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 1293
Fig. 581 1258 Steam Engineering trates the successive steps for transferring the lamps oftwo independent circuits from two generators to one with-out extinguishing the lamps on either circuit. This process is a very simple example of switchboardmanipulation, but illustrates the method used for all… … Fig. 582 The location of plugs is shown by the black circles, whichindicate that the corresponding bars of the horizontal andvertical rows are connected. Circuits No. 1 and No. 2, running independently fromgenerators No. 1 and No. 2, respectively, are to be trans-ferred to run in series on…
