International Library of Technology · Scranton, International Textbook Co. · leaf 53
track at the point c is to be 500 volts, andthe loss in the feeder is to be 10 per cent, of the voltage at the car whena current of 60 amperes is being supplied. The current returns throughthe track, and we will suppose in this case that the resistance of thereturn circuit is negligible. Required… … Fig. 12. taken as zero; hence, the length L used in the formula will be f mile,or 3,960 feet, and not twice this distance, as in the previous examples.The drop in voltage will be 500 X 10 100 = 50, and since the current is 60 amperes, we have . 10.8 X 3,960 X 60 QQ0 . ■ A = =^ = 51,322 circular…
Electrical engineering
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