"Mistaken together" because the circuit breaker may have: a DC circuit CKS, two negative ground, so closing the control loop is switched on. 2, the automatic reclosing of a component failure within the relay control circuit switched (such as internal error relay normally open contact closure) Yiyang vacuum circuit breakers, circuit breaker closing. 3, closing the contactor coil resistance is too small, and the starting voltage is low, when the DC system instantaneous pulse will cause nuisance breaker closing. Common faults and mechanical failures of electrical circuits are described as follows. 1, 2 electrically common failure, mechanical failure of one common) actuator rod fall off. 2) closing the core jam. 3) After opening the circuit breaker mechanism not revert to the pre-engagement position. 4) trip trip mechanism. 5) closing the solenoid operating voltage is too high vacuum breaker Hefei, failed to hang the hook. 6) did not return opening link. 7) organization stuck a pin connecting portion of the shaft off, so that organizations empty fit. 8) sometimes several times in a row to make switching action breaker closing, then the Department of auxiliary switch normally closed contacts to open prematurely. Changsha vacuum circuit breaker | Vacuum breaker | Huayi electricity provided by Xian Huayi power plant. Xian Huayi power plant (www.xahy.com) strong, credible, in Xi'an high-voltage circuit breakers and other industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Huayi power and you hand into the brilliant, for a better future!