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 18
re these frequencies adapted ? Ans. The 25 cycle frequency is used for conversion to directcurrent, for alternating current railways, and for machines oflarge size; the 60 cycle frequency is used for general distributionfor lighting and power. The frequency of -40 cycles, which once was introduced… … z< Jl r: - ? M C Ques. What arethe advantages oflow frequency } The num:revolutions of the ?is correspondingly Iarc lamps can be morereadily operated; tx -ure regulation;small motors such asfan motors can be oper-ated more easily fromthe circuit. Phase.—As appliedto an alternating cur-rent,…
Electrical engineering
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