FIELD: electrical engineering. SUBSTANCE: device is designed for emergency power supply systems. It includes unit for detection of immediate necessity of operation based on flip-flop/arbiter connected to outputs of inhibition unit and time delay element. First output of unit for detection of immediate necessity of operation is linked to input of second actuating unit and second output - to input of control, unit of automatic reclosure which improved selectivity at high speed of response of device. EFFECT: improved selectivity at high speed of response of device. 1 dwg
