COMBINED RESIDUAL CURRENT DEVICE Russian patent published in 2019 - IPC H02H3/33 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, in particular to automatic devices for protection of people against electric shock and for disconnection of electric consumers in case of deviation of electric energy quality from normalized GOST 32144-2013 values. For this purpose, in residual current device, comprising leakage current sensor (1), peak rectifier-amplifier (2), inertial RC-circuit with time-setting resistor and capacitor (3), threshold element (4), actuating element (5), power supply (6), stabilitron (7), comparator (8), logical OR element (9), second time setting resistor (10), controlled divider (11) and resistor (12), additionally introduced are selective filters of fifth (13) and seventh (14) supply voltage harmonics and two windings (15) and (16) arranged on the leakage current sensor core.

EFFECT: technical result of invention consists in expansion of functional capabilities, namely in provision of automatic disconnection of consumers in case of unsinusoidality of supply voltage, which exceeds normalized GOST.

1 cl, 1 dwg