FIELD: electrical equipment for apartment circuits. SUBSTANCE: device has contactors 1,2 with latching mechanisms, auxiliary relays 3,4 connected so that any change in apartment power circuit parameters is effected by single depression of push-button switch 6; pilot lamps 7-9 are provided for checking if desired parameters are chosen; control switch 6 serves to select desired parameter. EFFECT: improved fire safety, maintenance of desired parameters in case of failure or interruption of power supply. 1 dwg
