FIELD: electricity.
SUBSTANCE: from the moment of appearance of the short circuit current (SC) in the line of the main source of power supply they start counting time equal to the time of disconnection of a sectional circuit breaker (SCB) of buses, at the same time they determine the type of short circuit they monitor the moment of disappearance of SC current, and if two linear voltages disappear at the moment of SC current appearance, linear voltage and SC current disappear at the moment of completion of the time count, the conclusion is made on the failure of HCB and disconnection of the SCB under the double-phase SC, and if at the moment of time of time count completion all linear voltages and SC current disappear, they make a conclusion on the failure of HCB disconnection and SCB disconnection under the three-phase SC. Therefore it is possible to produce information on the failure of disconnection of the head circuit breaker and disconnection of the sectional circuit breaker during disconnection of the circular network in the mode of substation redundancy with determination of the SC type.
EFFECT: expansion of functional capabilities by means of information production on failure of disconnection of a head circuit breaker and disconnection of sectional circuit breakers during operation of a circular network in the mode of substation redundancy with determination of the type of a short circuit.
2 dwg
