LEAKAGE-ELECTRICITY PROTECTION EQUIPMENT FOR INSULATING SYSTEM OF 380, 660V

The utility model relates to a creepage protection device for an insulating system of 380V or 660V, which comprises a voltage relay, an alternating current contactor, a breakage insurance device, an indicating lamp, an electric whistle and a distribution board (or oven, or showcase). The utility model is characterized in that three elements are connected in parallel between the neutral point of the low pressure side of a supply transformer 1 and the ground, namely the voltage relay 2, a route selecting earth resistor 3 and the breakage insurance device 4, and an electrified wire netting is connected with a special bypass earth creepage checking relay 5 and a line displaying indicating device 8. The device has the advantages that the utility model can ensure personal safety, can automatically select and display grounding fault circuit, can continuously provide electricity after fault occurs, etc. The utility model shows the developing direction of 380V and 660V low-voltage distribution devices.