FIELD: electrical equipment.
SUBSTANCE: field of application: electrical equipment. Device includes in two phases one current transformer with two secondary windings, ends of the first secondary windings of current transformers are connected to the first incomplete star, and current circuits of measuring instruments are connected to the beginning of the first secondary windings, the outputs of which are also connected to a partial star connected to the first incomplete star by the first return wire, and ends of second secondary windings of current transformers are connected to second partial star, and current circuits of relay protection devices are connected to the beginning of the second secondary windings, the outputs of which are also connected to a partial star connected to the second incomplete star by the second return wire. First return wire cut-in includes first winding of two-winding reacting element, and the second return wire cut-in includes the second winding of the two-winding reacting element connected in reverse to the first winding, besides, the output of the two-winding reacting element is connected to the actuator through time holding.
EFFECT: monitoring of integrity of secondary circuits of current transformers with two secondary windings.
1 cl, 4 dwg
