Shanghai Huabang Industrial Business Network - Outdoor 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