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 536
, in pounds. B. H. P. at 500 volts =EI .P. (2 7! 2tt DR T 33,000500DR XE )T 746500 I 33,000— E.H.P. supplied to motor. = E.H.P. supplied to motor at 500 volts. ^ . M B.H.P. B.H.P. at 500 volts Efficiency of motor =lorp- X v„„ a, fino -tt-- Draw-bar Pull and Efficiency Test Without Removing-Motor… … Fig. 81. Let D = diameter of car wheel in feet. ■k = 3.1416, T= force on scale in pounds,L = length of long arm of lever,L, =. length of short arm of lever,li = revolutions per minute.Place a jack-screw under each side of the car, and lift the body until thereis only friction enough between wheels…
Electrical engineering
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