By Topic

Oil Impregnation in Transformer Boards (1) Measurement of Impregnation Depth and Internal Pressure

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
T. Suzuki ; Toshiba Corporation Kawasaki, Japan ; M. Takagi

In transformers several kinds of cellulosic insulating materials are used, e.g. transformer board. In these materials insulating oil must be easily impregnated. Several reports dealing with oil impregnation in transformer boards have been published. However, few reports indicate how to estimate oil impregnation depth. In order to estimate oil impregnation in transformer boards, changes in oil impregnation depth and the increase in internal pressure for transformer boards were measured, varying temperature and atmospheric pressure. It was found that oil impregnation depth increases with time and that the internal pressure in transformer boards increases due to oil impregnation. However, the measured internal pressure did not coincide with the calculated internal pressure without compensation of water vapor in transformer boards. Moreover, it was found that when temperature is increased, insulating oil is more easily impregnated due to the decrease of viscosity.

Published in:

IEEE Transactions on Electrical Insulation  (Volume:EI-19 ,  Issue: 4 )