The IEEE has begun to create the first complete guide for gas-insulated transmission lines, which will help utilities satisfy increasing demand in developed areas. The new standard, IEEE P1677(TM), “Application and User Guide for Gas-Insulated Transmission Lines (GIL),” will cover the technical aspects of planning, permitting, designing, specifying, installing, commissioning, operating and maintaining gas-insulated AC lines having maximum operating voltages of 72.5 kV or more.

Gas-insulated transmission lines can carry more current than overhead lines and are increasingly seen as options for fast-growing, congested areas where space is at a premium. These transmission lines use sulfur hexafluoride as the insulating gas and are typically placed underground or in surface passageways.

The guide will be written for power engineers having limited experience with gas-insulated lines. It is intended to serve a wide range of interests, including electric utilities, power system operators, power consumers and local governments.

IEEE P1677 is sponsored by the IEEE Power Engineering Society.