DocumentCode :
1157881
Title :
Loading of Ventilated Dry-Type Transformers
Author :
Whitman, L.C.
Volume :
76
Issue :
3
fYear :
1957
fDate :
4/1/1957 12:00:00 AM
Firstpage :
1077
Lastpage :
1084
Abstract :
This is a continuation of the previously published data on the loading of sealed dry-type transformers.1 With the same representative core and coils as were used in the previous work, and the sealed tank replaced with a louvered casing, the winding temperature rises are measured for a variety of loads following several steady-state conditions. These data are converted to hottest-spot temperatures utilizing previously published hottest-spot increments and the allowable limits specified in the standards. Aging rates are those for the presently used materials in ventilated dry-type transformers. Insulation aging is computed for various overload cycles and the allowable loads determined for normal life expectancy as well as a few specified per cent loss-of-life criteria.
Keywords :
Aging; Brushes; Commutation; Frequency; Induction motor drives; Power transformer insulation; Temperature dependence; Temperature measurement; Thermal loading; Thermal resistance;
fLanguage :
English
Journal_Title :
Power Apparatus and Systems, Part III. Transactions of the American Institute of Electrical Engineers
Publisher :
ieee
ISSN :
0097-2460
Type :
jour
DOI :
10.1109/AIEEPAS.1957.4499721
Filename :
4499721
Link To Document :
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