FZW-15 Outdoor AC High Voltage Vacuum Load Isolation SwitchDetailed product description：

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	μΩ	≤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.