AMDB

Permanent magnet tripping device is the most important part in residual current circuit breaker and it is the determinant of its quality.with novel designed,perfect structure and rellble performance.it can endure reslstnce of 180mm/s not less than 30 minutes and still act correctly.the materials of its operating part are superior. Residual current operated pemanent mognet tripping device opertes without any uxillry source of supply to break a circuit automatically when an earth leakge fault between phse and earth is greater than or equal to a threshold of 10mA,300mA or500mA. It is the key part of Residual Current Device,All these outstanding characteristics and other strong point ensure RCD for high reliability.