An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 401
100kv-a. to 10,000 kv-a. show that the efficiencies run from about91 per cent to 97 per cent. It is, of course, possible to getvery high efficiency by increasing the first cost of the machine.But experience has shown that sometimes it does not pay to build machines for the highest possible… … Fig. 249. — Size of engine required to drive three-phase alternator. For example, what horse power would be required at the pulley infigure 249 when the alternator is impressing 2300 volts on the externalcircuit and delivering a current of 25 amperes, it being assumed thatthe power factor of the…
Electricity · Magnetism
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
