DEVICE FOR DIFFERENTIAL-PHASE HIGH-FREQUENCY PROTECTION OF POWER TRANSMISSION LINE SECTION FROM SHORT CIRCUIT CURRENTS

1531430 Detecting faults on polyphase lines WESTINGHOUSE ELECTRIC CORP 31 Dec 1975 [7 Feb 1975] 53370/75 Heading H2K A three-phase protective system detects earth faults by monitoring a first signal representing the zero-sequence current at one end of a line and phase-to-phase faults by monitoring a...

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Bibliographic Details
Main Author KALYAN K.MUSTAFI,IN
Format Patent
LanguageEnglish
Published 15.08.1978
Subjects
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
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Summary:1531430 Detecting faults on polyphase lines WESTINGHOUSE ELECTRIC CORP 31 Dec 1975 [7 Feb 1975] 53370/75 Heading H2K A three-phase protective system detects earth faults by monitoring a first signal representing the zero-sequence current at one end of a line and phase-to-phase faults by monitoring a second signal representing the difference of any two of the phase currents, each signal being compared in phase with a corresponding signal from the other end of the line to determine whether the fault is internal or external to the line. The details of the monitoring and phase-comparing systems are as described in Specification 1,449,682.
Bibliography:Application Number: SU19762315101