A Novel Design for Medium Voltage (15-35kV) URD Cable Joints

A new concept in heat-shrinkable technology has been developed into a range of medium voltage URD cable joints. The new thermo-elastomeric tubing has been used in a range of cable joints for concentric and jacketed concentric neutral distribution cables for 15 to 35kV voltage classes. These joints were designed with the aid of a computer modeling and finite element analysis technique which predicted the electrical stress and assisted in design optimization. The joints were tested to IEEE 404-1986 and ANSI C119.1-1974. The typical stress plots of the joints and those data relevent to performance are also reported.