. The Street railway journal . TRANSFORMERS IN SUB-STATION Seattle Electric Company. It is located in the motor generatorroom. MOTOR GENERATOR ROOM The motor generator room is 43 ft. 11 ins. long by 24 ft. 3 externally, and also contains a General Electric typeM. P., 8-pole, 300-kw, 450 r. p. m., 600-volt direct-currentcompound-wound railway generator, direct coupled to a Gen-eral Electric 450-hp, 2200-volt, two-phase, 60-cycle inductionmotor. Each induction motor has sixteen poles and a full load. May 2, 1903.] STREET RAILWAY JOURNAL. 653 efficiency of per cent at 90 per cent po
. The Street railway journal . TRANSFORMERS IN SUB-STATION Seattle Electric Company. It is located in the motor generatorroom. MOTOR GENERATOR ROOM The motor generator room is 43 ft. 11 ins. long by 24 ft. 3 externally, and also contains a General Electric typeM. P., 8-pole, 300-kw, 450 r. p. m., 600-volt direct-currentcompound-wound railway generator, direct coupled to a Gen-eral Electric 450-hp, 2200-volt, two-phase, 60-cycle inductionmotor. Each induction motor has sixteen poles and a full load. May 2, 1903.] STREET RAILWAY JOURNAL. 653 efficiency of per cent at 90 per cent power factor. Thedirect-current generator has an efficiency of 93 per cent be-tween full load and 50 per cent overload. The rotor of theinduction motor weighs 5500 lbs., and the stator 12,500 lbs.,while the set weighs 53,000 lbs., or about 177 lbs. per floor space occupied by theset is about 8o}i sq. ft., the foun-dation layout being practically 9ft. 6 ins. X 8 ft. 6 ins. This givesabout 39 sq. ins. per kilowatt. j TRANSFORMER ROOM j The transformer room at theend of the building is 46 ft. 6ins. long by 30 ft. wide first story contains twoGeneral Electric i8o-kw, 25,000-2200-volt, 6o-cycle oil-cooledthree-phase two-phase step-down transformers, which convert the high-tension line current intoa two-phase lower-tension current, adapted for the use of theinduction motor-generator set. These transformers are of suf-ficient capacity, allowing for power factor, to supply one motorge
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
