rcbo works

Leakage circuit breaker according to the principle of current balance work, the line and neutral through a ring-shaped magnetic core, as a electric transformer primary line group, while the second line group trip device is connected. When the circuit is working properly, the phase and neutral line current is equal to the vector sum of currents is zero. However, if the circuit fails, the current ground, this line and neutral currents can not mcb circuit breakercurrent vector sum is not equal to zero. Electric energy meter secondary line group induces this case, through the electronic amplifier circuit amplified so that leakage circuit breaker tripped, cutting off access to the load circuit. When the residual current at the rated tripping current 50% to 100%, and leakage circuit breaker tripped.