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Rating methods for cables installed in unventilated and partially ventilated surface troughs

Rating methods for cables installed in unventilated and partially ventilated surface troughs
Rating methods for cables installed in unventilated and partially ventilated surface troughs
Cables installed in surface troughs are a critical part of many transmission circuits. This paper presents a method for calculating the rating of such circuits using computational fluid dynamics techniques, applied to two common trough designs. One design has solid concrete lids while for the second some lids are replaced by grilles to encourage natural air circulation. For the case of covered troughs with solid concrete lids, the IEC 60287 method was found to be conservative owing to its failure to consider the thermal impact of the ground. Good agreement was observed between the CFD model and an improved analytical formulation by Anders. Modeling of partially ventilated troughs, which at present cannot be rated analytically, shows continuous rating increases of up to 31% over the covered design owing to greater air circulation.
978-1-4577-0276-1
74-78
Pilgrim, J.A.
4b4f7933-1cd8-474f-bf69-39cefc376ab7
Swaffield, D.J.
a49c59cd-9f76-456a-a948-a479b9a1c154
Lewin, P.L.
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Payne, D.
9a783127-bf02-4dfd-9a73-501a091a80df
Pilgrim, J.A.
4b4f7933-1cd8-474f-bf69-39cefc376ab7
Swaffield, D.J.
a49c59cd-9f76-456a-a948-a479b9a1c154
Lewin, P.L.
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Payne, D.
9a783127-bf02-4dfd-9a73-501a091a80df

Pilgrim, J.A., Swaffield, D.J., Lewin, P.L. and Payne, D. (2011) Rating methods for cables installed in unventilated and partially ventilated surface troughs. IEEE 2011 Electrical Insulation Conference, Annapolis, Maryland, United States. 04 - 07 Jun 2011. pp. 74-78 .

Record type: Conference or Workshop Item (Paper)

Abstract

Cables installed in surface troughs are a critical part of many transmission circuits. This paper presents a method for calculating the rating of such circuits using computational fluid dynamics techniques, applied to two common trough designs. One design has solid concrete lids while for the second some lids are replaced by grilles to encourage natural air circulation. For the case of covered troughs with solid concrete lids, the IEC 60287 method was found to be conservative owing to its failure to consider the thermal impact of the ground. Good agreement was observed between the CFD model and an improved analytical formulation by Anders. Modeling of partially ventilated troughs, which at present cannot be rated analytically, shows continuous rating increases of up to 31% over the covered design owing to greater air circulation.

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More information

Published date: 5 June 2011
Additional Information: Event Dates: 5 - 8 June 2011
Venue - Dates: IEEE 2011 Electrical Insulation Conference, Annapolis, Maryland, United States, 2011-06-04 - 2011-06-07
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 272416
URI: http://eprints.soton.ac.uk/id/eprint/272416
ISBN: 978-1-4577-0276-1
PURE UUID: 01af6729-25f3-45f3-b2a6-9735515b0d2c
ORCID for J.A. Pilgrim: ORCID iD orcid.org/0000-0002-2444-2116

Catalogue record

Date deposited: 06 Jun 2011 14:37
Last modified: 21 Nov 2021 02:57

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Contributors

Author: J.A. Pilgrim ORCID iD
Author: D.J. Swaffield
Author: P.L. Lewin
Author: D. Payne

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