. American engineer and railroad journal . elaboration. The three fiOO-h. p. engines are of the automatic cut-off type,with gridiron valves, built by Mcintosh, Seymour & Co., eachdriving a General Electric revolving-field tandem-compound engine is a Harrisburg auto-matic engine and drives a alternator of similar are also two simple Harrisburg engines at therear of the main engines, each direct-connected to a dynamo, which furnishes current for excitingthe alternators fields and also for lighting the power-house.
. American engineer and railroad journal . elaboration. The three fiOO-h. p. engines are of the automatic cut-off type,with gridiron valves, built by Mcintosh, Seymour & Co., eachdriving a General Electric revolving-field tandem-compound engine is a Harrisburg auto-matic engine and drives a alternator of similar are also two simple Harrisburg engines at therear of the main engines, each direct-connected to a dynamo, which furnishes current for excitingthe alternators fields and also for lighting the steam pressure used is lbs. The general arrangement of the various engines and of theair compressors (of which only one unit has as yet been in-stalled) is made clear in the foundation plan of the engineroom of this plant presented on page 183 of the preceding(May, 1903) issue. The specifications of the engines andgenerators are presented below in tabular form. The engines driving the alternators are guaranteed not to 1 ^itt. THE 50-KW. GENERAL ELECTEIC CO. EXCITER UNIT. It was, at first, intended to locate the plant at the south endof the shop yard, but this was abandoned on account of thesaving in copper in feeder cables with a central location. As may be seen from the lay-out diagram of the ReadingShops buildings, presented on page 10 of our January, 1903,issue, the location chosen is opposite the center line of thelocomotive machine and erecting shops, with 110 ft. to clearbetween the buildings. The center of the power plant buildingIs 276 ft. from the center of the machine shop. The feedercables are carried into the shop by a spacious wiring tunnel. All the distribution wires leading to the locomotive-shopbuildings are carried in underground tunnels or conduits, so asto present no obstructions and to be entirely protected. Thewires for the distribution to the car shops, depot buildings,etc., are run on overhead pole lines at the higher voltage, thelongest transtni
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