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NEMA Std TR-1 on Transformer.

NEMA Std TR-1 on Transformer.

NEMA Std TR-1 on Transformer.

(OP)
The above  was (is?) a popular standard on Transformers.The last edition seen was 1980. Is it still valid? Or Revised?If so when?

RE: NEMA Std TR-1 on Transformer.

TR-1 is an active NEMA document.

Go to WWW.nema.org; search function; enter search standards; enter TR-1.

You will find the standard is active: TR 1-1993 (Revised 2000)and available.

RE: NEMA Std TR-1 on Transformer.

Suggestion:
There are other industry standards on transformers, e.g. IEEE Stds at
http://www.ieee.org

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