TY JOUR TI THE IMPROVEMENT OF PROTECTING CUTOUT IN POWER SUPPLY SYSTEMS UP TO 1000 V KW device of power supply protecting cutout system KW zero working and protective conductors JO Bulletin of KSAU AU Nikolskiy, O.K. AU Cherkasova, N.I. AU Yeremina, T.V. PY 2013 IS PB Krasnoyarsk State Agrarian University