The five preventions of high voltage switch cabinet of complete electrical equipment manufacturer are as follows:
1. Avoid opening and closing the barrier switch with load. (the circuit breaker, load switch and contactor cannot operate the blocking switch under closing condition.)
2. Avoid opening and closing circuit breaker, load switch and contactor by mistake. (as long as the operation instruction corresponds to the operating equipment, the operated equipment can be operated.)
3. Avoid closing the circuit breaker and load switch when the grounding switch is in the closed position. (as long as the grounding switch is in the opening state, the blocking switch can be closed or the handcart can enter the operation position, and the circuit breaker and load switch can be closed.)
4. Avoid closing the grounding switch by mistake when electrified. (only when the circuit breaker is open, the barrier switch or handcart can be operated, the operation position can be retreated to the test position, and the grounding switch can be closed.)
5. Avoid entering the live interval by mistake. (only when the compartment is not electrified, the door can be opened to enter the compartment.) the "five preventions" of the power transformation and distribution room are fire prevention, waterproof, lightning protection, snow prevention and small animals prevention. "One pass" means keeping ventilation.
The completion of electrical "five prevention" function has become one of the important measures for the safe production of electric power. With the continuous development of the power grid and the continuous updating of technology, the error prevention device has been continuously improved and perfected.
High voltage distribution cabinet, also known as high-voltage switch cabinet, is used for power generation, transmission, distribution, energy conversion and consumption of power system, such as on-off, control or protection effect. High voltage switch manufacturing industry is an important part of power transmission and transformation equipment manufacturing industry, which occupies a very important position in the whole power industry.
The general voltage level of electrical equipment is 3.6kV ~ 550kV, mainly including high-voltage circuit breaker, high-voltage barrier switch and grounding switch, high-voltage load switch, high-voltage active reclosing and sectionalizer, high-voltage operating mechanism, high-voltage explosion-proof power distribution device and high-voltage switch cabinet.
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