ELECTRICAL STRESS CONCENTRATION AT THE TERMINALS OF M.V. & H.V. XLPE CABLES

Abstract

AbstractLongitudinal and radial stresses in a M.V. and H.V. cables through terminalsare computed using Schwarz Christoffel transformation for field sketching.The terminals and associated cable are rated at 11KV, 33KV and 132KV a.cinsulated by cross–linked polyethylene (XLPE). The electrical field sketching at thecable terminations is carried out theoretically and the results are confirmed byexperiments.It seems that the maximum stresses occurs in the cable insulation and themaximum longitudinal stresses along the screened outer surface of the cross-linkedpolyethylene (XLPE) insulation occurs between the cable and the termination center.The results show that the maximum longitudinal stress is many times theoncorrespding maximum radial values.Key Words: Stress distribution for XLPE cable, Termination of XLPE cables