File:Image from page 145 of "Electric railway review" (1906) (14572052757).jpg

Identifier: electricrailwayr162amer Title: Electric railway review Year: 1906 (1900s) Authors: American Street and Interurban Railway Association Subjects: Street-railroads Electric railroads Publisher: Chicago : Wilson Co

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Text Appearing Before Image: ok-type selectorswitch by means of which a transformer unit can be thrownonto either of the duplicate sets of 14,000-volt busbars. Theupper terminals of the hook switches for each of the phasesare connected to the upper busses and the lower terminals tothe lower busses. These selector switches are in a line acrossthe building with the transformer unit and oil switch withwhich they are connected. The duplicate sets of three-phase, 14,000-volt busbarshave their various conductors separated by 2-inch soap-stone barriers set 9 inches in the masonry wall which sup-ports them and projecting 15 inches. The busbars extendhorizontally along the side of the division wall opposite thetransformers. The conductors are of strap copper with %-square-inch cross section so fastened to the top of the insula-tors that the cross section may be increased by bolting on asimilar strap of metal. The hook type of disconnecting switches which permitsof anv oil-switch set being disconnected from the busses, are

Text Appearing After Image: rT::? Brunots Island Transformer Station.—Vertical Section tliroughTransformer and Busbar Rooms. mounted on an angle-iron frame, which also supports two1% X 3-inch wooden guard railings. In the room with the oil switches controlling the high-tension current from the three pairs of step-up transformersis an oil switch by means of which the duplicate high-tensionbusbars may be paralleled. This switch is remotely controlledfrom a button in the power house on the same panel with theswitch for paralleling the duplicate sets of low-tension bus-bars. Transmission Room. The high-tension busbars extend through openings in theend wall and connect with similar busbars mounted on thiscross wall which sets off the feeder switch room or trans-mission feeder room. Current is taken to the automatic oilcircuit breakers controlling the outgoing feeders by means ofcables connected to the duplicate sets of busses through themedium of hook-selector switches similar to those previouslydescribed. The out-

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