CURRENT 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 inductor with two paired outputs connected to the first and second voltage amplifiers, which amplify the voltage value to the desired value. The first amplifier is connected to the winding of the time relay. The positive potential from the direct current source is supplied through a contact with a time delay to close the time relay to the first output of the winding of the first intermediate relay and through the contact to close the first intermediate relay to the first output of the first indicating relay, and from it to the first output of the winding of the trip coil of the electrical installation switch. The second voltage amplifier is connected to the winding of the second intermediate relay. The positive potential from the DC source is supplied through the contact to close the second intermediate relay to the first output of the second indicating relay, and from it to the first output of the winding of the trip coil of the electrical installation switch. The second output of the winding of the first intermediate relay and the trip coil is connected to the "minus" pole of the DC source.

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

1 cl, 1 dwg