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 334
Standard frequenciesare 25, 40, and 60 cycles. Shell Type. In shell-type transformersthe coils, both primary and secondary, are usu-ally wound in pancake form on formers, asshown in Figs. 260 to 263. The coils in smalltransformers are wound with round wire, but inthe larger sizes flat rectangular… … Fig. 263. Method of Binding up Pancake Strip Coils 297 284 ALTERNATING-CURRENT MACHINERY and other conditions. The thin pancake coils are then treatedwith an insulating compound and wound with a number of layersof tape according to the voltage for which they are designed, eachlayer being given…
Electrical engineering
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