Rating of cables in unfilled surface troughs

Pilgrim, James, Lewin, Paul, Larsen, Steffen, Waite, Francis and Payne, David (2012) Rating of cables in unfilled surface troughs IEEE Transactions on Power Delivery, 27, (2), pp. 993-1001. (doi:10.1109/TPWRD.2012.2186593).


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Cable circuits installed in unfilled troughs must often support high current ratings. To achieve higher ratings in unfilled troughs in the U.K., trough lids can be replaced by ventilated grilles, provided that the trough is within a substation site. While several methods exist for rating the traditional covered trough design, no standard method exists for naturally ventilated installations. To examine the possible uprating available, a coupled numerical model has been created for cable trough installations. Following successful benchmarking tests where the covered trough was modelled, the method has been extended to troughs with full natural ventilation. The results have been compared to commonly used engineering assumptions in order to validate simpler analytical methods. It was found that by allowing full natural ventilation of existing covered troughs, the continuous rating could be increased by as much as 28%

Item Type: Article
Digital Object Identifier (DOI): doi:10.1109/TPWRD.2012.2186593
ISSNs: 0885-8977 (print)
Keywords: power cable thermal factors, power transmission
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Organisations: EEE
ePrint ID: 336805
Date :
Date Event
April 2012Published
Date Deposited: 05 Apr 2012 09:07
Last Modified: 17 Apr 2017 17:20
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/336805

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