Self-diagnostic apparatus and method for electric device

摘要

A diagnostic method and apparatus for self-diagnosis a load side of an electric device to detect the occurrence of the abnormal electricity usage at the load using a simple apparatus based on a current sensor includes checking rated power consumption of a load, measuring power consumption of the load in operation, calculating a change in the power consumption by comparing the rated power consumption of the load with the power consumption of the load in operation, and determining that an abnormal power consumption occurs at the load when the change in the power consumption is outside a predetermined range.

主权项

1. A method of diagnosing electric device, the method comprising:
checking a rated power consumption of at least two operated loads by searching a lookup table; supplying power to each of the at least two operated loads individually by operating at least one switch, which is controlled by a processor, to route the power to each of the at least two operated loads individually; measuring a power consumption of each of the at least two operated loads when the power is supplied to each of the at least two operated loads individually, wherein the measuring of the power consumption of each of the at least two operated loads includes measuring a current value of the power supplied to each of the at least two operated loads individually using a current detector; calculating, using the processor, a change in the power consumption by comparing the checked rated power consumption of each of the at least two operated loads with the measured power consumption of the at least two operated loads; and determining, using the processor, that an abnormal power consumption occurs in one or more of the at least two operated loads based on the calculated change in the power consumption being outside a predetermined range in the one or more of the at least two operated loads.