Method for determining the moment of closure of a circuit breaker on a high voltage line

A method for determining the reclose time of a circuit breaker on a three-phase high-voltage electric network after separation of contacts 7 A, 8 A, 7 B, 8 B, 7 C, 8 C in the presence of a fault on one of the three phases A, B or C includes measuring voltages ULA0, ULBO and ULCO, measuring voltage U...

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Bibliographic Details
Main Author DUPRAZ JEAN-PIERRE,SIGUERDIDJANE HOURIA,BOUDAOUD FARAH,BASTARD PATRICK
Format Patent
LanguageEnglish
Published 03.05.2006
Subjects
BASIC ELECTRIC ELEMENTS
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
EMERGENCY PROTECTIVE DEVICES
GENERATION
RELAYS
SELECTORS
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Summary:A method for determining the reclose time of a circuit breaker on a three-phase high-voltage electric network after separation of contacts 7 A, 8 A, 7 B, 8 B, 7 C, 8 C in the presence of a fault on one of the three phases A, B or C includes measuring voltages ULA0, ULBO and ULCO, measuring voltage USAO,determining the voltage USA0, USB0, and USCO, calculating the differences ULAB, ULAC and ULBC, calculating the differences USAB, USAC, and USBC. From these measurements and calculations, a determination of the reclose time is made on the basis of the voltage differences.
Bibliography:Application Number: CN200480008952