Analysis Of The Phenomenon Of High-voltage Disconnecting Switch Failing To Close Completely.

In the operation of substations and power distribution systems, the phenomenon of incomplete closing of circuit breaker hv isolator is not uncommon. This situation directly affects the accuracy of hv isolator switch's determination of its operating status and the accuracy of its action feedback. Incomplete closing of the high voltage electrical isolator circuit breaker is often caused by abnormal conditions in the mechanical devices and transmission mechanisms. These include increased friction between contacts, jamming of the transmission mechanism, and deviation of the stationary contact position from its design positioning. Corrosion and insufficient lubrication caused by long-term outdoor operation of the isolator high voltage circuit breaker can prevent the stationary and moving contacts from completing their intended action, leading to incomplete closing.