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Improvement of dielectric strength on transformer winding using new aramid paper
Author(s) -
Endoo Kaoru,
Uwano Yoshito,
Hiraishi Kiyoto,
Oonuma Toshiyuki,
Uemura Ryuuji
Publication year - 1995
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391150605
Subject(s) - aramid , dielectric strength , materials science , transformer , electrical insulation paper , dielectric , composite material , electrical engineering , pressboard , field strength , engineering physics , mechanical engineering , magnetic field , engineering , optoelectronics , voltage , physics , quantum mechanics , fiber
Large power transformers using perfluorocarbon liquid have advantages of high dielectric strength, excellent cooling ability, and nonflammability. To make the transformer more compact, it is very important to improve the insulation material. Recently, the authors succeeded in developing a new type of aramid insulation paper which has no fluff on its surface to avoid field concentration. In this study, an outline of the developed paper and the experimental results of the insulation strength on turn‐to‐turn and intercoil models are described. It was found that the new aramid paper increases the insulation strength 1.2 (turn‐to‐case) to 1.7 (intercoil case) times that of the existing insulating paper.