International Library of Technology · Scranton, International Textbook Co. · leaf 87
o the armature,and when an alternating current is sent through c an alter-nating magnetization is set up through the armature coils. 72 OPERATION OF 10 This induces an E. M. F. in each coil; and if any short cir-cuits exist, such heavy local currents are set up that theshort-circuited coils soon… … Fig. 29. method of testing for such faults. To cut out a short-cir-cuited coil, temporarily disconnect its ends from the commu-tator and bend back the ends out of the way and tape themso that they cannot touch each other and put a short pieceof wire, or jumper, in place of the coil so…
Electrical engineering
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