Title :
Ester fluid Midel 7131 as PCB-substitute for distribution transformers
Author_Institution :
Schering-Inst. for High Voltage Eng. & High Voltage Plants, Hannover Univ., Germany
Abstract :
The electric and dielectric behavior of ester fluid considered as a substitute for PCB is examined. After a short description of the insulating fluid, the authors consider the influence of temperature differences and aging condition of the insulation on the breakdown behavior of the fluid-paper combined dielectric. Furthermore, a comparison of the breakdown and aging behavior of cellulose-ester impregnated and aramid-ester impregnated insulating materials is given. Finally, the influence of partial discharge prestressing on the breakdown behavior of the fluid-paper combined dielectric is shown
Keywords :
ageing; electric breakdown of liquids; organic insulating materials; partial discharges; power transformers; transformer insulation; Midel 7131; aging condition; aramid-ester impregnated; breakdown behavior; cellulose-ester impregnated; distribution transformers; ester fluid; fluid-paper combined dielectric; insulating fluid; partial discharge prestressing; temperature differences; Aging; Chemicals; Combustion; Dielectrics and electrical insulation; Electric breakdown; Fault location; Fires; Power transformer insulation; Temperature; Viscosity;
Conference_Titel :
Conduction and Breakdown in Dielectric Liquids, 1990. ICDL 1990. Conference Record., 10th International Conference on
Conference_Location :
Grenoble
DOI :
10.1109/ICDL.1990.202956
