FIELD: physics, measurement.
SUBSTANCE: invention is related to the field of metering equipment and may be used for provision of electric and fire safety in process of electric installations operation by means of reliable disconnection of loads in case of single-phase damages of insulation. Invention is based on technical problem of providing control of zero conductors integrity. Specified problem is solved by the fact that device for control of zero conductors integrity in lines of 0.38 kV that comprises three-phase power transformer connected by phase wires with single-phase and three-phase loads, dead-earthed neutral of transformer is connected to zero protective and zero working conductors additionally comprises, according to invention, single-phase double-winding transformer, primary winding of which is connected into inset of zero working conductor and is connected by means of resistor and button with phase wire, and secondary winding of transformer is connected serially to reacting element that influences the signal element, and is connected into inset of zero protective conductor, outlet of which is connected to grounding device.
EFFECT: provision of zero conductors integrity control.
1 dwg
