Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1257
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. 5 5 0. Fig. 551 Fig. 550 pedestal panel for main and equalizer switches small capacity Fig. 551main 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…
