. American engineer and railroad journal . rete foundation, the roof and floor being of reinforced con-crete. The floors are supported upon steel beams, but the roofbeams are of reinforced concrete. This building measures 39 in. by 44 ft. on the outside and is 29 ft. 10 in. high from thetop of the foundation to the top of the parapets. The basement of the building contains one of the transformeroil tanks and an oil pump. The main floor is divided into threerooms, the main transformer room being 43 x 17 ft. and extend-ing the full height of the structure. The remaining space of themain flo
. American engineer and railroad journal . rete foundation, the roof and floor being of reinforced con-crete. The floors are supported upon steel beams, but the roofbeams are of reinforced concrete. This building measures 39 in. by 44 ft. on the outside and is 29 ft. 10 in. high from thetop of the foundation to the top of the parapets. The basement of the building contains one of the transformeroil tanks and an oil pump. The main floor is divided into threerooms, the main transformer room being 43 x 17 ft. and extend-ing the full height of the structure. The remaining space of themain floor is divided into a high tension room, through whichthe 60,000 volt circuit enters and an operating room where allof the 11,000 volt switching apparatus and measuring instru-ments are located. Over the operating room is a mezzanine * Based on an extensive descriptive article prepared and furnished byMr. W. N. Smith, electric traction engineer, Westinghouse, Church, Kerr& Co. December, 1907. AMERICAN ENGINEER AND RAILROAD JOURNAL. 475. VIEW SHOWING BRACKET AND SPAN CATENARY TROLLEY SUPPORTS—ERIE ELECTRIFICATION. floor on which is located the 11,000 volt lightning arrestors, the60,000 volt choke coils and the 60,000 volt series coils. The ar-rangement of these rooms and circuits is shown in one of theillustrations. The transmission line terminates at the lightning arrestoryard in the rear of the substation, where an arrangement of60,000 volt lightning arrestors is provided. From this the threehigh tension conductors enter the substation through glass discsheld in 36 in. tile set in the upper portion of the rear wall ofthe substation. The circuit after entering the station passesthrough three circuit breakers mounted directly inside of therear wall, thence over bare copper conductors to the three oilinsulated choke coils on the mezzanine floor, thence to three oilinsulated series transformers, from which connections are takento the power measuring instruments in the operating r
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