Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 118
Fig. 173.—Three-phase induction motor with wound secondary. The resistance, R,connected across the slip rings may be internal or external. It is left in circuit until the motorhas come up to speed, when it is short-circuited. When external to the motor, it is sometimesused to regulate the speed,… … Ammeter Core/ Mo/cfen S. T.O/7 S/vJCch r-^=
Electric wiring
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
