Title :
TSC and DSC measurements of polymeric insulators used in medium voltage distribution cables
Author :
De Andrade, Adnei M. ; Faria, Roberto M. ; Fonseca, Fernando J. ; Dirani, E.A.T. ; Pinheiro, Walter ; Oliveira, J.J.S.
Author_Institution :
Inst. de Electrotecnica e Energia, Sao Paulo Univ., Brazil
Abstract :
This article describes results of thermally stimulated current (TSC) measurements of XLPE, HDPE and PVC samples, which are used as insulating materials in medium voltage cables used in electrical energy distribution. Systematic investigations have been made in order to correlate physical parameters of charge storage with the breakdown phenomena observed in voltage tracking resistance tests (VTR). Differential scanning calorimetry (DSC) measurements were also performed in order to verify if some of the TSC peaks arise from relaxation processes associated with eventual morphological and/or structural modifications. A correlation is shown between material conductivity and voltage tracking resistance
Keywords :
XLPE insulation; calorimetry; electric charge; electric current measurement; electric resistance measurement; electrical conductivity; insulation testing; power cable insulation; power cable testing; relaxation; thermal analysis; thermally stimulated currents; HDPE; PVC; XLPE; breakdown phenomena; charge storage; differential scanning calorimetry; insulating materials; material conductivity; medium voltage distribution cables; morphological modifications; physical parameters; relaxation processes; structural modifications; thermally stimulated current measurements; voltage tracking resistance; voltage tracking resistance tests; Breakdown voltage; Cable insulation; Current measurement; Dielectrics and electrical insulation; Electric variables measurement; Electrical resistance measurement; Energy measurement; Insulation life; Plastic insulation; Polymers;
Conference_Titel :
Electrets, 1994. (ISE 8), 8th International Symposium on
Conference_Location :
Paris
Print_ISBN :
0-7803-1940-0
DOI :
10.1109/ISE.1994.515247
