Effects of voltage surges on extruded dielectric cable life project update

Author

Hartlein, Richard A. ; Harper, V.S. ; Ng, Harry

Author_Institution

Georgia Power Co., Atlanta, GA, USA

Volume

9

Issue

2

fYear

1994

fDate

4/1/1994 12:00:00 AM

Firstpage

611

Lastpage

619

Abstract

Electric utility engineers have commented that extruded distribution cables frequently fail during or shortly after a thunder storm. These engineers also comment that failures often reoccur on cable circuits where previous failures were located with a thumper. Linemen at Georgia Power often make similar comments. To investigate this observation, crosslinked (XLPE) and tree retardant crosslinked (TRXLPE) power cable designs were subjected to accelerated water treeing tests. Samples were subjected to simulated lightning surges or simulated thumping surges. Crosslinked cables removed after 15 years of service operation were also subjected to these surges. The results show that, in some cases, lightning surges do reduce extruded distribution cable life. Also, high level thumping surges appear to reduce cable life once cables are well aged

Keywords

ageing; cable insulation; cable testing; distribution networks; electric breakdown of solids; insulation testing; life testing; lightning; organic insulating materials; overvoltage; power cables; surges; XLPE; accelerated water treeing tests; electric breakdown; extruded cable insulation; life; lightning surges; power distribution; thumping surges; tree retardant crosslinked polyethylene; voltage surges; Circuit simulation; Dielectrics; Lightning; Power cables; Power engineering and energy; Power industry; Retardants; Storms; Surges; Voltage;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.296236

Filename

296236