Investigation on the Potential Rise and Currents in Insulated Mast Scheme with Single Tower During Stroke Interception

Kumar, Udaya (2010) Investigation on the Potential Rise and Currents in Insulated Mast Scheme with Single Tower During Stroke Interception. In: Journal of Lightning Research, 1 . pp. 1-11.

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Abstract

The insulated mast scheme for the lightning protection system can be found in a few practical designs. Many advantages over conventional protection system are some times envisaged. However, the technical literature on the analysis of such schemes and further quantification of their protection efficacy is rather scarce. As a first step to address this problem, the present work is taken up and the potential rise at the top and ground end currents in insulating mast scheme with single tower is investigated for several tower heights and pertinent values of other parameters. The quantities that are investigated are the potential difference across the insulation and ground end currents for both tower and the ground wires. Quantifications are carried out for the relevant range of stroke current front times. The influence of number of ground wires, their earthing location and to a limited extent, the length of the insulating support have been ascertained. Some relevant discussion on insulation strength is made. These findings are quite novel and aid in quantification of the practical efficacy of the insulated mast scheme. The level of induction to the support tower and possible flashover to the same are not in favour of this scheme.

Item Type:	Journal Article
Publication:	Journal of Lightning Research
Publisher:	Bentham Open
Additional Information:	© BENTHAM OPEN
Keywords:	Lightning protection;insulated mast scheme;ground wires, surface breakdown strength;induced tower currents
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	23 Aug 2011 12:12
Last Modified:	23 Aug 2011 12:12
URI:	http://eprints.iisc.ac.in/id/eprint/40216

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