Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 159
500-voltcircuit to 110 volts. The resister grids are of the type used on railway cars. The voltage canbe varied by the water rheostat. Fig. 234.—Connections for typical series-motor starter, with no load release, M, in serieswith the motor. The electromagnet, M, holds the rheostat arm on the last… … Fig. 235.—Typical series-motor starter with no-load release across the line.
Electric wiring
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