Tel: +86757-23620900
Mob: +8613823473700
Home > News > Content
Leakage Protection Plug Works
- Jan 18, 2018 -

The working principle is to plug the two power lines(FireWire and center line) at the same time into a special"zero-sequence current transformer" hole,when the electrical appliances normal use,the live wire and the middle of the current is exactly the same,the current one by one,the current transformer secondary coil voltage output.When there is "residual current" in the "ground loop"(including the earth loop),the two power lines penetrating the transformer are not balanced in current,and a voltage signal proportional to the current is generated at the output of the "current transformer".As long as the voltage signal is large enough,the voltage signal is amplified by the integrated circuit of the dedicated circuit board and the like,and then the thyristor on the trigger board is changed from the turn-off to the turn-on so as to energize the loop tripping coil in series.The main circuit trip device is disconnected,protecting person safety that may come into contact with the power supply.     Leakage protection plug when the plug is connected to the electrical appliance,if there is leakage,the leakage current has not reached the amount of harm to the human body before the power cut off automatically,to protect personal safety.