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BS 89-3:1990
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BS 89-3:1990 Direct acting indicating analogue electrical measuring instruments and their accessories. Specification for special requirements for wattmeters and varmeters
standard by BSI Group, 08/31/1990
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Full Description
Classification, construction, marking, electrical and mechanical requirements, and tests for analogue wattmeters and varmeters. To be read in conjunction with BS 89:Part 1Cross References:
BS 89:Part 1
BS 89:Part 7
BS 89:Part 9
IEC 185