Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 387
insulation may readily with-stand the momentary application of a voltage five or ten times the normalstrain, yet continued applic ition of the voltage may injure the insulationand permanently reduce its strength. Attention has been called to the fact that in testing between the primaryand the core… … Fig. 61. much greater than the strain to which the insulation is subjected undernormal working conditions, and greater therefore than it is designed towithstand. In testing between the primary and the core, the induced po-tential between the secondary and the core may be several thousand volts,and…
Electrical engineering
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