The principle of balanced transformer and ground fault circuit interrupter the breaker is a circuit breaker when the leak (s), starting from when the power supply ac 220v to breaker on power through a balanced coil
use the principles of Balanced transformer and Ground fault circuit interrupter Breaker is using the cut-out when leak (vacuum) by starting from when power is applied to the AC 220 V Breaker when the current through the coil Balanced