Dielectric Characteristics of Gas Insulated Bushings in Air Under Dry and Wet Conditions

Yamagiwa, T.; Kamata, Y.; Yoshioka, Yoshio; Hosokawa, Masao

doi:10.1109/tpas.1981.316387

Cited by 12 publications

(1 citation statement)

References 2 publications

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“…So far, many papers have been published on the oil, gas and resign insulated bushing and insulation [1][2][3]. However, there has not been satisfactorily progress in the research and development of HTS HV bushing.…”

Section: Introductionmentioning

confidence: 99%

Electrical characteristics of insulating materials for HTS bushing immersed in <TEX>$LN_2$</TEX>

Choi¹,

Kim²,

Shin³

et al. 2011

Progress in Superconductivity and Cryogenics

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Abstract--For the operation of high temperature superconducting (HTS) power equipments, it is necessary to develop insulating materials and high voltage (HV) insulation technology at cryogenic temperature of bushing. In this paper, the surface flashover characteristics of various insulating materials in LN 2 are studied. These results are studied at both AC and impulse voltage under a non-uniform field. The negative impulse breakdown voltage of GFRP is slightly higher than the positive impulse breakdown voltage. The use of glass fiber reinforced plastic (GFRP) and polytetrafluoroethylene (PTFE, Teflon) as insulation body for HTS bushing should be much desirable. Especially, GFRP is excellent material not only surface flashover characteristics but also mechanical characteristics at cryogenic temperature. The surface flashover is most serious problem for the shed design in LN 2 and operation of superconducting equipment.

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Section: Introductionmentioning

confidence: 99%