Patent ID: 11953553
Assignee: LS ELECTRIC CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 3:
4. A correction method of a contact monitoring device for a vacuum circuit breaker, wherein the device monitors a contact state using a voltage output value output from a photosensor, module to determine when to repair or replace the vacuum circuit breaker, wherein the method comprises:
a step S200 of determining whether the contact state of the vacuum circuit breaker has changed;
when the contact state of the vacuum circuit breaker has changed in the S200 step, a step S300 of determining whether the vacuum circuit breaker has changed to a contact inserted state;
when the vacuum circuit breaker has changed to the contact inserted state in the S300 step, a step S400 of determining a position of a push rod assembly of the vacuum circuit breaker based on a voltage output value output from the photosensor module;
when the position of the push rod assembly is determined in the S400 step, a step S500 of determining, based on a contact wear amount determination reference, whether the contact state is normal in the contact insertion, and whether a contact wear amount is smaller than or equal to a set value; and
a step S600 of storing the determination result of the S500 step;
when the contact state of the vacuum circuit breaker is not changed in the S200 step, a step S210 of determining whether a current time has reached the preset period;
when the current time has reached the preset period in the S210 step, a step S310 of determining whether the vacuum circuit breaker is in a contact open state;
when the vacuum circuit breaker is in the contact open state in the S310 step, a step 330 of measuring an open position of the push rod assembly of the vacuum circuit breaker based on the voltage output value output from the photosensor module;
when the vacuum circuit breaker is not in the contact open state in the S310 step, a step S350 of measuring a closed position of the push rod assembly of the vacuum circuit breaker based on the voltage output value output from the photosensor module;
a step S370 of determining whether the contact wear amount determination reference correction of the photosensor module is required based on the open or closed position of the push rod assembly measured in the S330 or the S350 step, and correcting the contact wear amount determination reference; and
replacing or repairing the vacuum circuit breaker.