Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 88
an auxiliary contact connected tothe main contact through a resistance C, but otherwise insulated from it. This auxiliary con-tact prevents the opening of the circuit, and the resistance C prevents the short-circuiting ofthe cell connected across adjacent point. Fig. 119.—Connections for a shunt… … Fig. 120.—Connections for a non-reversible automatic booster system. The series field,S, opposes the generator, e.m.f. lamps are connected across the generator, where the e.m.f.remains constant, while the motors are connected across the battery, where the e.m.f. dropsas the load comes on.
Electric wiring
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