Ambient Temperature Influence on Cable Trifurcating Joint Failures
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Paper number
1718
Working Group Number
Conference name
CIRED 2019
Conference date
3-6 June 2019
Conference location
Madrid, Spain
Peer-reviewed
Yes
Short title
Convener
Authors
Tee, ShengJi, SP Energy Networks, United Kingdom
Bebbington, Malcolm, SP Energy Networks, United Kingdom
Neilson, David, SP Energy Networks, United Kingdom
Bryans, Russell, SP Energy Networks, United Kingdom
Jones, Matthew, SP Energy Networks, United Kingdom
Fox, Jonathan, SP Energy Networks, United Kingdom
Bebbington, Malcolm, SP Energy Networks, United Kingdom
Neilson, David, SP Energy Networks, United Kingdom
Bryans, Russell, SP Energy Networks, United Kingdom
Jones, Matthew, SP Energy Networks, United Kingdom
Fox, Jonathan, SP Energy Networks, United Kingdom
Abstract
A significant volume of 33kV cable trifurcating joint failures has prompted investigations on failure cause. Through analysing historical failure records, the majority of the failures occurred in summer and in the evening/overnight/early morning. Failures appear to occur more frequently due to a combination of a higher absolute ambient temperature and a sustained period of large day/night temperature difference. These are prospective precursors to a relative saturation hysteresis phenomenon that lowers the dielectric strength of the oil-impregnated paper insulation in the joints, increasing the probability of dielectric failures.
Table of content
Keywords
Publisher
AIM
Date
2019-06-03
Published in
Permanent link to this record
https://cired-repository.org/handle/20.500.12455/533
http://dx.doi.org/10.34890/755
http://dx.doi.org/10.34890/755
ISSN
2032-9644
ISBN
978-2-9602415-0-1