断路器的作用是切断和接通负荷电路，以及切断故障电路，防止事故扩大，保证安全运行。而高压断路器要开断1500V，电流为1500-2000A的电弧，这些电弧可拉长至2m仍然继续燃烧不熄灭。故灭弧是高压断路器必须解决的问题。
The function of the circuit breaker is to cut off and connect the load circuit, and cut off the fault circuit, prevent the accident from expanding, and ensure the safe operation. The high-voltage circuit breaker to break 1500V, current 1500-2000A arcs, these arcs can be extended to 2m still burning non-extinguishing. Therefore, arc extinguishing is a problem that must be solved by high voltage circuit breaker.