METHOD OF PROTECTION FROM BREAKS OF PHASE AND NEUTRAL WIRES OF FOUR-WIRE OVERHEAD LINE OF ELECTRIC MAINS VOLTAGE OF 380 V AND DEVICE THEREFOR

摘要

FIELD: electronic equipment.;SUBSTANCE: method comprises use for protection of three-phase line of electric energy meter installed at input of consumer, in addition it functions to detect breakages phase and neutral wires, formation in counter command disconnecting signal transmitted in transformer substation, supply overhead line. Command of disconnecting signal acts on release of automatic circuit breaker installed at beginning of overhead line, and provides switching off damaged line. Device for protection against breaks phase and neutral wires four-wire overhead line comprises a transformer substation, automatic circuit breaker, four-wire air line, a microprocessor electric energy counter, load measurement unit of phase voltages relative to zero wire, a unit for determination of phase and neutral wires, a unit for generating disconnecting signal transmission channel shutting down command signal and actuator.;EFFECT: higher reliability of electric circuits with voltage of 380 V and improved electrical safety.;8 cl, 5 dwg