Sökning: "Heike Ullrich"

Hittade 2 avhandlingar innehållade orden Heike Ullrich.

  1. 1. Ageing and characterisation of semiconducting glazes

    Författare :Heike Ullrich; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; outdoor insulation; HV-DC AC system; field monitoring; semiconducting surface insulator; ageing; laboratory testing;

    Sammanfattning : .... LÄS MER

  2. 2. Aging and Characterization of Semiconducting Glazes

    Författare :Heike Ullrich; Chalmers University of Technology; []
    Nyckelord :;

    Sammanfattning : Semiconducting glazes on ceramic insulators had been introduced as a solution for improving the performance of high voltage insulators especially under heavily polluted conditions. The major concern in using such glazes, despite their approved advantages, is the observed aging of the surface with exposure time, leading to reduction of conductivity and deterioration of the glaze itself, especially under dc voltage. LÄS MER