Electricians' operating and testing manual; a hand book for men in charge of electrical apparatus, repair men, trouble men, lamp trimmers, and electricians generally (1916)
Horstmann, Henry Charles, Tousley, Victor Hugo, 1875- joint author · Chicago, F.J. Drake & co · leaf 356
therefore, befrequently made so as to be reasonably sure that aground will be detected as soon as it comes on. 350 Operating and Testing If a system is to have a thorough test, it must bedisconnected and tested with a Wheatstone bridge orother method described elsewhere. LIGHTNING ARRESTERS A… … Figure 209 great that it is easier for the current to jump a smallair gap than force its way over an ordinary transmis-sion line. The simplest form of lightning arrester is sho\\Ti inFigure 209. When the discharge occurs, the currentjumps the spark gap between the two metal plates M.If these are…
Electrical engineering · Electric testing
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