About diagnosis of circuit breakers

On-line monitoring of electrical equipment and their diagnosis is a field which has special attention because it can detect some faults in their incipient phase and thus prevent serious failure of the equipment and also prevent financial and materials related losses. This paper presents a system for monitoring and diagnosis of electrical equipment of medium voltage installations. Also are presented the evolutions and values of some parameters considered important for knowledge of technical condition of a circuit breaker, in case of abnormal operating conditions, and comparing them with similar records considered of reference. Advanced processing and data analysis was performed by using a software application developed in LabVIEW programming environment.