OVERCURRENT PROTECTION DEVICE Russian patent published in 2022 - IPC H02H3/08 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering. The device contains an inductance coil connected to a voltage amplifier, which is connected to the winding of the time relay. The positive potential of the DC source is supplied through a contact with a time delay to close the time relay to the first output of the winding of the intermediate relay. The contact for closing the intermediate relay through the first output of the indicating relay is connected to the first output of the winding of the trip coil of the electrical installation switch. The second output of the winding of the intermediate relay and the trip coil is connected to the negative pole of the DC source.

EFFECT: simplification of technical implementation while ensuring reliable current protection of electrical installations.

1 cl, 1 dwg