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 1263
n Fig. 551 for 4,000 ampere (and larger) ma-chines. The upper switch being the main switch. Therear view of these large capacity pedestals is shown in Fig.556. A better view of the 4,000 ampere toggle operated mainswitch is given in Fig. 553. The quick-break S. P.-S. T.switch is illustrated in Fig.… … Fig. Fig. 5 51 Fig. 550 pedestal panel for main and equalizer switches small capacity Fig. 551 main and equalizer switches for large capacity If this were not done the fields would act like a kicking,or spark coil and their insulation be damaged. In Fig. 556 is seen the diagram of the panel shown…
