Earthed neutral –TT
Note :
In Earthed Neutral (TT) System, the neutral from the main transformer is connected to the ground though an earth ground and all metallic parts of the equipment and loads are connected to another earth ground. In case of electric fault, a current linkage will be going through the earth wire to the transformer. A Residual current Breaker will detect this current and open the circuit (according to the rating).
