| 摘要 |
PROBLEM TO BE SOLVED: To provide a ground fault detection system capable of concurrently performing detection of a ground fault of an ungrounded circuit and detection of a supply voltage of the ungrounded circuit owing to the circuitry that can be downsized, and of detecting the ground fault irrespective of a ground fault potential.SOLUTION: A ground fault detection system 10 includes: a ground fault detection unit 64 that detects a ground fault of an ungrounded circuit 70 on the basis of a ground fault detection signal St_s of a ground fault signal detection circuit 53 when a detection signal S_sig is placed on each of a positive output part PL and negative output part ML by an inverting amplifier 25, which is connected to the positive output part PL via a first relay circuit 21, and an inverting amplifier 35 connected to the negative output part ML via a second relay circuit 31; and a supply voltage detection unit 66 that detects an output voltage of a lithium ion battery 71 on the basis of a first supply voltage detection signal Vd1_s of a first supply voltage detection circuit 52. |
