Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 104
I Cxciter S/nchronouiMotor^m — Boi (Srounalea) . equalizer Fig. 137.—Connections for an a.c.-d.c. motor-generator substation. D. C. MOTORS AND SPEED CONTROL 93
Electric wiring
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
