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With the increase of application of electric and electronic devices in space and nuclear power stations, the polymer insulating materials are inevitably exposed to various kinds of environments. As technology advances, increasing demands on the reliable operation under various operating and environmental conditions are made on materials and components. Therefore, it is important to investigate the...
This paper describes the effect of magnetic field on tracking failure of gamma-ray irradiated polybutylene naphthalate (PBN), polybutylene terephthalate (PBT) and polyethylene terephthalate (PET). The experiment was carried out by applying a dc pulse voltage under magnetic field. The magnetic flux density (MFD) of the magnetic filed was 495 mT and the direction of E×B was 0, 90 and 270 degrees with...
The effect of gamma-ray irradiation on dielectric breakdown of polyphenylene oxide under magnetic field was investigated. The experiment was carried out by applying a dc pulse voltage under magnetic field. The magnetic flux density (MFD) of the magnetic filed was 495 mT. The samples were irradiated in air up to 100 kGy and then up to 1000 kGy with a dose rate of 10 kGy/h by using a 60Co gamma-source...
This paper presents initial partial discharge results for a simple cone-plane gap geometry under applied high voltage when a DC magnetic field is present. Initial phase resolved Phi-q-n results show that the influence of a DC magnetic field as low as 70 mT appears to alter the distribution of the Phi-q-n patterns. This result is important in order to understand the physical PD degradation processes...
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