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Effective and efficient circuit breaker analysis

Effective and efficient circuit breaker analysis

Jeyaraj, S.G. and Habtay, Yehdego (2011) Effective and efficient circuit breaker analysis. In: IET Conference on Reliability of Transmission and Distribution Networks (RTDN 2011), 22-24 November 2011, London, UK.

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Worldwide utilities and industries have seen various technological advancements in circuit breaker (CB) testing and analysing. Yet most of the owners underperform the maintenance activity when it comes to circuit breaker maintenance and many limit themselves to an operating time test or a static contact resistance test using inappropriate test equipment. The reasons cited for this were 'complicated test procedures which involve longer outage time on the feeder', 'lack of availability of the feeder for maintenance' and 'lack of permission to remove the earth rod or earth switch while the breaker was in shutdown condition'. Also the decision making process and pin pointing the fault in a breaker after performing a basic circuit breaker test will often be a challenge. Though the basic tests like timing test on a circuit breaker provides preliminary information about the breaker condition, actual condition of a deteriorating breaker becomes obvious in a well matured state and often revealed only by a catastrophic failure while in service. Different utilities, switch gear manufacturers, researchers and test equipment manufacturers have stressed the importance of various advanced test methodologies to save time and money. Those tests include coil current analysis, dynamic resistance measurement, testing on dual ground conditions, vibration testing, first trip analysis, online testing and so on. These circuit breaker testing technologies often provide critical information of the circuit breaker and make the decision making process simple. Pinpointing the fault in a circuit breaker and attempting the maintenance activity in a very short time will be complicated if the directions guided by the test methodologies or equipment are not clear enough or easy enough. Also one particular method, tool or technology will never provide

Item Type: Conference or Conference Paper (Paper)
Uncontrolled Keywords: Circuit breakers, Decision making, Maintenance engineering, Witchgear testing, Circuit breaker analysis, Circuit breaker testing, Decision making process, Maintenance activity, Testing industry, Circuit Breaker, DCM, DRM, Dual ground, Vibration
Pre-2014 Departments: School of Engineering > Department of Electrical, Electronic and Computer Engineering
Last Modified: 14 Oct 2016 09:32

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