Title :
Investigation of ageing phenomena on epoxy resin insulation materials
Author_Institution :
Inst. of Electr. Power, Budapest, Hungary
Abstract :
Different types of epoxy resin current and voltage transformers were tested in order to determine the insulation degradation caused by partial discharges and their ageing characteristics. The deterioration process was regularly controlled by measuring the amount of partial discharge, the capacity and loss angle. Dangerous degradation of insulation was detected. The dielectric strength of different types and different composition of epoxy resin components was determined. The evaluation of tests was carried out by using mathematical statistical methods
Keywords :
ageing; capacitance; current transformers; electric breakdown; electric strength; epoxy insulation; insulation testing; life testing; partial discharges; potential transformers; power transformer insulation; power transformer testing; 1 MHz; 1.9 MHz; 20 to 30 kV; ageing phenomena; breakdown frequency; breakdown voltage; capacity; current transformers; dangerous degradation; deterioration process; dielectric strength; epoxy resin insulation materials; insulation degradation; loss angle; partial discharges; statistical methods; test evaluation; voltage transformers; Aging; Degradation; Dielectric measurements; Dielectrics and electrical insulation; Epoxy resins; Insulation testing; Partial discharges; Power transformer insulation; Process control; Voltage transformers;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1994., Proceedings of the 4th International Conference on
Conference_Location :
Brisbane, Qld.
Print_ISBN :
0-7803-1307-0
DOI :
10.1109/ICPADM.1994.414122
