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 420
s. The advantage of auto-trans-formers lies in the greater efficiency and lower cost for the samecapacity, and these advantages become more marked as theratio approaches unity. Since the low-tension coil is connected electrically to thehigh-tension coil, there is great danger to life and propertyif… … Amp. Fig. 261. — Diagram of an auto-transformer. Ratio 1: 4. 384 ELECTRICITY AND MAGNETISM When the voltage is low and is to be changed only slightly,the auto-transformer is very much cheaper than the ordinarytransformer. 262. Special types of transformers. The step-down trans-former is often used…
Electricity · Magnetism
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