FIELD: electrical engineering.
SUBSTANCE: the device has a power switch, zero sequence current cable transformers according to number N of cables in a loom, reacting member, the first time-delay member, the first signaling element, the first output member, power unit, collecting bars, N current members, OR gate, NAND gate, memory unit, the second time-delay member, the second signaling member and the second output member are additionally introduced.
EFFECT: enhanced quality efficiency of functioning.
9 dwg
