FIELD: electrical engineering.
SUBSTANCE: protective shutdown device comprises a leakage current sensor (1), peak rectifier-amplifier (2), resistor (3) and actuating element (7), mechanically connected to RCD (8) contact system, additionally there is synchronization unit (4), pulse counter (5), a digital comparing device (6) and setting unit (14), and the output winding of the leakage current sensor is made two-section, wherein the winding sections have the same number of turns and are connected in series-opposite way.
EFFECT: high noise-immunity to influence of higher harmonics of mains voltage at actuation thresholds by current values of leakage current and mains voltage.
1 cl, 2 dwg
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