. The street railway review . irs in the room immediately under the high tension room, andeach pair reduces the three-phase line current at 15,000 volts to two-phase current of the voltage ref|uircd for its particular transformer is set on a separate wooden base and the floor isarranged with sub-ways so that all of the low tension wiring is be-low the floor. The sub-station was installed so as to enable theoperation of four varieties of electric service, viz.: (i) a single-phase 2,400-volt lighting system for residence and outlying districts;(2) a 2,400 volt two-phase power servic
. The street railway review . irs in the room immediately under the high tension room, andeach pair reduces the three-phase line current at 15,000 volts to two-phase current of the voltage ref|uircd for its particular transformer is set on a separate wooden base and the floor isarranged with sub-ways so that all of the low tension wiring is be-low the floor. The sub-station was installed so as to enable theoperation of four varieties of electric service, viz.: (i) a single-phase 2,400-volt lighting system for residence and outlying districts;(2) a 2,400 volt two-phase power service for synchronous and in-duction motors; (3) a soo-volt direct current power service for di-rect current motors, elevators, etc., and (4; a 220-volt direct currentthree-wire service lor incandescent and constant potential arc light-ing on either the 110 or 220-voll system. The 2,400-volt single-phase lighting circuits arc, of course, merely one side or the otherof ihe two-phase 2,400-volt power system, as the delivery of both. FIG. 6-DI.\GRAM OF CIRCUITS. San Gabriel Electric Company arc of the self-cooling, or oil-in-sulated, air-cooled type, and except that difTercnt numbers of leadsare taken out from the dilTcrcnt styles of transformers as they maybe adapted for rendering various characters of service. The transmission proper is on the Scott system, that is, two-phasegeneration, three-phase transmission, and two-phase four 2S0-k. w. step-up transformers at Azusa are, therefore,two-phase three-phase transformers, and step-down transformers atLos Angeles are three-phase two-phase transformers, but the lastnamed deliver variable electromotive forces as required, while theformer are wound at a fixed ratio, approximately taking 500 voltsand delivering 1( volts to line. The noteworthy features of theline are that it is in two three-phase circuits, each consisting ofthree No. 5 hard drawn copper wires, supported on s2-in. Lockeglass insulators which are mounte
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
