Improvement of voltage switching circuit of JFZ-12B phase separated operation box

Abstract

Abstract:

Abstract:JFZ phase separator operation box is widely used in the high voltage circuit breaker of the power plant.There occurred an accident that a 330kV bus protection failed to act in a certain power plant.The failure was analyzed and the results showed that it was the failure of the voltage switch that caused the accident.As for the problem of the voltage switch,new project was put forward. The project prevent the switches form secondary accidents caused by bad contacts effectively.

Key words: ">Keywords:">voltage switch, return circuit, protection, accident ">analysis

MA Yonghui，CHEN Jun，ZHANG Jianfeng. Improvement of voltage switching circuit of JFZ-12B phase separated operation box[J]. Huadian Technology, 2015, 37(12): 4-6.

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Improvement of voltage switching circuit of JFZ-12B phase separated operation box

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