A residual current device (RCD), residual current circuit breaker (RCCB), or earth leakage circuit breaker (ELCB), is a safe life-saving device that is designed to prevent humans from getting an ongoing fatal electric shock if you touch something live, such as a bare wire.

Tongou always adheres to the principle of “quality first”, adheres to management informatization, and production automation continuously improves production process quality and production management level.