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 1280
Fig. 574 i<^ig. 575 Fig. 574 starting panel for d. c. blower set Fig. 575 main switch panel for a. c. blower set The operation of several sub-stations on a single line isgenerally recognized as good practice. To insure continuity of service in the event of linetrouble^ it is expedient to…
