By Topic

Diagnoses of A-C Generator Insulation Condition by Nondestructive Tests [includes discussion]

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

1 Author(s)
A. W. W. Cameron ; ASSOCIATE MEMBER AIEE, The Hydro-Electric Power Commission of Ontario, Toronto, Ontario, Canada.

Data are presented from comparison of nondestructive and destructive tests on several synchronous generator stators ranging from 800 to 33,000 kva. It is shown that the breakdown voltage of the weakest point in a winding can be forecast nondestructively by insulation resistance tests at increasing voltages. A new method of stating dielectric-absorption effect is suggested and its value as a criterion of mechanical strength of hidden insulation is indicated. The detection and location of internal voids in coils, by ionization tests of established types, are described and comment is made on the relation of such voids to interturn and interstrand faults. The simple test equipment used is briefly described. A routine test program based on the findings is outlined. Proposals are given for lines of further study. Tests to date have been concerned chiefly with the varnish-bondedmica type of insulation, but there are indications of wider applicability.

Published in:

Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems  (Volume:71 ,  Issue: 1 )