Nalysis and Prediction of Guided Frame Circuit Breaker Pulling Arc
This article proposes technical and management improvements based on the actual situation of arcing and contact burning during the use of the guided frame circuit breaker,which occurs when the con-necting row contacts and frame bus contacts fail.When a fault arc occurs,its current does not reach the tripping current set by the release.After disassembling the rocker mechanism for the position indication of the faulty circuit breaker,it was found that the position indication was worn out,and the non-standard oper-ation of the staff caused the stop plate to break,resulting in an arcing accident of the circuit breaker.The preventive measures formulated based on the above situation are:regularly check the position indication of the rocking mechanism;Wear or fracture of the stopper.Provide formal training for operators.
万方数据
维普
