. Test of a delco lighting plant . f the generator asa motor. The losses which were calculated v:ere,armature copper loss, field loss, end. strayload loss. The stray losd loss v^bs taken fromthe stray load curve of the machine. The formula for the efficiency which 84 TEST OF A DELCO LIGHTIIsG PLAIT,v/as used was Eff. = Vull the of vjhich .ire given in the key onpage 56. Data Sheet lio. 1£. Sffieiency of Shunt Generator of Delco-light Plant,With Unbalanced r 1000 - 7 - V = Yolts. lisw. 4 8 12 16 20 24 .176 .552 .528 .705 .882 Va. 53,52
. Test of a delco lighting plant . f the generator asa motor. The losses which were calculated v:ere,armature copper loss, field loss, end. strayload loss. The stray losd loss v^bs taken fromthe stray load curve of the machine. The formula for the efficiency which 84 TEST OF A DELCO LIGHTIIsG PLAIT,v/as used was Eff. = Vull the of vjhich .ire given in the key onpage 56. Data Sheet lio. 1£. Sffieiency of Shunt Generator of Delco-light Plant,With Unbalanced r 1000 - 7 - V = Yolts. lisw. 4 8 12 16 20 24 .176 .552 .528 .705 .882 Va. 53,52 •^2*o£ If. .986 .980 .974 .969 .354 .58 la. i> la^a. 1. 2 3f!.37 1^0 182 • - Vala. 167 299 430 556 687 816 Input. 1165. Vail. 134 267 783 ilff. Uw. O Instruments - #1155 II - #2^098 If - fZOl,. 87 APPFHTylX. 68 TEST OF I DELCO lIGHTiasPL^ET. Bibliography. Calorimetry. A. Ba t es, Electricity for the Farm and Home,irank Koestner. Electricity on the Farm. Frederick Anderson. ng TE2T OF S: DSLGO LIGHIILG Calculation of Transmission Wire. To facilitate the calculation of thesize of wire needed for a Delco Light install-ation, the curves on page 90 were drawn. Inthis set of curves, the abscissae is the quo-tient of the current to be delivered by theplant, divided by the voltage drop permissablein transmission. The ordinates are the sizesof wire in B. & S. gauge. ^or suppose that the DelcoPlant is situcited £5 feot from the cenxer ofthe load, and it is required uo deliver 20amperes with a drop of only 1 volt. By goingup the £0 line till the E5 foot curve isreached and then going over to the scale ofordinates, it is seen that Eo. 10 B. & wire -aust be used. If the was 2-g- volts, the B line would befollo
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