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BS 4819-2:1989 Resistance welding water-cooled transformers of the press-package and portable types. Specification for portable transformers
standard by BSI Group, 09/29/1989
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Requirements, methods of test, service conditions and rating of single-phase, mains frequency transformers having a primary voltage of 660 V or less.Cross References:
BS 499:Part 1
BS 2754
BS 5490