Summary of CIGRE 13.06 Working Group world wide reliability data and maintenance cost data on high voltage circuit breakers above 63 kV

A summary is given of the most significant reliability data and maintenance cost data from the two CIGRE 13.06 Working Group world wide reliability surveys of the reliability of high voltage circuit breakers of 63 kV and above. The first enquiry covered the years 1974-77 and included all interrupting technologies. The second enquiry covered the years 1988-91 and only included single pressure SF/sub 6/ breakers. A description is given of the scope and objectives of the CIGRE 13.06 Working Group. A brief description is given of some of the highlights from their studies.<
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