Patent ID: 9025290
Filing Date: 2015-05-05
Classification: H02H

Abstract:
1. A protective circuit electronically connected between a power supply and a load, the protective circuit comprising: a first jack electronically connected to the power supply, and comprising a grounding wire and a live wire; a second jack electronically connected to the load, and comprising a grounding wire and a live wire, the grounding wire of the second jack electronically connected to the grounding wire of the first jack; a first control unit comprising a first relay, the first relay electronically connected to the live wire of the first jack and the live wire of the second jack; a detecting circuit detecting whether the grounding wire of the first jack is grounded, and outputting indication signals according to detection; and a logic control circuit electronically connected between the detecting circuit and the first control unit; the logic control circuit outputting a control signal to the first control unit according to the indication signals to turn on/off the first relay, for allowing the live wire of the first jack to be connected to/disconnected from the live wire of the second jack.