Electrical endurance and reliability of circuit-breakers-common experience and practice of two utilities

Tests carried out for HV and MV equipment are described. They have been designed to represent an equivalent stress level designed to represent an equivalent stress level borne over 25 years in a modern system and provide a good compromise between cost and representativeness. Twenty years of experience shows that the tests make it possible to satisfactorily check aspects of dimensioning relevant to reliability and to give the operator a quantified guarantee.<
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