Relay fault detection circuit and detection method thereof
A relay fault detection circuit technology, applied in the direction of circuit breaker testing, etc., can solve the problems of time and cost increase, false alarm, danger, etc., and achieve the effect of reducing requirements
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 The advantages of the present invention are further described below in conjunction with the drawings and specific embodiments.
 Refer to figure 2 , Is the circuit diagram of the relay fault detection circuit in the present invention. The relay fault detection circuit includes a power supply that provides electrical energy, a load connected to both ends of the power supply, a main positive relay Kmp and a main negative relay Kmn that control the power supply of the engine in a DC high-voltage or low-voltage electrical network, and a protection control device for suppressing inrush current Pre-charge relay Kp. The main positive relay Kmp and the pre-charge relay Kp are connected in series between the power supply and the load, and the main negative relay Kmn is connected in series between the power supply and the load. In order to detect the relay failure, the circuit also includes a sampling circuit module to detect the voltage or current of the sampling point in ...
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