Formation of gas and wax-like products in oil impregnated paper systems under dielectric stress

摘要

The voltage endurance of liquid impregnated paper insulation is important in both test and service for high voltage equipment such as transformers, capacitors, and cable. It has been recognized for a long time that if electrical discharges occur, they may limit the life. Especially with cable, corona studies have been carried out for many years using both dielectric loss measurements (i. e., Schering Bridge) and several types of amplified band pass techniques for more direct measurement of corona pulses.