FIELD: home appliances. SUBSTANCE: device has rectifying bridge 1, actuating member 6, threshold gate 7, two voltage stabilizers 4 and 8, mains voltage divider 2, unit for mains voltage monitoring 3, pulse generator 5, pulse counter 9, indication unit 11, control unit 10. EFFECT: instantaneous circuit breaking when voltage exceeds range of 170-250 V and five minute delay for turning user device on when mains voltage returns into this range, increased load of device. 3 cl, 2 dwg
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