FIELD: electrical engineering. SUBSTANCE: protective gear has arrestor incorporating thermal protection, fuse, grounded line, switch. Thermal protection operation disconnects arrestor from line and grounded line is connected to it to create short circuit. Fuse operates and disconnects power consumer from power supply. Overcurrent protective gear may incorporate in addition undercurrent protective device having variable thermal coefficient resistors and variable resistors inserted between communication line and ground conductor. Protective gear is accommodated in plug. EFFECT: improved design. 14 cl, 15 dwg
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