Open -type zero sequence current transformer

The utility model provides an open -type zero sequence current transformer, includes a semi -ring shape insulating housing and the 2nd semi -ring shape insulating housing. Be equipped with a semi -ring shape iron core in the semi -ring shape insulating housing. A semi -ring shape iron core has first coil outward, and first coil has first external insulation layer outward. The 2nd semi -ring shape insulating housing one side structure is the same, and a semi -ring shape iron core up end has a magnetically permeable layer, and the terminal surface has the 2nd magnetically permeable layer under the semi -ring shape iron core. The 2nd semi -ring shape iron core up end has the 3rd magnetically permeable layer, and the terminal surface has fourth magnetically permeable layer under the 2nd semi -ring shape iron core. A semi -ring shape insulating housing and the 2nd semi -ring shape insulating housing make -up get up to form ring shape, have the strap at the surface hoop, and it is fixed that the screw bolt and nut