Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 89
Fig. 122. Fig. 123. Fig. 122.—Connections for an externally controlled automatic booster system (Hubbardsystem). The series field, S, of the exciter, E, opposes the e.m.f. of the generator, G, and undernormal conditions the exciter e.m.f. just neutralizes the generator e.m.f., and there is no…
Electric wiring
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
