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 648
ister ;If the maximum load lasts 10 minutes, 95 % will register ;If the maximum load lasts 30 minutes, 100 </0 will register. The following figure shows the working parts in theory, which, being ofu!ass and liquid, are placed in a cast-iron case, with a glass front to permitreading. As shown,… … A b, Air Bulb. I T, Indicating tube. L, Liquid. ^> Direction. Fig. 47. Wright Discount Meter. The heat due to the current passing in the circuit expands the air in thebulb, which forces the liquid down in the left column and up in the right.Should the quantity of heat be such as to force some of…
Electrical engineering
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