Elevated temperature operation of XLPE distribution cable system

Author

Fletcher, R.G. ; Bradley, J.F. ; Orton, H.E.

Author_Institution

BC Hydro Res. & Dev., Surrey, BC, Canada

fYear

1988

fDate

12-16 Sep 1988

Firstpage

758

Abstract

The authors report on a continuing investigation to determine the maximum emergency and continuous ratings which cross-linked-polyethylene (XLPE)-insulated concentric neutral cables may sustain without impairing operating life. Detailed investigations include the measurement of temperatures at different parts of a cable during heavy current cycling and the resulting mechanical stresses and strains. The reasons for these mechanical forces are explained by considering the differential thermal expansion of the materials used in the cable. It is shown that thermally induced torques leading to mechanical failure may be influenced by neutral design. Core temperatures of 90° or 110°C appear to represent wise choices for operating temperatures

Keywords

cable insulation; cable testing; insulation testing; mechanical testing; organic insulating materials; polymers; power cables; 110 degC; 90 degC; XLPE distribution cable system; concentric neutral cables; continuous ratings; core temperature; cross-linked-polyethylene; differential thermal expansion; electrothermal tests; heavy current cycling; maximum emergency rating; mechanical failure; mechanical strains; mechanical stresses; operating life; temperature measurements; thermally induced torques; Current measurement; Mechanical cables; Mechanical variables measurement; Power cables; Strain measurement; Stress measurement; Temperature distribution; Temperature measurement; Thermal expansion; Thermal force;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials, 1988. Proceedings., Second International Conference on Properties and Applications of

Conference_Location

Beijing

Type

conf

DOI

10.1109/ICPADM.1988.38511

Filename

38511