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Effect of Humidity on the Breakdown of Air Gaps under Oscillatory Switching Impulse Voltages

Bharadwaj, Raj Mohan and Prabhakar, BR (1996) Effect of Humidity on the Breakdown of Air Gaps under Oscillatory Switching Impulse Voltages. In: Conference Record of the 1996 IEEE International Symposium on Electrical Insulation, 16-19 June, Montreal,Quebec,Canada, Vol.1, 320 -323.


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Experimental investigations were carried out to study the effect of humidity on the breakdown of rod-plane gaps subjected to both unidirectional and bi-directional oscillatory switching impulse voltages. The humidity ranged from $14.1 - 36 gm/m^3$ at a constant temperature of 40' C. The gap subjected to uni-directional 6.3, 10, lQ kHz and bi-directional 4.2, 10,20 kHz oscillatory switching impulse voltages. The gap distance was varied from 8 to 30 cm. The experiments were carried out in a controlled atmospheric room. The results indicate an increase in breakdown strength with increase in humidity. The results are of great relevance at atmospheric conditions existing in Tropical countries.

Item Type: Conference Paper
Publisher: IEEE
Additional Information: Copyright 1990 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre: Division of Electrical Sciences > High Voltage Engineering (merged with EE)
Date Deposited: 06 May 2006
Last Modified: 19 Sep 2010 04:26
URI: http://eprints.iisc.ac.in/id/eprint/6619

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