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The article focuses on aging of 154 kilovolt (kV) underground power cable insulation under combined thermal and electrical stresses. Ribbons of silane-cured cross linked polyethylene (XLPE) 20 millimeters (mm) wide and 60 to 100 micrometer thick were cut from a commercially available 154 kV transmission cable. The XLPE ribbons were thermally aged at temperatures between 20 degree Celsius and 90 degree Celsius and electrically stressed at 50 kV/mm to 130 kV/mm. The aging tests were performed with the specimens placed between parallel-plane electrodes and immersed in mineral oil. The electrical aging supported a direct relationship between the square of the electrical field and log time. Chemical analysis showed that oxidation had occurred in the thermally aged specimens.

Presents an editorial on the importance of supporting and mentoring female engineers. [ABSTRACT FROM AUTHOR]

The author talks about the web site of the Dielectrics and Electrical Insulation Society (DIES) located at http://ewh.ieee.org/soc/deis. She plans to use the web site as an avenue to address the society's concerns, particularly membership growth. The author wants to reach students who work in the dielectrics and electrical insulation industry but are not yet members of the society.

We are pleased to announce that the August 2017 issue of the IEEE Transactions on Dielectrics and Electrical Insulation (TDEI) will be a special issue on Power Modulators, Repetitive Pulsed Power and High Voltage topics. [ABSTRACT FROM PUBLISHER]