The influence of SF6 and SF6/N2 gas pressure to the breakdown performance of polyester film
Conference
·
OSTI ID:529588
- Harbin Univ. of Science and Technology (China). Dept. of Electrical Material
- Shenyang Research Inst. of Transformer (China)
SF6 has been widely used as the gas insulating medium in gas insulated transformer, and polyester film used as the turn insulation and other insulating materials. In this paper, the insulation strength of turn insulation of SF6/N2-film is tested when the SF6 is replaced by SF6/N2 mixed gas, and also compared with that of SF6-film. The results show that the power frequency breakdown voltage and breakdown stress of SF6/N2-film is lower than that of SF6-film in the same pressure and the same film thickness, the mean value of the former is about 91% of the latter. In order to reach the same level of turn insulation strength in the operation range, the gas pressure must be increased by 0.05 Mpa.
- OSTI ID:
- 529588
- Report Number(s):
- CONF-960614--; ISBN 0-7803-3531-7
- Country of Publication:
- United States
- Language:
- English
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