Impulse voltage breakdown of argon+SF6 mixtures under non-uniform electric fields

Document Type

Conference Proceeding

Publication Date


Publication Title

IEEE Xplore

Conference Name

2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena


This experimental study addresses the behavior of binary mixtures of argon and sulfur hexafluoride in a rod-plane electrode configuration when subjected to impulse voltages. Positive-polarity, standard lightning impulse voltages (1.2-/spl mu/s/50-/spl mu/s) with different magnitudes were employed throughout the experiments. The percentage of SF/sub 6/ in Ar was varied from 1% to 90% at a total gas pressure of 50 kPa and 100 kPa. The breakdown voltage of each gas mixture was recorded at 50% breakdown probability. Similar to our theoretical as well as experimental studies under static electric fields it is observed that the breakdown strength of Ar has increased dramatically when mixed with a small percentage of SF/sub 6/. However, the breakdown voltages did increase monotonically but not dramatically for higher SF/sub 6/ percentages.


Albuquerque, NM, USA

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© Copyright 2003 IEEE