Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 126
Conducfiveensa^ion. Com^i /nducfiveComae nsa -fion. Compensator. … Fig. 189.—Single-phase series motor withcompensated armature. Fig. 190.—Tap method of control forsingle-phase series motors. The voltageacross the motors is varied by connecting totaps brought out from an auto-transformer..
Electric wiring
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