Title :
Moisture uptake of mineral oil at different air relative humidities and temperatures
Author :
Fofana, I. ; Borsi, H. ; Gockenbach, E.
Author_Institution :
Schering Inst. of High Voltage Tech. & Eng., Hanover, Germany
Abstract :
We report here the results of the simulation of a defect in the breathing system of a high voltage transformer. These investigations serve also to evaluate the moisture uptake velocity of mineral oil under selective conditions. The studies were performed at temperatures between 23 and 60°C while the surrounding air relative humidity was varied between 20 and 90% to simulate climatic variations. The results were discussed regarding the AC electric strength standard according to VDE or IEC. Finally a correlation between the surrounding air relative humidity, temperature and oil moisture uptake rate is proposed
Keywords :
dissolving; electric strength; humidity; power transformer insulation; transformer oil; 23 to 60 C; AC electric strength standard; IEC; VDE; breathing system; climatic variations; defect simulation; high voltage transformer; mineral oil; moisture uptake velocity; relative humidity; temperature dependence; Atmosphere; Dielectrics and electrical insulation; Humidity; Minerals; Moisture; Oil insulation; Petroleum; Power transformer insulation; Temperature; Voltage transformers;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2000 Annual Report Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-6413-9
DOI :
10.1109/CEIDP.2000.885280
