Title :
Electrical performance of polymer housed zinc oxide arresters under contaminated conditions
Author :
Chaudhry, V. ; Gorur, R.S. ; Dyer, M. ; Thallam, R.S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Arizona State Univ., Tempe, AZ, USA
fDate :
4/1/1991 12:00:00 AM
Abstract :
The electrical performance of polymer-housed zinc oxide distribution arresters has been investigated in a fog chamber. Two types of housing materials, copolymers of ethylene and propylene (commonly known as EPM rubber) and terpolymers of ethylene propylene and diene (commonly known as EPDM rubber), both containing alumina trihydrate (ATH) filler, have been examined. It has been demonstrated that, under relatively low (250 μS/cm) and moderate (1000-2000 μS/cm) fog conductivity, degradation in the form of tracking and erosion of the housing occurs. On some housings, degradation is dominant in the region of the mold line and is due to nonuniformity in filter dispersion. The electric field has been computed and a few electrode modifications to improve the surface electric field distribution are suggested
Keywords :
electric fields; insulation testing; organic insulating materials; polymers; surge protection; zinc compounds; EPDM rubber; EPM rubber; alumina trihydrate; contaminated conditions; copolymers; diene; electric field distribution; electrical performance; electrode modifications; ethylene; ethylene propylene; filter dispersion; fog chamber; fog conductivity; housing materials; mold line; polymer; propylene; terpolymers; zinc oxide arresters; Arc discharges; Arresters; Corona; Degradation; Insulation life; Moisture; Polymers; Rubber; Voltage; Zinc oxide;
Journal_Title :
Power Delivery, IEEE Transactions on
