FIELD: electrical engineering. SUBSTANCE: device has series-connected resistive current sensor, switching member, and load, all connected between plus and minus of supply mains, as well as switching member control circuit; in addition, it is provided with triggering circuit of one-shot multivibrator, adjustable voltage divider, voltage regulator, and one-shot multivibrator. Device is designed for operation in comprehensive range of load currents without changing parameters of protective gear and for setting overcurrent protective threshold within entire range. EFFECT: improved operating precision of protective gear due to high speed of response. 2 cl, 1 dwg
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