The Development of A Fully Synthetic Tape Insulation For Lapped Power Cables

The characteristics of the traditional kraft paper/oil insulation of power transmission cables are the limiting factors of cable performance in some applications. An insulating tape of an oriented polyolefin has been developed to overcome these limitations by improving the operating stress, heat transfer, charging current and SIC of a cable. Results are presented of tests on new materials and small cable samples. The test data are extrapolated to cable designs for 345 and 550 kV.