Title :
Practical application of diagnostic method of circuit breaker by measuring three current waveforms
Author :
Watanabe, T. ; Sugimoto, T. ; Imagawa, H. ; Chan, K.K. ; Chew, T.Y. ; Qin, S.Z.
Author_Institution :
Chubu Electr. Power Co., Nagoya
Abstract :
This paper describes a practical application of diagnostic technique that captures abnormalities of motor-spring driven-type circuit breaker (CB) by measuring three currents and evaluating the shape of their waveforms. The proposed diagnostic technique has been applied to 117 units of 22 kV vacuum circuit breakers (VCB) in Singapore. This application has detected 15 abnormal VCB units and 33 other units with symptoms of abnormality. The development and practical application of the new diagnostic technique has prevented VCB operation failures and improved the power supply reliability of 22 kV distribution system.
Keywords :
electric current measurement; motor drives; power distribution faults; power distribution reliability; vacuum circuit breakers; Singapore; diagnostic method; distribution system; motor-spring driven-type circuit breaker; operation failures; power supply reliability; three current waveforms; vacuum circuit breakers; AC motors; Circuit breakers; Coils; Condition monitoring; Current measurement; DC motors; Electromagnetic measurements; Manufacturing; Springs; Substations; AC motor drives; Circuit breakers; Current measurement; DC motor drives; Monitoring; Substation; Vacuum circuit breakers; Waveforms;
Conference_Titel :
Condition Monitoring and Diagnosis, 2008. CMD 2008. International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-1621-9
Electronic_ISBN :
978-1-4244-1622-6
DOI :
10.1109/CMD.2008.4580311
