. Electric railway review . r the mainunits, each with cylinders 3 and 2 by 3 inches. The current from the generators is led to a set ot 3,300-volt. three-phase busbars. From these busses one phase istap[)ed to feed the immediate sections of the trolley from another phase is stepped up by three transformers to 33,000 volts pressure and distrib-uted to the transformer stations along the line, where it isstepped down to 3,300 volts pressure to feed the trolleywire. The transformers and switchboard will when the plantis completed, stand on a gallery along the side of th
. Electric railway review . r the mainunits, each with cylinders 3 and 2 by 3 inches. The current from the generators is led to a set ot 3,300-volt. three-phase busbars. From these busses one phase istap[)ed to feed the immediate sections of the trolley from another phase is stepped up by three transformers to 33,000 volts pressure and distrib-uted to the transformer stations along the line, where it isstepped down to 3,300 volts pressure to feed the trolleywire. The transformers and switchboard will when the plantis completed, stand on a gallery along the side of the engineopposite the turbines, the switchboard operator being at aboutthe same height as the generators. The switchboard willinclude 2 machine panels, 2 exciter panels, 1 panel with fortwo 33,000-volt transmission lines, 1 panel for cutting thetransformers on and off the 3, volt bus, 3 panels for 33,000-volt side of transformers, and one panel for each of the fol-lowing: blower sets, station lighting. Tirrell Toledo & Chicago Interurban Railway—Interior of Front VestibuleShowing Control Apparatus. trols the oil switches for the line side of the transformersand the other panel controls two 3,300-volt feeder high-tension oil switches are set in separate fireproofcompartments. The wiring for the switch and transformerconnections is carried on standard line arresters supporte;!by a pipe-rack. The circuits on both sides of the transform-ers may, in emergency, be opened at knife switches whichare provided. The transforming station at Garrett has 594 ELECTRIC RAILWAY REVIEW October, 1906. switches and connections for handling two outgoing feederlines to the other stations. Rolling Stock. At present cars are operated on two-hour headways overboth branches. This arrangement will probably be continuedthrough the winter. The rolling stock includes six 52-foot single-end three-compartment cars built by the Niles Car Company. Theseating capacity of
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