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

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering. The overcurrent protection 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 to the contact with a time delay to close the time relay. The device also contains an intermediate relay with two closing contacts, a signal lamp, a microcontroller with two closing contacts and two opening contacts. A positive potential from a DC source through the contact to close the relay and the contact to close the microcontroller is fed to the first output of the signal lamp. The positive potential from the DC source to the relay contact through the opening contact of the microcontroller is supplied to the first output of the indicator relay and then 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, signal lamp and 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, 2 dwg