High voltage cabinet XGN2-12

Uses

The XGN2-12 box-type fixed metal-enclosed switchgear is a high-voltage switchgear system developed and researched by Xi'an Electrical Research Institute. The primary components used in the equipment have all been redesigned, offering higher insulation levels and protection ratings compared to the currently widely used drawer-type switchgear and GG-1 (A) F type switchgear. No interphase or relative ground barriers or insulating gases are used inside the equipment, and no secondary plugs are employed in the secondary circuit (meaning that regardless of the operating state of the equipment, the protection and control circuits remain continuously connected). This product is designed for use in 3-10kV single busbar systems with bypass systems as high-voltage switchgear for receiving and distributing electrical energy. The product meets the "five-prevention" requirements. All specifications comply with GB3906 "3-35kV AC Metal-Enclosed Switchgear" and IEC298 technical standards.

Environmental conditions used

1. Upper limit of ambient temperature +40℃ lower limit-25℃ (indoor);

2. Altitude 1000m;

3. The daily average relative humidity is not greater than 95%, and the monthly average is not greater than 90%;

4. The intensity of the earthquake shall not exceed 8 degrees;

5. Places without fire, explosion danger, serious pollution, chemical corrosion and violent vibration.

Order Instructions

The following information must be provided by the user when placing an order

A. Main wiring scheme number and busbar system diagram, arrangement diagram;

B. Secondary circuit wiring schematic diagram and terminal arrangement diagram, if there is no terminal arrangement diagram, according to the manufacturer's regulations;

C. The model, specification and quantity of electrical components in the switch cabinet;

D. The material and specification of the main busbar and branch busbar shall be supplied according to the manufacturer's regulations;

e. The use of switch cabinets in special environmental conditions shall be specified at the time of order;

When accessories and spare parts are required, their types and quantities shall be specified.

Main technical parameters of switchgear

Structure and error prevention device

1. Structure

This switch is a metal-enclosed box structure, with the cabinet frame welded from angle steel. Inside the cabinet, steel plates divide it into a circuit breaker room, busbar room, cable room, and relay room. The operation of the main components inside can be observed through the observation window and lighting on the door. To enhance the technical performance of the switch cabinet, major components have been redesigned (such as circuit breakers and rotary isolating switches). According to the layout of the cabinet, relays can be installed in the relay room, signal relays, indicating instruments, and signal lights can be mounted on the door, and transfer switches can be installed in the operating small room. The rear part is the busbar room, and the bottom part is the cable room, allowing users to conveniently perform wiring. The front part is the circuit breaker room, facilitating maintenance of the switch cabinet. For details on the internal structure of the cabinet, refer to Figures 1 and 2 and the product manual.

2. Error prevention device

The "five prevention" functions are: to prevent the wrong opening and closing of circuit breakers; to prevent the wrong opening and closing of isolating switches under load; to prevent the closing of grounding switches under power; to prevent the connection of power supply when the grounding switch is closed; to prevent entering the live interval.

This switch cabinet adopts the forced mechanical locking mode, and the locking device is composed of the main components such as bracket, disk, panel, lock plate, handle and connecting rod. It has the characteristics of reliable performance, complete functions, simple structure and convenient operation, so as to simply and effectively achieve "five prevention":

(1) Control switches with red and green flip cards (KW switches) are used in circuit breaker schemes to prevent misoperation and misoperation of circuit breakers due to wrong intervals;

(2) Only after the circuit breaker has indeed opened can the small handle be pulled out from the "working" position and turned counterclockwise to the "open lock" position; open and close the disconnect switches; preventing the opening and closing of disconnect switches under load, the reversibility of interlocks and reverse interlocks provides dual error prevention functions, that is: when the small handle is in the "open lock" position, it can only close and open the upper and lower disconnect switches, not the circuit breaker, thus avoiding the misoperation of closing the circuit breaker;

(3) When the circuit breaker and the upper and lower isolating switches are in the closed state, and the small handle is in the "working" position, the front and rear cabinet doors cannot be opened to prevent entering the live interval by mistake;

(4) When the upper and lower disconnect switches are not open, the grounding switch cannot close; the small handle cannot be rotated from the "open lock" position to the "maintenance" position, which prevents hanging the grounding wire while energized; if the grounding switch is open, the upper and lower disconnect switches cannot close, preventing the closing of the upper and lower disconnect switches with the grounding wire still connected.