Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 240
rO rO pie-unit semi-automatic control for use on locomotives. (To face page 224.] I 1 RAILWAY CONTROLLERS AND EQUIPMENT 225 … ^s^Pbs/Hon •— —I 3 -^ Ground Fig. 385.—Diagram showing methods of operation of preventive coils. These preventsparking and short-circuit currents when the voltage is varied by connecting to different tapsfor the auto transformer or compensator. Contacts c/osect / 2 3 4 5 e 7 9 9 <o / • • • • • •…
Electric wiring
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