By Topic

IEE Proceedings A - Physical Science, Measurement and Instrumentation, Management and Education - Reviews

Issue 7 • Date October 1986

Filter Results

Displaying Results 1 - 5 of 5
  • UHV air insulation: physical and engineering research

    Publication Year: 1986, Page(s):393 - 394
    IEEE is not the copyright holder of this material | PDF file iconPDF (214 KB)
    Freely Available from IEEE
  • Double impulse tests of long airgaps. Part 1: Engineering problems and physical processes: the basis of recent tests

    Publication Year: 1986, Page(s):395 - 409
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1668 KB)

    Collaborative tests have been performed using nonstandard impulses, and employing a wide range of diagnostic techniques. Part 1 of the paper describes the need for such tests, the experimental arrangement and the digital data techniques developed for the tests. Part 2 is an account of the decay of the leader channel in long airgaps and the recovery of dielectric strength. It was found that the lea... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Double impulse tests of long airgaps. Part 2: Leader decay and reactivation

    Publication Year: 1986, Page(s):410 - 437
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2451 KB)

    The behaviour of large air-insulated structures subjected to complex multiple-peak surge overvoltages is influenced by the presence of already established leader overvoltages in influenced by the presence of already established leader development in the space. The decay processes of a positive leader channel following current interruption appear not to have been studied in detail, and Part 2 provi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Double impulse tests of long airgaps. Part 3: Voltage front perturbation effects

    Publication Year: 1986, Page(s):438 - 468
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2674 KB)

    Withstand voltage ratings for air insulation are partly based on test data obtained with standard biexponential impulses. The importance of the time parameters of the test impulse, with the distinction between lightning (LI) and switching (SI) standard impulses, is well established. The paper (Part 3) describes tests on a 6 m rod-plane gap with stresses which depart substantially from the biexpone... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Double impulse tests of long airgaps. Part 4: Effects of pre-existing space charge on positive discharge development

    Publication Year: 1986, Page(s):469 - 483
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1553 KB)

    The paper describes one of the three major studies with double impulses performed during the fifth test period of the Les Renardiÿres Group. In the third experiment a negative impulse (Tcr=45 ¿s) was used to create an extensive space charge in a 6 m rod-rod gap. The voltage level selected was ~0.8U50¿. Thereafter the effect of this pre-existing space charge on the development of a subsequent po... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.