Process for protecting against the failure of a circuit breaker

摘要

The fault protection method has a circuit breaker with contacts moving from an open to closed position. The mechanism has an electromagnetic coil actioner. When the contact breakers operate, the current in the circuit breaker is examined, during a set time period (7). If the current during this time period swings around, then a fault has been detected and the alarm is raised, otherwise if the current is steady the switching is verified.