Current transformer and current sensor thereof

The utility model relates to a current transformer and current sensor thereof, current sensor includes the coil base member that comprises skeleton and the wire of winding on the skeleton, the cladding is enclosed the insulating layer and the package of matrix surface on line and is located insulating layer outlying iron shielded layer, the last one side in the center near the coil base member of iron shielded layer is equipped with the annular notch with coil base member coaxial line, the magnetic field that annular notch supplied to produce on the partial conductor is passed through in order to get into the coil base member, the iron shielded layer cladding is on the surface of insulating layer, annular notch's the magnetic field that can make once the conductor produce that sets up is passed through in order to get into the coil base member, make the coil base member can respond to the magnetic field that produces on the partial conductor, and the electromagnetic interference of outside other equipment has