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Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)

Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 74

An illustration from Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers, 1901, leaf 74
MEASURING THE INSULATION RESISTANCE. 61 … Connect, as in Fig. No. 52, all symbols having the same meaning asbefore.Let r = insulation resistance of dynamo, then r^-(f-l). MEA§rKIIIfG THE IlillATIOlf RESISTANCE ©e MOTORS. Where motors are connected to isolated plant circuits with known highinsulation, tbe formula vised for insulation of…

Electrical engineering

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