LIU Yang, BAI Shu-bin. Analysis of a Circuit Breaker Abnormal-opening Fault Caused by Hydraulic Oil[J]. High voltageapparatus, 2009, 45(3): 164-165.DOI:
By analyzing an abnormal-opening fault happened at the time circuit breaker(type LW12-500) was operating in power-off condition
we find that the hydraulic oil of low quality in the hydraulic mechanism of the circuit breaker caused the fault.The hydraulic oil degrades to form solid impurities in it after a period of operation
which may result in fault in the hydraulic mechanism.