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 408
of small engine-type and belted-type machinesare wound with square copper wire, having rounded edges andinsulated with a double layer of cotton. On larger machines ofboth types the field coils consist of copper strip wound on edge, andinsulated with paper and insulating varnish. At one side of… … Fig. 15S. 250 K. V. A., Three-Phase Triumph Alternator belted generators, a ventilating duct passing through the middle ofthe coil. The collector rings for conducting the exciting current tothe field coils are of cast iron, mounted on a separate spider and wellinsulated therefrom. The brush holders…
Electrical engineering
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