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 142
d by channels and ducts throughwhich a continual circulation of oil. is maintained. The result is uniform temperaturethroughout the transformer, thus eliminating the detrimental effects of unequal expansionin the coils with consequent rubbing and abrasion of the insulation. 1,400 HAWKINS… … FlG. 1,945.—Cover construction of Wagner 350 kva., oil filled 1,100-2,200 volt transformer.In transformers with corrugated cases, the base and top ring arc cast to the corrugated iron sheets. Ques. Are the iron or copper losses the more im-portant, and why? Ans. The iron losses, because these arc…
Electrical engineering
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