Lightning and switching impulse breakdown of rod/plane gaps in nitrogen and nitrogen/Freon $(CCl_2F_2)$ mixtures

Rajendran, TVB and Lakshminarasimha, CS and Naidu, MS (1983) Lightning and switching impulse breakdown of rod/plane gaps in nitrogen and nitrogen/Freon $(CCl_2F_2)$ mixtures. In: IEE Proceedings, Part A: Physical Science, Measurement and Instrumentation, Management and Education, 130 (3). pp. 134-139.

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Abstract

Lightning pulse (1.5/50 \mus) and switching pulse (200/2000 \mus) breakdown phenomena in N and N/Freon mixture were investigated in rod/plane gaps at total pressures \leq5 bars and spacings \leq100 mm, with freon concentration of 1-20%. In general, substantial improvement in breakdown strength can be achieved, particularly for neg. polarities, with the addition of small percentages of $CCl_2F_2$ to $N$. The characteristic pressure effect in the pos.-point breakdown voltage vs. pressure curve obsd. in many strongly attaching gases is ill defined in these mixtures, and can be seen only over a limited range of experimental conditions. The corresponding effect for negative-point breakdown is observed in these mixture at 2-4 bars for long gaps (>40 mm). The breakdown voltages for a 100-mm gap with the switching pulse at pressures >2 bars are generally 20% lower than the corresponding lightning pulse data.

Item Type: Journal Article Copyright of this article belongs to IEE-Institute of Electrical Engineering Division of Electrical Sciences > High Voltage Engineering (merged with EE) 17 Apr 2008 27 Aug 2008 13:19 http://eprints.iisc.ernet.in/id/eprint/13697