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Dongli Electric

The role of high and low voltage switchgear


Release time:

2020-08-13

High and low voltage switchgear and control cabinet are used as electrical equipment for power transmission, distribution and electric energy conversion. They are used for control of power generation, transmission, distribution, electric energy conversion and electric energy consumption equipment. The product has simple and reliable "five prevention" interlocking function to prevent misoperation. The appearance is novel, smooth, concise, uniform in color and thick and heavy in proportion. The secondary wire trough in the high voltage chamber adopts all-metal protection, which makes the operation safer and reliable, it has more humanized man-machine interface, explosion-proof operation and so on.

High and low voltage switchgearAs electrical equipment for power transmission, power distribution and power conversion, the control cabinet is used for power generation, power transmission, power distribution, power conversion and power consumption equipment control. The product has simple and reliable "five-prevention" interlocking function to prevent misoperation. The appearance is novel, smooth, concise, uniform in color and coordinated in thick and heavy proportion. The secondary trunking in the high-voltage room adopts all-metal protection, which is safer and more reliable in operation and has a more humanized man-machine interface, explosion-proof operation and other features.

1.High and low voltage switchgearWhat is it?

Switch cabinet is a kind of electrical equipment, switch cabinet outside the advanced into the cabinet of the main control switch. Then enter the sub-control switch, and set each branch according to its needs. Such as instrumentation, automatic control, motor magnetic switch, all kinds of AC contactors, etc., some also set up high-voltage room and low-voltage room switch cabinet, with high-voltage bus. For example, power plants, some also have low-cycle load reduction for major equipment.

2.High and low voltage switchgearThe role

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

3.High and low voltage switchgearthe five defense

1. After the vacuum circuit breaker trolley in the high-voltage switch cabinet is closed at 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 switch cabinet is closed. The trolley circuit breaker cannot be closed. (Prevent closing with grounding wire)

3. When the vacuum circuit breaker in the high voltage switch cabinet is closed. The rear door of the panel cabinet is locked with the machinery on the grounding knife. (Prevent stray entry into live interval)

4. The vacuum circuit breaker in the high voltage switch cabinet is closed when working. The combined ground knife cannot be put into operation. (to prevent electrified ground wire hanging)

5. The vacuum circuit breaker in the high voltage switch cabinet is in operation. Unable to exit the working position of the trolley circuit breaker. (Prevent pulling knife switch with load)