Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 1307
9 Fig. 593 allis-chalmers oil-filled self-cooled transformer, 60 cycle,170 k. w., 20,000 to 2,300 volts transformers, as it permits operation at lower temperatures,and allows more margin for overloads. Air-blast transformers are made in sizes from 75 K. V.A. up. Cooling is effected by placing the… … Fig. 594 ALLIS-CHALMERS OIL-FILLED WATER-COOLED TRANSFORMER, 25 CYCLE, 500 k. w., 20,000 to 375 volts _ Transformers 1273 an air chamber in which a pressure of air is maintainedby motor driven fans; currents of air passing up around thetransformer carry off the heat. In this type oil cannot beused…
