Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 138
en a considerablechange in the value of Ia will have comparatively little effect onthe total current Ii so that the voltage er will not be greatlyaffected, the voltage Ea will therefore remain approximately con-stant and the speed regulation will be fairly good. The methodis not economical since… … Fig. 133.—Connection for slow speedoperation of shunt motors. CHAPTER XIX HAND-OPERATED FACE PLATE STARTERS AND TROLLERS CON- If a switch is opened in a circuit carrying current, an arc willbe formed and, unless proper precautions are taken, the switchcontacts will be burned. 135. Knife switches…
Electrical engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer02inte-237-122.webp)
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer04inte-344-145.webp)
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer04inte-147-50.webp)
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer02inte-353-198.webp)