Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 330
in the line when Y-connected = 1.,/S Now Is is 5 times full-load current, so that, when the motor is Y-connected,the starting current in the line is 1/3 X 5 or 1.67 times full-load current.The starting torque, however, is only 0.5 times full-load torque and, if thisis not sufficient to start the… … Fig. 356.—Sliding contact type of starter for a wound-rotor induction motor. resistance R in the rotor circuit is gradually cut out as the motorcomes up to speed. Since the rotor is wound in three sections, see page 290, threesets of contacts are required which for small motors are generallymounted…
Electrical engineering
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