Take one -way ground connection directional protection's intelligence switch

The utility model relates to a intelligent?power distribution power grid technology field especially relates to a take one -way ground connection directional protection's intelligence switch, and it has mainly been solved can not prepare the problem reporting to the police, cut off the circuit when one -way earth fault takes place in the circuit among the prior art, including controlling means, zero sequence voltage mutual inductor, zero?sequence?current?transformer, intelligent circuit breaker, connecting cable, zero?sequence?current?transformer is connected with the three -phase inlet wire end of intelligent circuit breaker respectively, zero?sequence?current?transformer's the other end and three -phase circuit power are connected, zero sequence voltage mutual inductor 's one end is passed through the connecting cable and is connected with controlling means, controlling means passes through the connecting cable and is connected with the control cable terminal box of intelligent circuit breaker, zero sequenc