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BS 89-5 90th Edition, August 31, 1990
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Direct Acting Indicating Analogue Electrical Measuring Instruments and Their Accessories Part 5: Special Requirements for Phase Meters, Power Factor Meters and Synchroscopes
Includes all amendments and changes through Reaffirmation Notice , July 15, 1999
Page Count:16
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Classification, construction, marking, electrical and mechanical requirements and tests for phase meters, power factor meters and synchroscopes. To be read in conjunction with BS 89:Part 1