International Library of Technology · Scranton, International Textbook Co. · leaf 313
second-ary, which is so connected to the auxiliary coil that thecurrent in this coil opposes that in the main coil. The § 17 ELECTRIC LIGHTING. 21 result is that the hand on the voltmeter goes Dack, and thepressure must be raised to bring it up to its proper value.By plugging in at different points… … Fig. 25. line on which it is to work, it requires no further attention.Tables are furnished with the instrument showing how toset it, and care must be taken in setting to insert the extraplug g, Fig. 24, before withdrawing the plug h already inuse, otherwise the circuit will be opened. 18. The…
Electrical engineering
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