APPARATUS AND METHOF FOR DIAGNOSING PERFORMANCE CHARACTERISTICS OF A CIRCUIT BREAKER IN A STATE OF LIVE WIRE

摘要

The purpose of the present invention is to provide a device and a method for diagnosing the operating characteristics of a circuit breaker capable of diagnosing a closed coil and/or the resistance and/or inductance of a trip coil. According to one preferred embodiment of the present invention, the diagnostic device comprises an event detection module which detects whether or not an event occurs in a coil on a control circuit; and a diagnostic module which applies a diagnosis voltage to a diagnosed coil by corresponding to the detection where there is no event in the coil by the event detection coil and which diagnosis at least one among the resistance and inductance of the diagnosed coil using the applied diagnosis voltage and current on the diagnosed coil. [Reference numerals] (10) Relay;(1000) Diagnostic device;(AA) Tripping signal