Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 150
the passages. Ones. How much air is used ordinarily for coolingper kw. of load ? Ans. About 150 cu. ft. of air per minute. 1,408 HAWKINS ELECTRICITY In forced draught transformers, the air pressure maintained by theblower varies from ^ to 1^ oz. per square inch. Forced draught orair blast… … Fig. 1965.—Looking down into a Wagner centralboard, which provides facility for varying tlchanging the primaries. tii n transformerf showing the connectionatio of transformation and also for inter- allow the oil to circulate by connection and thus serve as amedium to transmit the heat to the case,…
Electrical engineering
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