protective circuit breaker

The circuit breaker after getting command from the protective relay, disconnects only the faulted element.

从后得到的保护继电器命令断路器, 只有断开故障因素.

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Improvement on Protective Lock of Disconnecting Switch and Control Circuit of Circuit Breaker of Transformer Two Terminals

隔离开关的防护锁及变压器两端断路器控制回路的改造

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This paper introduces the fault finding procedure of frequently and secretly trips for circuit breaker at mid-voltage side of a 110 kV substation on the following aspects: secondary circuit, harmonic effect, protective device, etc. A treatment method is also offered as a reference.

针对某110kV变电站主变中压侧开关频繁偷跳的现象，从二次回路、谐波影响、保护装置等方面介绍了故障排查过程，井给出了解决办法。

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On Protecting Speed Regulating System Of Circuit-Breaker of Electrical Fork Lift Truck& a piece of protective circuit board

电瓶车调速系统的保护&一块有保护功能的控制电路板

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