Electricians' operating and testing manual; (1910)
Horstmann, Henry C. [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] joint author · Chicago, F. H. Drake & co · leaf 275
res in the generator cir- Testing 273 cuit. Roughly the efficiency of the two is the load onthe dynamo divided by the power delivered to themotor. In order to obtain the efficiency of the generator,we must first have the efficiency of the motor. If thetwo machines are similar, either motors or… … Figure 168 single machines. Thus, if the efficiency of the two ma-chines is .81, the efficiency of either machine singlywill be .90. The efficiency of a motor may be tested by meansof the well known Prony brake shown in Figure 168.In this figure P is a pulley attached to the shaft ofthe motor. The…
Electrical engineering · Electric testing
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