Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 104
Fig. 140. -Series motor. Speed regulation by inserting resistance in series.resistance decreases the speed. Increase in … Fig. 141.—Series motor. Speed regulated by inserting resistances in shunt with the fieldwinding. Decrease in resistance increases the speed. 94 WIRING DIAGRAMS OF ELECTRICAL APPARATUS
Electric wiring
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