| 摘要 |
PURPOSE:To provide a grounding protective device, of an inverter, which can prevent a fire due to leakage electricity. CONSTITUTION:The grounding protective device is provided with a separation means made of an electromagnetic actuator 47, with a second current detection means of a fuse 34, with a means which is constituted of a fusing detection contact 34a, of a fault detection circuit 38 and of a trip circuit 39 and which gives a separation instruction to the separation means, with a first current detection means constituted of current detectors 13, 14 and with a control means which is constituted of voltage detectors 7, 8, of a transformer 22, of a voltage- reference generator 23, of a low-voltage selection circuit 24, of an amplifier 25, of a multiplier 25 and of amplifiers 27, 28. |
