Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1271
le for synchronizing connections. 1 Hand-wheel and chain operating mechanism for fieldrheostat. 1 S. P. S. T. carbon break field switch with dischargeclips. 1 D. P. D. T. engine governor control switch. 1 T. P. S. T. oil switch. 1 Current transformer for instruments. 2 Potential transformers for… … Fig. 560rear view of fig. 559 Switch Boards 1237 wattless component, the potential coil of the indicatingwattmeter is wired to the potential reversing switch, whichis normally held by a spring so as to connect the instrumentup as a wattmeter. By throwing the switch against thespring into the other…
