학술논문
Studying the loss of life of natural-ester-filled transformer insulation: impact of moisture on the aging rate of paper
Document Type
Periodical
Author
Source
IEEE Electrical Insulation Magazine IEEE Electr. Insul. Mag. Electrical Insulation Magazine, IEEE. 33(1):15-23 Feb, 2017
Subject
Language
ISSN
0883-7554
1558-4402
1558-4402
Abstract
Moisture is one of the most harmful agents for transformer solid insulation. The catalyzing effect of moisture on the degradation process of paper and pressboard has been studied by several authors, who developed models which they used to estimate how the aging process would be accelerated in the presence of water [1]–[5]. In [2] and [3] Lelekakis et al. reported the results of an experimental study in which samples with different moisture contents were aged in the presence of mineral oil (MO). In [3] an equation to determine the reduction of service lifetime of insulation subjected to increased temperature and with increased moisture content is proposed.