Title :
Climatic ageing tests on polymeric power cable terminations
Author :
Sens, M.A. ; dos Santos, P. ; Mason, J.H. ; Nunes, S.
Author_Institution :
Electr. Energy Res. Centre, Rio de Janeiro, Brazil
Abstract :
During outdoor service, power cable terminations must withstand the combined effects of sunlight, contamination and moisture in addition to thermal cycles and periodic overvoltage surges. CEPEL has constructed a weathering test laboratory to simulate these conditions. After briefly describing the test chamber and testing schedule, this paper summarizes data and observations made during tests for one year on prototype ethylene propylene rubber terminations for 12/20 kV cables. The EPR terminations suffered negligible degradation during 40 weeks at 13 kV (11 V/mm) while subjected to UV irradiation (max. dose 14 kWh/m2 ) and salt spray for a total of 570 hours. Heat cycling to 60°C tends to reduce surface discharges during salt-fog cycles compared with operation at ambient temperature
Keywords :
ageing; environmental testing; humidity; life testing; materials testing; moisture; organic insulating materials; polymers; power cables; rubber; test facilities; 13 kV; 20 kV; 40 w; 570 h; 60 C; EPR terminations; UV irradiation; ambient temperature; climatic ageing test; combined effects; contamination; data; ethylene propylene rubber terminations; moisture; observations; outdoor service; periodic overvoltage surges; polymeric power cable terminations; power cable terminations; salt spray; salt-fog cycles; sunlight; surface discharges; temperature cycling; test chamber; testing schedule; thermal cycles; weathering test laboratory;
Conference_Titel :
Dielectric Materials, Measurements and Applications, 1988., Fifth International Conference on
Conference_Location :
Canterbury
Print_ISBN :
0-85296-359-9
