International Library of Technology · Scranton, International Textbook Co. · leaf 131
erated in one large 42 ELECTRIC RAILWAYS. 20 central station by revolving-field, three-phase alternatorsdirect-connected to 8,000-horsepower engines. The use ofthe revolving-field type of machine enables the current tobe generated at 11,000 volts in the machine. It is dis-tributed to a number of… … change the alternating current to direct current at about625 volts, and from the substations it is supplied to thecars by means of a third rail and the ordinary track. Thesystems of distribution used by the Metropolitan RailwayCompany, of New York, and the London Underground arealmost exactly the…
Electrical engineering
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