News
The first large-capacity test system for mining high-voltage electrical appliances in China successfully passed the acceptance test
Recently, the general contracting project of breaking and closing test system engineering of mine high-voltage electrical appliances of China Coal Science and Industry Group Chongqing Company, which was designed, purchased, installed and commissioned by China Qiyuan Engineering Design Institute Co.,......
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Circuit breaker trips during normal operation
Cause analysis: In the normal operating state of the circuit breaker, the circuit breaker does not open when there is no external operating power supply and mechanical opening action. After confirming that there is no misoperation, check the secondary circuit and the operating mechanism. It was foun......
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