8911022-89

[Indoor high-voltage load switch]FZN16A-12 series vacuum load switch 630A

2026-6-19 19:29:15

The FZN16A-12 series indoor AC high-voltage load switch fuse combination device meets the international and national standards of GB3804-90 "3-63kV AC voltage load switch" and IEC420 "AC high-voltage load switch fuse combination device" in terms of performance.

The FZN16A-12 series indoor high-voltage vacuum load switch is suitable for use in 6-10kV three-phase AC 50Hz power grids as a means of breaking load currents and closing short-circuit currents; Especially suitable for places that require oil-free, non maintenance, and frequent operation.

This product has an independent isolation fracture surface; The manual operation force is small, and it can be equipped with two types of vacuum arc extinguishing chambers: ceramic tube or glass tube. It is an ideal product for oil-free high-voltage switches and equipment upgrades.

Technical parameters of FZN16A-12 series vacuum load switch load switch:

serial number	Name	Unit	Parameters
one	rated voltage	kV	twelve
two	rated current	A	six hundred and thirty
three	Rated Active load breaking current	A	six hundred and thirty
four	Rated closed-loop breaking current	A	six hundred and thirty
five	5% rated active load breaking current	A	thirty-one point five
six	Rated cable charging breaking current	A	ten
seven	Breaking current of rated no-load transformer	A	1250KVA transformer air cut current
eight	1-minute power frequency withstand voltage (effective value) To the ground, alternating	kV	42/48
nine	Full wave lightning impulse withstand voltage (peak value) To the ground, alternating	kV	75/85
ten	Rated peak withstand current	kA	fifty
eleven	Rated short-time withstand current	kA/S	20/3
twelve	Rated short-circuit closing current	kA	fifty
thirteen	Rated current breaking times	time	ten thousand
fourteen	mechanical life	time	ten thousand
fifteen	Allowable cumulative thickness of contact wear	mm	three
sixteen	Interphase center distance	mm	two hundred and ten
seventeen	Manual operation for distance	N.M	��100
eighteen	Dimensions: Width X Height X Depth	mm	700×800×300

Technical parameters for assembly and adjustment of vacuum arc extinguishing chamber of FZN16A-12 series vacuum load switch:

serial number	Name	Unit	Parameters
one	contact gap	mm	8+1
two	Contact itinerary	mm	3+1
three	Average closing speed	m/s	0.6±0.2
four	Average opening speed	m/s	1±0.2
five	Non synchronous opening and closing of three-phase contacts	ms	��2
six	Contact closing bounce time	ms	��2
seven	Distance between charged bodies and relative ground	mm	��125
eight	Main circuit resistance between upper and lower brackets	��	��60

[Indoor high-voltage load switch]FZN25-12 series vacuum load switch

2026-6-19 19:29:07

FN25 and FZRN25 vacuum load switches and combination devices are suitable for use in three-phase AC 50Hz ring networks or terminal power supply and industrial electrical equipment for load control and short-circuit protection. The load switch is used to open and close loads, closed-loop currents, no-load transformers, and cable currents. Combination appliances can disconnect any current up to the rated short current. Adopting direct action isolation fracture and vacuum arc chamber linkage. It has manual and electric functions.
The unique transmission structure design of FZN25 and FZRN25 allows the arc extinguishing chamber to only withstand high voltage at the moment of closing and opening, resulting in small size and low price.
FZN25 and FZRN25 can achieve one-time operation of isolating the fracture surface and extinguishing chamber fracture surface.
FZN25 and FZRN25 have grounding valves that are interlocked with the grounding switch between the static contact and the moving conductor, ensuring safety and facilitating maintenance.

Three main technical parameters:

serial number	project		unit	parameter
				FZN25-12D/T630-20	FZTN25-12D/T25-31.5
one			KV	twelve
two			Hz	fifty
three			A	six hundred and thirty	one hundred and twenty-five
four	Rated insulation level	1-minute power frequency withstand voltage	KV	Arc extinguishing chamber fracture 30: to ground, phase to phase 42; Isolation fracture 48
		Lightning impulse withstand voltage	KV	Ground to ground, alternating 75; Isolation fracture 85
five	Rated dynamic stability current (peak value)		KA	fifty	--
six	4S thermal stability current		KA	twenty	--
seven	Rated Active load breaking current		A	six hundred and thirty	--
eight	Rated closed-loop breaking current		A	six hundred and thirty	--
nine	Rated cable charging arbitrary current		A	ten	--
ten	Disconnect the capacity of the no-load transformer		KV/A	one thousand two hundred and fifty	--
eleven	Rated short-circuit switch breaking current		KA	--	thirty-one point five
twelve	Rated transfer current, rated handover current		A	--	two thousand
thirteen	Fuse model			--	SDLAJ-12 SFLAJ-12
fourteen	Impactor output energy		J	--	2-5 (moderate)
fifteen	Rated short-circuit closing current		KA	fifty
sixteen	Rated dynamic stability current of grounding switch		KA	fifty
seventeen	Grounding switch 2S thermal stability current		KA	twenty
eighteen	Rated voltage of auxiliary circuit		V	��220�� one hundred and ten
nineteen	mechanical life		time	ten thousand

[Indoor high-voltage load switch]FLRN36-12D/125-50 Indoor AC High Voltage Load Switch Fuse Combination Electrical Appliance

2026-6-19 19:28:58

FLRN36-1D/125-50 indoor AC high voltage load switch fuse combination device (referred to as combination device) is a new type of load switch fuse combination device designed and manufactured based on the mature experience of existing combination device production in China and advanced foreign technology. It is a supporting equipment for HXGN-12 AC metal enclosed ring network switchgear, which can meet the needs of power system users in various regions. It has the advantages of simple structure, low maintenance, strong arc extinguishing ability, high insulation level of the fracture surface, and high reliability. The product meets the requirements of standards such as GB16926 and GB/T11022.

FLRN36-1D/125-50 Indoor AC High Voltage Load Switch Fuse Combination Electrical Outline and Installation Drawing:

Three main technical parameters:

serial number	name			unit	load switch	combined electrical apparatus
one	rated voltage			KV	twelve	twelve
two	rated current			A	six hundred and thirty	one hundred and twenty-five
three	rated frequency			Hz	fifty	fifty
four	Rated short-circuit closing current (peak)			KA	fifty	/
five	Rated short-time withstand current				twenty	/
six	Rated peak withstand current				fifty	/
seven	Rated short-circuit duration			S	four	/
eight	Rated Active load breaking current			A	six hundred and thirty	/
nine	Rated closed-loop breaking current			A	six hundred and thirty	/
ten	Rated cable charging current				ten	/
eleven	5% rated active load breaking current				thirty-one point five	/
twelve	Rated short-circuit breaking current			KA	/	fifty
thirteen	Rated transfer current			A	/	one thousand five hundred and fifty
fourteen	Rated insulation level	1-minute power frequency withstand voltage	Pole to pole, pole to ground	KV	forty-two	forty-two
		1-minute power frequency withstand voltage	isolation gap		forty-nine	forty-nine
		Lightning impulse withstand voltage	Pole to pole, pole to ground		seventy-five	seventy-five
		Lightning impulse withstand voltage	isolation gap		eighty-five	eighty-five
fifteen	Each pole circuit resistance			�̦�	�� 70 (excluding fuse resistance)
sixteen	Mechanical lifespan of load switch			time	two thousand	two thousand
seventeen	Rated short-time withstand current of grounding switch			KA	twenty	twenty
eighteen	Rated peak withstand current of grounding switch			KA	fifty	fifty
nineteen	Rated short-circuit duration of grounding switch			S	four	four
twenty	Rated short-circuit closing current of grounding switch			KA	fifty	fifty
twenty-one	Mechanical lifespan of grounding switch			time	two thousand	two thousand

FLRN36-1D/125-50 Indoor AC High Voltage Load Switch Fuse Combination Electrical Appliance

[Indoor high-voltage load switch]NAL-12/12R type load switch

2026-6-19 19:28:49

NAL-12 load switch and NAL-12R load switch fuse combination electrical appliances can be equipped with grounding switches. Technical parameter table:

serial number	Name			unit	NAL��12D	NAL��12DR
one	rated voltage			kV	twelve	twelve
two	rated frequency			Hz	fifty	fifty
three	rated current			A	630��1250��	one hundred
four	rated	1-minute power frequency withstand voltage	To the ground, alternating with each other	kV	forty-two	forty-two
	Insulation level	1-minute power frequency withstand voltage	isolation gap		forty-eight	forty-eight
		Lightning impulse withstand voltage (peak value)	To the ground, alternating with each other		seventy-five	seventy-five
		Lightning impulse withstand voltage (peak value)	isolation gap		eighty-five	eighty-five
five	Rated short-circuit withstand current (Dynamic Stable Current)		load switch	kV	fifty
five			grounding switch	kV	sixteen
six	Rated short-circuit duration (Thermal stability time)		load switch	S	two
six	Rated short-circuit duration (Thermal stability time)		grounding switch	S	two
seven	Rated short-circuit closing current (peak)			kV	fifty
eight			Active load breaking current	A	six hundred and thirty
			Closed loop breaking current		six hundred and thirty
	Rated breaking current		5% active load breaking current		thirty-one point five
			Cable charging current		ten
			Disconnect the capacity of the no-load transformer	kVA	one thousand two hundred and fifty
nine	Rated short-circuit breaking current (current limiting fuse)			kV		thirty-one point five
ten	Rated transfer current			A		one thousand and six hundred
eleven	mechanical life			time	two thousand	two thousand

Structural Characteristics Table

serial number	Name	unit	Parameters
one	Fracture distance	mm	��212
two	Interphase center distance	mm	one hundred and seventy
three	Just open and close speed	m/s	��5
four	Positive pressure of the spring between the main contact blade and the contact	N	230±23
five	Closing operation torque	N.M	80-100
six	Three phase closing at different stages	mm	��3
seven	Three phase disconnection at different stages	mm	��3
eight	The inherent opening time of the separation release device	ms	40~65
nine	main circuit resistance	�̦�	��100

The rated current of the limiting fuse of the NAL-12DR load switch fuse combination is selected according to the transformer capacity, and the parameters are shown in the following table:

Transformer capacity (KVA)

one hundred

one hundred and twenty-five

one hundred and sixty

two hundred

two hundred and fifty

300/

thirty-one point five

four hundred

five hundred

six hundred and thirty

750/

eight hundred

one thousand

one thousand two hundred and fifty

Rated current of fuse (A)

sixteen

twenty

twenty-five

thirty-one point five

forty

fifty

sixty-three

eighty

one hundred

one hundred and twenty-five

NAL12 series technical assembly drawing

NAL12-6K170R

NAL12-6K170RE

NALF12-6A170R

NALF12-6A170RE

[Indoor high-voltage load switch]FZRN25-12D Indoor High Voltage Vacuum Load Switch

2026-6-19 19:28:41

FZN25-12D/T630-20 indoor AC high-voltage vacuum load switch and FZRN25-12D/T100-31.5 indoor AC high-voltage vacuum load switch fuse combination are control and protection devices for three-phase AC 50Hz, 12kV distribution systems. The products are oil-free, non-toxic, and have no fire or explosion hazards, and are widely used in industrial and mining enterprises, urban building distribution stations, and other places. The latter has a more reliable protective effect on electrical equipment such as transformers than circuit breakers, and is particularly suitable for ring networks, dual radiation power supply units, and box type substations FZN25-12D/T630-20 indoor AC high-voltage vacuum load switch (hereinafter referred to as load switch) is an indoor device with three-phase AC 50Hz and rated voltage of 12kV, suitable for industrial and mining enterprises
In places such as substations and substations, as protection and control for electrical facilities, it is used for dividing and combining load currents, closed-loop currents, no-load transformers, and cable charging currents. It is a grounding switch with the ability to close short-circuit currents. Its operating mechanism can be manual and electric, making it easy to achieve the three remote control requirements of the power system.

FZRN25-12D/T100-31.5 indoor AC high-voltage vacuum load switch fuse combination (hereinafter referred to as the combination) is an indoor device with three-phase AC 50Hz and rated voltage of 12kV, suitable for load control and short-circuit protection in industrial and mining enterprise distribution stations and substations. It also has a grounding switch with the ability to close short-circuit currents. Its operating mechanism can be manual and electric, making it easy to achieve the three remote control requirements of the power system.

The load switch complies with GB3804 standard, and the combination electrical appliance complies with GB16926 standard.

[Indoor high-voltage load switch]FZN12-10D/630 Indoor vacuum load switch

2026-6-19 19:28:32

FZN12-10D/630-50 indoor AC high voltage load switch (hereinafter referred to as FN12-10D load switch) is a three-phase high voltage switchgear with a rated voltage of 10KV and a rated frequency of 50Hz. It is used for switching load current, closed-loop current, no-load transformer and cable charging current, and short-circuit current. Load switches equipped with grounding switches can withstand short-circuit currents.

FZN12-10 (R) D/100-31.5 AC high voltage load switch fuse combination (referred to as FN12-10 (R) D combination) is an indoor high voltage switchgear that combines FN12-10D load switch with S �� LAJ-12 (XRNT �� -10) high voltage current limiting fuse. It can reliably disconnect any current up to the short-circuit current; The load switch disconnects the working current, the fuse disconnects the short-circuit current, and jointly disconnects any overcurrent between the working current and the full short-circuit current. At the same time, the fuse uses its impactor to open the load switch.

Main technical parameters of FZN12-10D/630 indoor vacuum load switch

serial number	project	unit	numerical value
serial number	project	unit	FN12-10D/630	FN12-10(R)D/630
one	rated voltage	KV	ten
two	rated frequency	Hz	fifty
three	rated current	A	six hundred and thirty	one hundred
four	Lightning impulse withstand voltage	kV	Ground and phase to phase 75, isolation and disconnection 85
five	1-minute power frequency withstand voltage	kV	Ground and phase 42, isolation and disconnection 48
six	Rated thermal stability current	kV	20(4S)
seven	Rated dynamic stable current	kV	fifty
eight	Rated closing current (peak value)	kV	fifty	fifty
nine	Rated short-circuit breaking current (expected value)	kA		thirty-one point five
ten	Maximum I2. t at critical breaking current	A2S		According to the characteristic curve of the fuse
eleven	Minimum breaking current	kA		According to the characteristic curve of the fuse
twelve	Rated transfer current	kA		one point five
thirteen	Maximum breaking current (reference value)	kA	one point eight
fourteen	Disconnect the capacity of the no-load transformer	kVA	one thousand two hundred and fifty
fifteen	Rated cable charging current	A	ten
sixteen	Rated active load current breaking times	time	��100
seventeen	The time for the impactor to trigger the load switch to open the circuit breaker	S		��0.06
eighteen	Grounding switch thermal stability current	kA	20��2s��	20��2s��
nineteen	Grounding switch thermal stability current (peak)	kA	fifty	fifty
twenty	Electric motor operating power supply voltage	V	AC/DC 110, 220

[Indoor high-voltage load switch]VSP5-12 Column mounted vacuum load switch

2026-6-19 19:28:23

The VSP5-12 column mounted vacuum load switch is suitable for outdoor three-phase AC distribution systems with a rated voltage of 12kV and a rated frequency of 50Hz, and is used for opening and closing load currents and closing short-circuit currents.

VSP5-12 column mounted vacuum load switch is suitable for protection and control in substations, industrial and mining enterprises, urban and rural power grids, as well as in automated distribution networks and frequently operated places.

Product structure and features:
1. Excellent breaking performance: By introducing Toshiba technology and catching up with Japanese technology, the expansion design has been carried out to increase the short-circuit current to 20kA. Vacuum arc extinguishing and SF6 gas insulation are used, and the switch has an isolation fracture connected in series with the vacuum arc extinguishing chamber, resulting in superior arc extinguishing and voltage resistance performance. The action sequence between the two is ensured by the mechanism (the vacuum arc extinguishing chamber is first disconnected and then closed, and the isolation knife is first closed and then disconnected).
2. High safety: Both arc extinguishing and insulation media are oil-free media, and explosion-proof devices are installed on the top of the box. Even in the event of an unexpected internal failure, there will be no leakage of high-temperature gases or splashes.
3. Maintenance free: The main circuit and operating mechanism of the switch are sealed in a box with SF6 gas as the medium; The main circuit of the switch is led out using cable heads or our patented corner sleeve.
4. Due to the use of zero gauge pressure SF6 gas insulation, the switch has a compact and compact size, while minimizing the risk of gas leakage. It has manual/automatic operation, making the switch operation flexible. Equipped with electromagnetic operating mechanism and electrical maintenance. Power on closing, power off opening, simple and reliable structure.
5. Flexible installation method: Column mounted lifting or sitting installation can be used.
6. Equipped with an automated distribution interface: It can be equipped with current transformers of various ratios for measurement, protection, and metering, as well as remote control auxiliary contacts.
7. High reliability: With over 30 years of vacuum equipment technology and practical experience from Toshiba in Japan, our company's comprehensive quality management system ensures high reliability in production. The SF6 gas filling pressure is zero gauge pressure, which is not prone to leakage. The reliable sealing technology ensures that the gas inside the switch can work normally for 20 years (based on our operating experience in Japan).

[Indoor high-voltage load switch]C4 series compressed air load switch

2026-6-19 19:28:15

C4 compact switch isolation switch reliably switches all types of loads, such as transformers, capacitors, overhead lines, and branch and ring lines. It can be operated under load and no load, and as a switch isolation switch or combination switch isolation switch fuse, it is a modular structure.

rated value
Rated voltage (kV)	12 - 24
Normal current (A)	400 - 1,250
Rated short-circuit closing current (kA)	40 - 63
ICE (A)	one hundred
��3 Icl (A)	forty-three
Rated current with fuse, no delay (A)	40 - 63

C4 series compressed air load switch

[Indoor high-voltage load switch]FLN36-12 Indoor AC sulfur hexafluoride load switch

2026-6-19 19:28:06

The FLN36-12 (LS2) indoor AC sulfur hexafluoride load switch is a three-phase AC 50Hz indoor device with a rated voltage of 12kV. The FLN36-12 (LS2) combination electrical appliance is composed of the FLN36-12 (LS2) indoor AC high-voltage SF6 load switch and indoor high-voltage current limiting fuse. After the impact of the fuse is activated, the load switch can automatically open. When the fault current is less than the minimum breaking current of the fuse, the load switch can operate normally to open again. This product can be used for the protection and control of electrical equipment in industrial and mining enterprises and substations.
This switch complies with the standard requirements of GB3804, GB16926, and IEC60420.

FLN36-12 indoor AC sulfur hexafluoride load switch model and meaning

Normal usage conditions
1. Altitude: �� 2000m;
2. Environmental temperature: -40 ��~+40 ��;
3. Relative humidity around: daily average not exceeding 95%, monthly average not exceeding 90%;
4. There is no obvious pollution of dust, smoke, corrosive or flammable gases, water vapor or salt in the surrounding air;
5. No frequent severe vibrations.

Technical parameters of FLN36-12 indoor AC sulfur hexafluoride load switch
1. The technical parameters of the load switch are shown in Table 1

structural characteristics
This product uses SF6 as the arc extinguishing and insulation medium. The moving contacts of the switch are sealed in a reinforced epoxy resin sealed chamber, which is filled with SF6 gas at a pressure of 1.4 bar. Install two windows made of thermoplastic material on the switch housing for observation. Each switch undergoes strict sealing performance testing and related electrical performance testing before leaving the factory, ensuring maintenance free and reliable long-term operation.
Load switches can be easily combined with fuses to become load switch fuse combination electrical appliances.
The load switch can be operated manually or electrically. The operating mechanism can be a single spring or double spring operating mechanism. Equipped with a complete set of central interlocking devices at the front end of the institution. It can avoid misoperation and is suitable for multiple interlocking methods.
The FLN36-12 (LS2) load switch has the following three states:
-Close the switch
-Open the gate
-Grounding

Ordering Instructions
When placing an order, the following items should be indicated:
1. Product model name and order quantity;
2. Rated voltage, rated current, and rated operating voltage (to be specified when electric);
3. Model of operating mechanism (K-type, A-type), manual or electric;
4. Models and specifications of fuses that can be selected in combination electrical appliances;
5. Name and quantity of spare parts (one for every four load switches on the operating handle).

[Indoor high-voltage load switch]FN25 series indoor AC high voltage load switch

2026-6-19 19:27:57

The FN25 series indoor AC high voltage load switch integrates the switch body and operating mechanism, and integrates isolation switch, load switch, and grounding switch;

The FN25-12D. FN25-12R series indoor AC high-voltage load switch and fuse combination device adopts a direct acting isolation break and vacuum arc extinguishing series arrangement, with a linkage function that operates according to a special operating procedure; 3. Cone shaped static contact insulation cover and valve structure, completely separating the busbar and load switch unit;
The vacuum load switch/valve/switch cabinet door is strictly interlocked with the "five prevention" mechanical interlocking, ensuring safety and reliability;
The vacuum arc extinguishing performance is stable and reliable, with high breaking times;
The FN25 series indoor AC high-voltage load switch adopts a spring mechanism, which can be electrically closed and opened, or manually operated, making it easy to achieve "three remote";
Compliant with GB3804, IEC60265-1, GB16926, and IEC420 standards.

Technical parameters of FN25 series indoor AC high-voltage load switch

Outline drawing

Structure Diagram

Structure Diagram

FN25-12D. FN25-12R series indoor AC high-voltage load switch and fuse combination device

[Indoor high-voltage load switch]FZN21-12 series indoor AC high-voltage vacuum load switch

2026-6-19 19:27:48

Scope of application
The FZN21-12D/630-20 indoor high-voltage load switch is suitable for use in three-phase AC 50Hz, rated voltage 12kV power supply networks, as a means of breaking load currents. Especially suitable for places that require oil-free, non maintenance, and frequent operation.
The FZN21-12D · R/125-31.5 indoor high-voltage load switch fuse combination is suitable for use in a three-phase AC 50Hz, rated voltage 12kV power supply network as a means of breaking load current, overload current, and short-circuit current. It is particularly suitable for places that require oil-free, non maintenance, and frequent operation. The load switch and combination device have obvious isolation faults and can be equipped with grounding knives and electric spring mechanisms with closing capabilities, enabling remote control.

Model and its meaning

FZN21-12 series indoor AC high-voltage vacuum load switch appearance and installation dimensions

1. Framework 2 Isolation knife 3 Fuse 4 Insulation rod 5 Upper bracket 6 Arc extinguishing chamber 7. Grounding knife static contact 8 Insulator 9 grounding knife
10. Grounding Spring 11 Knife switch spring 12 Insulation rod 13 Spindle 14 Release mechanism 15 Payshaft 16 Linkage rod 17 Operating mechanism
Load switch without fuse item (3) and trip mechanism item (14)

FZN21-12 series indoor AC high-voltage vacuum load switch main technical parameters 1. Main technical parameters of load switch

2. Technical parameters of composite electrical appliances

3. Technical parameters for assembly and adjustment of vacuum arc extinguishing chamber

4. Technical parameters of fuses equipped with composite electrical appliances

Ordering Instructions
1. Product model, name, specifications, and quantity; 2. Rated voltage and rated current; 3. Rated voltage of operating mechanism; 4. With or without grounding switch and fuse; 5. With or without an operation panel; 6. The name, specifications, and quantity of spare parts.

[Indoor high-voltage load switch]FN12-12 series indoor high-voltage load switch

2026-6-19 19:27:39

The combination of FN12-12 and FN12-12R is a three-phase high-voltage switchgear with a rated voltage of 12kV and a rated frequency of 50Hz. Used for dividing and combining load current, closed-loop current, no-load transformer and cable charging current, and closing short-circuit current. Load switches equipped with grounding switches can withstand short-circuit currents and are mainly used in urban distribution and industrial electrical equipment for three-phase ring networks or terminal power supply, as load control and short-circuit protection.

·Overview
FN12-12D/630-20 indoor AC high voltage load switch (hereinafter referred to as FN12-12D load switch) is a three-phase high voltage switchgear with a rated voltage of 12KV and a rated frequency of 50Hz. It is used for switching load current, closed-loop current, no-load transformer and cable charging current, and short-circuit current. Load switches equipped with grounding switches can withstand short-circuit currents.
The FN12-12D. R/100-31.5 indoor AC high voltage load switch fuse combination (hereinafter referred to as FN12-12D. R combination) is an indoor high voltage switchgear that combines the FN12-12D load switch with the S �� LAJ-12 (XRNT �� -12) high voltage current limiting fuse. It can reliably disconnect any current up to the short-circuit current: load switch disconnects the working current, fuse disconnects the short-circuit current, and jointly disconnects any overcurrent between the working current and the full short-circuit current, while the fuse opens the load switch through its impactor.

·FN12-12 series indoor high-voltage load switch model and meaning

·Normal working environment
1. Surrounding air temperature: upper limit+40 ��, lower limit -25 ��.
2. The altitude is 1000m and below.
3. Relative humidity: Monthly average not exceeding 90%, daily average not exceeding 95%.
4. The surrounding air should not be significantly polluted by corrosive or flammable gases, as well as steam gases.
5. No frequent vigorous exercise.
6. Pollution resistance level: Level II.
If the usage conditions exceed the above regulations, they shall be determined through consultation between the user and the manufacturer.

·Technical parameters and performance

serial number	project	unit	FN12-12D/630-20	FN12-12D.R/100-31.5
one	rated voltage	kV	twelve
two	rated frequency	Hz	fifty
three	rated current	A	six hundred and thirty	one hundred
four	Lightning impulse withstand voltage	kV	Ground and phase to phase 75, isolated and disconnected 85
five	1-minute power frequency withstand voltage	kV	To ground and phase 42, isolate and disconnect 48
six	Rated thermal stability current	kA	20��4S��
seven	Rated dynamic stable current	kA	fifty
eight	Rated closing current (peak value)	kA	fifty
nine	Rated short-circuit breaking current	kA		thirty-one point five
ten	Rated transfer current	kA		one point five
eleven	Maximum breaking current (reference value)	kA	one point eight
twelve	Disconnect the capacity of the no-load transformer	Kva	one thousand two hundred and fifty
thirteen	Rated cable charging current	A	ten
fourteen	Rated active load current breaking times	time	>100
fifteen	The time when the impactor triggers the load switch to open	S		>0.06
sixteen	Grounding switch thermal stability current	kA	20��2S��	20��2S��
seventeen	Grounding switch thermal stability current (peak)	kA	fifty	fifty
eighteen	Electric motor operating power supply voltage	V	AC220��DC48

·FN12-12 series indoor high-voltage load switch mechanical characteristic parameters

serial number	project	unit	FN12-12D/630-20	FN12-12D.R/100-31.5
one	Auxiliary contact opening distance	mm	>155
two	Synchronization of three-phase opening and closing	ms	<3
three	Just divided speed	m/s	>2.8	2.80+0.4
four	Just closed speed	m/s	>3.8
five	Grounding switch fracture distance	mm	145 ± 5
six	main circuit resistance	�̦�	<120	<300
seven	Maximum operating force distance	N.m	<160	<180

·Main technical parameters

serial number	model		Rated current for melting (A)	Capacity of transformer (kVA)
serial number	UK model	National standard model	Rated current for melting (A)	Capacity of transformer (kVA)
one	SDLAJ-12	XPNT��-12	sixteen	100��125��160
two			twenty	two hundred
three			twenty-five	two hundred and fifty
four			thirty-one point five	three hundred and fifteen
five			forty	four hundred
six	SFLAJ-12		fifty	five hundred
seven			sixty-three	630��800
eight			eighty	one thousand
nine	SSLAJ-12		one hundred	one thousand two hundred and fifty
ten	SKLAJ-12		one hundred and twenty-five	one thousand and six hundred

[Indoor high-voltage load switch]FN7-12DR AC High Voltage Load Switch

2026-6-19 19:27:31

FN7-12R AC high voltage load switch is a new type of gas producing indoor high voltage load switch, suitable for use in three-phase AC power systems with AC 50Hz and rated voltage 12kV, as a means of breaking load current and closing short-circuit current.

Environmental conditions for use
1. Surrounding air temperature
Upper limit:+40 ��
Lower limit: 10 �� in general areas, -25 �� in high cold areas
2. Altitude
The altitude is 1000m and below.
3. Relative humidity, daily average not exceeding 95%, monthly average not exceeding 90%
4. The surrounding air should not be significantly polluted by corrosive or flammable gases and water vapor.
5. No frequent and intense vibrations.

Main Technical Parameters of FN7-12DR AC High Voltage Load Switch

Main specifications

[Indoor high-voltage load switch]FN5 series indoor AC high voltage load switch

2026-6-19 19:27:22

The FN5-12 indoor AC high-voltage load switch (hereinafter referred to as the load switch) is suitable for use in AC 50Hz, 12kV networks, as a means of breaking load currents and closing short-circuit currents. Load switches with fuses can cut off short-circuit currents and serve as protective switches.
The load switch can be equipped with CS6-1 mobile phone operating mechanism, CS �� manual operating mechanism dedicated to this product, or CJ �� electric operating mechanism.

Model and its meaning

Environmental conditions for use
1. Altitude not exceeding 1000m;
2. Surrounding air temperature: upper limit+40 ��, lower limit -25 �� (electric mechanism not lower than -5 ��);
3. Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90% (+25 ��);
4. The surrounding air should not be significantly polluted by corrosive or flammable gases, water vapor, etc;
5. No frequent severe vibrations.

Main technical parameters of FN5 series indoor AC high-voltage load switch

Note: The grounding part of FN5-12D load switch also has short-circuit closing capability.

Appearance and installation dimensions
The appearance and installation dimensions of FN5-12 load switch are shown in Figure 1.
The appearance and installation dimensions of FN5-12D load switch are shown in Figure 2.
The appearance and installation dimensions of FN5-12R load switch are shown in Figure 3.
The appearance and installation dimensions of the FN5-12DR load switch are shown in Figure 4.
The appearance and installation dimensions of FN5-12R (S) load switch are shown in Figure 5.
The appearance and installation dimensions of FN5-12DR (S) load switch are shown in Figure 6.

1. Base frame 2. Post insulator 3. Support terminal block 4. Contact blade 5. Arc extinguishing tube 6. Twisted spring and torsion spring lock shaft 7. Guide plate 8. Contact terminal block
9-Pull rod 10 Rotary shaft 11 Spring energy storage mechanism 12 Operating panel

Figure 1 Outline drawing of FN5-12 load switch

1. Base frame 2. Grounding contact blade 3. Grounding switch shaft 4. Pillar insulation 5. Grounding contact seat 6. Support wiring board 7. Load switch contact blade 8. Arc extinguishing tube 9. Twisted spring and torsion spring pin shaft 10. Guide plate 11. Contact seat wiring board 12. Pull rod 13. Load switch shaft 14. Load switch spring energy storage structure 15. Grounding switch spring energy storage mechanism 16. Load switch operation panel 17. Grounding switch operation panel 18. Interlocking mechanism

Figure 2 Outline drawing of FN5-12D load switch

1-FN5-12 load switch 2-support fuse terminal block 3-pillar insulator 4-grounding contact seat
Figure 3 Outline drawing of FN5-12R load switch

1-FN5-12D load switch 2-support fuse terminal block 3-fuse tube 4-interlocking mechanism 5-fuse terminal block 6-fuse base
Figure 4 Outline drawing of FN5-12DR load switch

1-FN5-12 load switch 2-support fuse terminal block 3-fuse tube 4-fuse terminal block 5-fuse base
Figure 5 Outline drawing of FN5-12R (S) load switch

1-FN5-12D load switch 2-support fuse terminal block 3-fuse tube 4-fuse terminal block 5-fuse base 6-edge locking mechanism
Figure 6 Outline drawing of FN5-12DR (S) load switch
Ordering Instructions
When placing an order, the following items should be specified:
1. The model, name, and quantity of the load switch.
2. If equipped with a fuse, please indicate the model, rated voltage, and rated current of the fuse.
3. The model of the accompanying institution.

[Indoor high-voltage load switch]FN3-12 series indoor high-voltage load switch

2026-6-19 19:27:13

FN3-12 series indoor high-voltage load switch

Technical parameters of FN3-12 series indoor high-voltage load switch

FN3-12 series indoor high-voltage load switch appearance structure

Installation diagram of FN3-12 series indoor high-voltage load switch

FN3-12 series indoor high-voltage load switch