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 194
and motor circuitsare shown in simplified form in Fig. 72. The main circuits are inthe upper left-hand corner and the control circuits are in the lowerright-hand corner. In the lower left-hand corner is a table showingthe sequence of switches corresponding to the several series andparallel… … Fig. 73. Piping Diagram, Westinghouse Multiple-Unit System coils of the unit switches are separated from the correspondingcontact fingers. They may readily be identified by the designatingletters and figures. As the details are the same as in the Sprague-General Electric system, the student will be…
Electrical engineering
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