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AC breakdown strength of N2, SF6 and a mixture of N2+SF6 containing a small amount of SF6

Conference ·
OSTI ID:529630
;  [1]; ;  [2]
  1. Istanbul Technical Univ. (Turkey). Electric-Electronics Faculty
  2. Schneider Electric Co., Istanbul (Turkey)
AC breakdown strengths of N{sub 2}, SF{sub 6} and a mixture of N{sub 2}+SF{sub 6} containing 1% of SF{sub 6} were experimentally studied. For this purpose, 50 Hz AC breakdown voltages in both uniform and non-uniform fields up to a pressure of 400 kPa from 50 kPa were measured. Test results show that the addition of 1% of SF{sub 6} to nitrogen increases the breakdown voltage up to 250 kPa in a non-uniform field. The relative breakdown strength of the mixture with respect to components was also calculated in 50 Hz AC voltage. The analysis of Paschen curves reveals an improvement of 40% in the breakdown strength of mixture in uniform field but in non-uniform fields, the maximum AC breakdown voltage of the mixture is 24% lower than that of pure SF{sub 6}.
OSTI ID:
529630
Report Number(s):
CONF-960614--; ISBN 0-7803-3531-7
Country of Publication:
United States
Language:
English