Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 242
D -8 SHUNT FIELD Fig. 4,162.—Diagram of Otis style GS direct current, two speed controller. 2,896 HAWKINS ELECTRICITY controller panel, this simple operation enabling one to lift approximatelytwice the normal load at half the normal speed. In order touse this arrange-ment with astandard… … The knifeswitch referredto above re-arranges thearmature start-ing resistanceand prevents theweakening ofthe shunt field.This also adjuststhe series relaysso that equallygood conditionsof accelerationare obtained inboth methods ofoperation. Themotor will notbe worked aboveits rated capac-ityin…
Electrical engineering
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