Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 268
D y / 1 20 / / 1 1 10 / 11 0 / —■ — Toti,! Losses 180160 J.. 0 60 Fig. 264. 100 IZOKillowaHs OutputEfficiency Curve of 140 D Generator, 250v., 150 Kw., 225 R.P.M. ing friction and windage as f of 1 per cent of the output, that is,equal to 1,000 watts. Efficiency. The total rated-load losses are… … DESIGN 925 Hence the efHciency, Fig. 264, is 150,000 ^, , 163:933 = ^^^ P * Heating, (a) Armature. From the drawings the radiating surface of the armature is found to be 4,510 square inches, counting cylindrical surface, and tails of rear flanges; the peripheral speed is 2,650 feet per minute. The…
Electrical engineering
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