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Dongli Electric

Do you know the basic knowledge of Wuxi high and low voltage switchgear?


Release time:

2020-09-21

Wuxi high and low voltage switchgear and control cabinets are used as electrical equipment for power transmission, distribution and power conversion. It is used to control power generation, transmission, distribution, power conversion and power consumption equipment. The product has a simple and reliable "five-proof" interlocking function to prevent misoperation. The appearance is novel, flat, simple, uniform color, thickness coordination. The secondary trunking of the high-voltage machine room adopts all-metal protection, which makes the operation safer and more reliable. It has a more humane man-machine interface, explosion-proof operation and other characteristics.

Wuxi high and low voltage switchgearAnd control cabinets are used as electrical equipment for power transmission, distribution and power conversion. It is used to control power generation, transmission, distribution, power conversion and power consumption equipment. The product has a simple and reliable "five-proof" interlocking function to prevent misoperation. The appearance is novel, flat, simple, uniform color, thickness coordination. The secondary trunking of the high-voltage machine room adopts all-metal protection, which makes the operation safer and more reliable. It has a more humane man-machine interface, explosion-proof operation and other characteristics.


1. what is a switchgear

Switch cabinet is a kind of electrical equipment. The external line of the switch cabinet is advanced into the main control switch in the cabinet, and then into the auxiliary control switch, and each branch is set according to the needs. Such as instrumentation, automatic control, motor electromagnetic switches, all kinds of AC contactors, etc., some also have a high-voltage chamber and low-voltage chamber switch cabinet, high-voltage bus, such as power plants, etc., some also have a low-cycle protection of the main equipment load rejection.


The role of 2. switch cabinet

The main function of switchgear is to open and close, control and protect electrical equipment during the power generation, transmission, distribution and power conversion of the power system. The components in the switchgear are mainly composed of circuit breakers, isolating switches, load switches, operating mechanisms, transformers and various protection devices.


Five prevention of 3. switch cabinet

1. After the vacuum circuit breaker trolley in the high-voltage switchgear is closed in the test position, the trolley circuit breaker cannot enter the working position. (Prevent closing with load)

2. When the grounding knife in the high-voltage switchgear is in the closed position, the trolley circuit breaker cannot be closed. (Prevent closing with ground wire)

3. When the vacuum circuit breaker in the high-voltage switchgear is closed, the back door of the panel is locked on the grounding knife together with the machine. (Prevent charging interval by mistake)

4. The vacuum circuit breaker in the high-voltage switchgear will be closed when working, and the grounding knife cannot be opened. (Prevent live ground wire from hanging)

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


Classification of 4. switchgear

There are many classification methods of switchgear, mainly:

1. According to the installation method of the circuit breaker, it can be divided into movable switch cabinet and fixed switch cabinet;

2. According to the different cabinet structure, it can be divided into open switch cabinet, metal enclosed switch cabinet and metal enclosed armored switch cabinet.

3. According to the different voltage levels, it can be divided into high-voltage switchgear, medium-voltage switchgear and low-voltage switchgear.


































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