International Library of Technology · Scranton, International Textbook Co. · leaf 93
rom a central station. Allstreet-railway systems are, therefore, operated at approxi-mately constant potential, i. e., constant or nearly constantpressure is maintained between the trolley wire and thetrack by means of the dynamos in the station. Wheneverconnection is made from the trolley to the… … 20 ELECTRIC RAILWAYS. 5. Schemes have been brought forward from time totime for operating street cars in series, but none of thesehave ever been put into everyday operation, and it is notworth while devoting space to them. The arrangement shown in Fig. 1 may of course be modi-fied. For example,…
Electrical engineering
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