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 134
WKINS ELECTRICITY Ques. How is economy of construction obtained indesigning combined core and shell transformers? Ans. The cross section of iron in the central leg of the coreis made somewhat less than that external to the coils, in orderto reduce the amount of copper used in the coils. Single and… … PRI MARY OIL CHANNELS Fig. 1.933.—Plan of Core of General Electric combined core and shell transformer. The coreused contains four magnetic circuits of equal reluctance, in multiple; each circuit consist-ing of a separate core. In this construction one leg of each circuit is built up of two…
Electrical engineering
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