Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 283
ays. The resistanceof these coils can be measured by means of a Wheatstone bridgeemploying a telephone receiver in place of the galvanometer usedin such bridges in laboratory practice; but other less delicate testsare also in use. Another method is to pass a known current through the coilto be… … Fig. 135. Diagram Showing Transformer Test A simple method, and one which Involves no delicate Instru-ments, Is largely used in railway shop practice. This is known asthe iransjormer test for short-circuited coils. It requires an alter-nating current which can easily be supplied either by a…
Electrical engineering
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