A、可以隔离电源，有明显的断开点，多用于固定式高压设备。
A. It can isolate the power supply and has obvious breaking point. It is mostly used in fixed high-voltage equipment.
B、没有灭弧装置，在合闸状态下可以通过正常工作电流和短路电路。
B. Without arc extinguishing device, normal working current and short circuit circuit can be used in the closing state.www.gaoyasantong.cnwww.buxiugangsantong.cnwww.chongyawantou.cn www.duihanwantou.cnwww.wantou.org.cnwww.falan.net.cn
C、严禁带负荷接通和断开电路，常与高压断路器串连使用。
C. It is strictly forbidden to turn on and off the circuit with load. It is often used in series with high voltage circuit breakers.