Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 308
When the line voltage increases, the plunger of thesolenoid is raised and closes the motor circuit, and the motorthen turns the regulator in such a direction as to lower the volt-age. When the line voltage decreases, the plunger of the solenoiddrops and reverses the motor, so that it now turns the… … j®u
Electrical engineering
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