This product is suitable for used in single-phase or 3-phase cable system under 12KV.specially in branch underground cable system.It has many advantages, such as simple and flexible combination mode,full insulation and seal,corrosion resistance,no maintenance and reliable operation. Moreover,it can displays the position of short circuit fault and shortens time to find fault,if mounts a short-circuit fault indicator on the cable junction,which belongs to main cable network or its branch.Therefore,the product widely applies to com -mercial centers,industrial zones and midtown.