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 398
s and instruments which may be calculated by I2E. Method of Dr. Humpner. Iron iioss.— The following diagramshows the connections for Dr. Sumpners test for iron losses. The low-pressure side is connected to a source of current of the same pressure atwhich the transformer is expected to work, thus… … Fig. 70. Dr. Sumpners Test for Iron Losses. Copper Iioss. —The next diagram shows the connections for determin-ing the copper losses. The low-pressure side is short-circuited through anammeter, the high-pressure side being connected to the 100-volt supply-mains. The resistance R is then adjusted to…
Electrical engineering
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