High voltage switchgear is mainly used in power plants, substations, petrochemical, metallurgical rolling, light industrial textile, factories and mining enterprises, residential areas, high-rise buildings and other different places, high voltage switchgear has overhead incoming and outgoing lines, cable incoming and outgoing lines, bus connection and other functions. So, what are the components of the high voltage switchgear? What are its electrical components? What should I pay attention to? The following xiaobian teach you to understand all aspects of high - voltage switchgear.

Components of high voltage switchgear:

1. Cabinet body and circuit breaker are composed of two major parts;

2. The cabinet body is composed of shell, electrical components (including insulation parts), various mechanisms, secondary terminals and connecting wires;

The materials of the high-voltage switchgear are: cold-rolled steel plate or Angle steel plate (for welding cabinet), aluminum-zinc steel plate or galvanized steel plate (for assembly cabinet), stainless steel plate (non-magnetic), aluminum plate (non-magnetic);

Functional units of cabinet: main bus room, circuit breaker room, cable room, relay and instrument room, cabinet top small bus room;

The common electrical components in the high-voltage switchgear are as follows:

Current transformer (CT);

Voltage transformer (PT);

Ground switch;

Lightning arrester;

Disconnecting switch;

High voltage circuit breaker;

High pressure contactor;

High voltage fuse;

Transformer;

High voltage live display;

Insulation parts;

High voltage reactor;

Load switch;

High voltage single-phase shunt capacitor;

Main secondary electrical components commonly used in high-voltage switchgear include the following equipment:

Relay, ammeter, ammeter, voltmeter, power meter, power factor meter, frequency meter, fuse, air switch, switch, signal lamp, resistance, button, microcomputer integrated protection device, etc.

Notes for high voltage switchgear:

1. After the vacuum circuit breaker trolley in the high-voltage switchgear closes at the test position, the trolley circuit breaker cannot enter the working position. (prevent load closing)

2. When the grounding knife in the high-voltage switch cabinet is in position, the car circuit breaker cannot enter the working position to close the switch. (prevent grounding wire from closing)

3. When the vacuum circuit breaker in the high-voltage switchgear is closing, the front and back doors of the dish cabinet are locked by the machine on the grounding knife and the cabinet door. (prevent errant charging interval)

4. The vacuum circuit breaker in the high-voltage switchgear closes when working, and the grounding knife cannot close and put in. (prevent live grounding)

5. The vacuum circuit breaker in the high-voltage switch cabinet cannot exit the working position of the trolley circuit breaker when the circuit is closed. (prevent pulling brake with load)

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