FIELD: electric power industry.
SUBSTANCE: invention is intended to protect the windings of a three-phase transformer from turn faults. The reacting element additionally contains three voltage relays, the winding of each of them is connected to the switching contacts of one of the phases of the voltage regulator of the transformer under load, and their series-connected normally closed contacts are connected to a circuit of a series-connected measuring transducer and a current relay. The technical result is prevention of false operation of the device for protecting a three-phase transformer from turn faults.
EFFECT: technical and economic efficiency of the proposed three-phase transformer protection device lies in reduction of downtime, and therefore the damage caused by its false operation.
1 cl, 1 dwg
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