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The Role Of Circuit Breakers
Sep 04, 2018

The function of the circuit breaker is to cut off and turn on the load circuit, and cut off the fault circuit, prevent the accident to enlarge and ensure safe operation. The high-voltage circuit breaker to open 1500V, the current is 1500-2000a arc, these arc can be elongated to 2m still continue to burn not extinguished.

So the arc extinguishing is a problem that must be solved by HV circuit breaker. The principle of arc-blowing is that the cooling arc weakens the heat free, and on the other hand, the composite and diffusion of charged particles is strengthened by the arc-blowing, and the charged particles in the arc gap are blown away, and the dielectric strength is quickly restored.

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