Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 104
Fici. 138.—Plain series motor with starter.The speed varies with the load. Fig. 139.—Reversing series motor withstarter. … Fig. 140. -Series motor. Speed regulation by inserting resistance in series.resistance decreases the speed. Increase in
Electric wiring
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