FIELD: electricity.
SUBSTANCE: from the moment of short circuit current surge on buses of the substation they start counting time equal to the time of delay of actuation of the input bus circuit breaker protection, and they monitor the moment of short circuit current disconnection, and if at the moment of time count completion the short circuit current disappears, a conclusion is made on disconnection of the input bus circuit breaker, from the moment of short circuit current disconnection they continue time count to the moment of completion of the time of delay of actuation of the transformer circuit breaker protection, at the same time they monitor the time of voltage disappearance from the side of the secondary winding of the transformer, and if it disappears at the moment of completion of the time of delay of actuation of the input transformer circuit breaker protection, a conclusion is made on false disconnection of the input transformer circuit breaker in the substation. The proposed method makes it possible to produce information on disconnection of the input circuit breaker of buses and false disconnection of the input circuit breaker of the substation transformer.
EFFECT: expansion of functional capabilities by production of information on disconnection of an input bus circuit breaker and false disconnection of an input substation transformer circuit breaker.
2 dwg
