ANSI-C57.12.20 › Historical Revision Information
Transformers - Standard for Overhead Type Distribution Transformers, 500 Kva and Smaller
Transformers - Standard for Overhead Type Distribution Transformers, 500 Kva and Smaller
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Document Number
ANSI-C57.12.20
Revision Level
1997 EDITION
Status
Superseded
Publication Date
Jan. 1, 1997