METHOD FOR DETERMINING THE MOMENT OF CLOSURE OF A CIRCUIT BREAKER ON A HIGH VOLTAGE LINE

摘要

The invention relates to a method for determining the moment of closure of a circuit breaker in a three-phase high-voltage electric network after contact (7A, 8A, 7B, 8B, 7C, 8C) separation in the presence of an error in one of the three phases A, B or C. Determination of the moment of closure comprises the following stages: measurement of voltages ULA0, ULB0 and Ulc0, measurement of voltage USA0, determination of voltage US A0, US B0 and US c0, calculation of the differences ULAB, ULAC and ULBC, calculation of the differences USAB, USAC and USBC, determination of the moment of closure on the basis of the voltage differences.