International Library of Technology · Scranton, International Textbook Co. · leaf 85
the way inwhich the bar-to-bar test will indicate various kinds of faults, we will suppose that incoil.iV there is a shortcircuit, that the commu-tator leads of coils S,K, and ^Fhave beenmixed, as shown, and thatthere is an open circuit incoil T. Current will flowthrough the top coils fromA to B,… … 98. It is evident that the deflection of the galvanometerwill depend on the difference of potential between the bars.If everything is all right, practically the same deflectionwill be obtained all around the commutator, no matter onwhat pair of bars C may rest. The test is carried out asfollows:…
Electrical engineering
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