Bolted connectors for high voltage accessories installed on underground transmission lines

Splicing conductors in high-voltage underground power cables requires special skills and tools. For instance, techniques in use today include soldering, welding and compressing. A new generation of connectors was designed and developed incorporating shear-bolts to simplify installation. The application of the connectors is independent of conductor design, construction and material, and can be used on solid or stranded conductors. The authors describe the design with respect to the different requirements, developmental steps and final qualification process incorporating various international standards. These standards focus on product performance verification and operational limits.