We all know high - voltage switchgear manufacturers of high - voltage switchgear performance stability, reliable quality, perfect after-sales service. So why is the high - voltage switchgear manufacturers of high - voltage switchgear so excellent? The following by billion electrical high voltage switchgear manufacturers for you to elaborate on the three characteristics of high voltage switchgear.

I. high voltage switchgear from the perspective of definition:

High-voltage switchgear is used in power system, power generation, transmission, distribution, conversion and energy consumption on and off, control or protection role, 3.6 kV ~ 550 kV voltage class in electrical products, mainly including high voltage circuit breaker, high-voltage disconnector and earthing switch, high voltage load switch, high-pressure automatic reclosing and section, high pressure operating mechanism, high voltage explosion-proof devices and high voltage switch cabinet and so on several broad categories. High voltage switch manufacturing industry is an important part of power transmission and transformation equipment manufacturing industry and occupies a very important position in the whole power industry.

The high voltage switchgear has the functions of overhead incoming and outgoing line, cable incoming and outgoing line, bus connection, etc. Mainly used in power plants, substations, power system substations, petrochemical, metallurgical rolling, light industry and textile, factories and mining enterprises, residential areas, high-rise buildings and other different places. The switch cabinet shall meet the relevant requirements of the standard of "ac metal enclosed switchgear", which consists of two major parts of cabinet and circuit breaker, and cabinet is composed of shell, electrical components (including insulation parts), various mechanisms, secondary terminals and wiring.

Ii. High voltage switchgear from the perspective of technical parameters:

1. Rated voltage, rated current, rated frequency, rated power frequency withstand voltage, rated lightning shock withstand voltage;

2. The circuit breaker is rated with moderate breaking current, rated peak closing current, rated short-term withstand current, rated peak withstand current;

3. Ground switch rated peak electricity rated short time withstand current, rated peak withstand current;

4.Rated voltage, dc resistance and power of switching coil, rated voltage and power of energy storage motor;

5. Cabinet protection grade and national standard no.

Three, high voltage switch cabinet judging from the closing fault:

Closing fault can be divided into electrical fault and mechanical fault. The closing mode is manual and electric. Failure to close manually is usually a mechanical failure. You can close the gate manually. Failure to close the gate electrically is an electrical fault.

1. Protective action

2. Fault protection

3, electrical chain fault

4, the control circuit open fault

5, closing coil fault

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