International Library of Technology · Scranton, International Textbook Co. · leaf 78
n district rather than a number of smallones. Small transformers are wasteful of power, andthough each in itself may not represent a very large amountof waste, yet when a large number are connected up, thetotal amount of energy that might be saved during a yearby using a few large transformers may… … Three Wire Secondary f Mains 6 O O O o [ Fig. 28. a few large transformers of high efficiency. These are fre-quently connected in pairs so as to feed into three-wiresecondary mains m, m, ;//, as shown in Fig. 28. Theprimaries are connected directly across the line in parallel,and the secondaries…
Electrical engineering
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