Patent ID: 9182446
Filing Date: 2015-11-10
Classification: G01R

Abstract:
1. A relay detection apparatus operated in a single-phase AC power source, comprising: first relay, the first relay comprising: an input contact; an output normally-open contact; and an output normally-close contact, wherein the output normally-open contact forms a normally-open path with the input contact, and the output normally-close contact forms a normally-close contact with the input contact; a voltage detection module, comprising: a voltage comparison unit configured to receive the first output voltage and the second output voltage and compare the first output voltage and the second output voltage so that normal and abnormal contact statuses of the input contact, the output normally-open contact, and the output normally-close contact of the first relay are detected out; wherein the first relay is connected to a line path of the single-phase AC power source; the first voltage detection unit of the voltage detection module is configured to receive the voltage at the input contact of the relay to be a first input detection voltage and receive a voltage of a ground path of the single-phase AC power source to be a second input detection voltage, and produce the first output voltage; the second voltage detection unit of the voltage detection module is configured to receive the voltage at the output normally-close contact of the relay to be a first output detection voltage and receive a voltage of the ground path of the single-phase AC power source to be a second output detection voltage, and produce the second output voltage.