The handbook of Technical irrigaTion informaTion - Hunter Industries

TablesPumpHorsePowerAverage KilowattHour InputSinglePhaseThreePhaseSinglePhaseApproximate Cost of Pump OperationApproximate Cost of Operation per Hour at Kilowatt Hr. Rate of:$.0150 $.0200 $ .0250 $ .0400 $.0500 $.0600 $.0800 $.1000 $.1200ThreePhaseSinglePhaseThreePhaseSinglePhaseThreePhaseSinglePhaseThreePhase¼ 0.305 0.0046 0.0062 0.0078 0.0122 0.0153 0.0183 0.0244 0.0305 0.0366¹⁄₃ 0.408 0.0062 0.0082 0.0103 0.0163 0.0204 0.0245 0.0326 0.0408 0.0490½ 0.535 0.520 0.0081 0.0078 0.0108 0.0104 0.0135 0.0130 0.0214 0.0208 0.0268 0.0260 0.0321 0.0312 0.0428 0.0416 0.0535 0.0520 0.0642 0.0642¾ 0.760 0.768 0.0114 0.0116 0.0152 0.0154 0.0190 0.0193 0.0304 0.0307 0.0380 0.0384 0.0456 0.0461 0.0608 0.0614 0.0760 0.0768 0.0912 0.09221 1.000 0.960 0.0150 0.0144 0.0200 0.0192 0.0250 0.0240 0.0400 0.0384 0.0500 0.0480 0.0600 0.0576 0.0800 0.0768 0.1000 0.0960 0.1200 0.11521½ 1.500 1.42 0.0225 0.0213 0.0300 0.0284 0.0375 0.0335 0.0600 0.0568 0.0750 0.0710 0.0900 0.0852 0.1200 0.1136 0.1500 0.1420 0.1800 0.17042 1.980 1.83 0.0297 0.0275 0.0396 0.0366 0.0495 0.0458 0.0792 0.0732 0.0990 0.0915 0.1188 0.1098 0.1584 0.1464 0.1980 0.1830 0.2376 0.21963 2.95 2.70 0.0443 0.0405 0.0590 0.0540 0.0738 0.0675 0.1180 0.1080 0.1475 0.1350 0.1770 0.1620 0.2360 0.2160 0.2950 0.2700 0.3540 0.32405 4.65 4.50 0.0698 0.0675 0.0930 0.0900 0.1163 0.1125 0.1860 0.1800 0.2325 0.2250 0.2790 0.2700 0.3720 0.3600 0.4650 0.4500 0.5580 0.54007½ 6.9 6.75 0.1035 0.1013 0.1380 0.1350 0.1725 0.1688 0.2760 0.2700 0.3450 0.3375 0.4140 0.4050 0.5520 0.5400 0.6900 0.6750 0.8280 0.810010 9.3 9.0 0.1395 0.1350 0.1860 0.1800 0.2325 0.2250 0.3720 0.3600 0.4650 0.4500 0.5580 0.5400 0.7440 0.7200 0.9300 0.9000 1.1160 1.080015 12.8 0.1920 0.2560 0.3200 0.5120 0.6400 0.7680 1.0240 1.2800 1.536020 16.9 0.2535 0.3380 0.4225 0.6760 0.8450 1.0140 1.3520 1.6900 2.028025 20.8 0.3120 0.4160 0.5200 0.8320 1.0400 1.2480 1.6640 2.0800 2.496030 25.0 0.3750 0.5000 0.6250 1.0000 1.2500 1.5000 2.0000 2.5000 3.000040 33.2 0.4980 0.6640 0.8300 1.3280 1.6600 1.9920 2.6560 3.3200 3.984050 41.3 0.6195 0.8260 1.0325 1.6520 2.0650 2.4780 3.3040 4.1300 4.956060 49.5 0.7425 0.9900 1.2375 1.9800 2.4750 2.9700 3.9600 4.9500 5.940075 61.5 0.9225 1.2300 1.5375 2.4600 3.0750 3.6900 4.9200 6.1500 7.3800100 81.5 1.225 1.6300 2.0375 3.2600 4.0750 4.8900 6.5200 8.1500 9.7800SinglePhaseThreePhaseSinglePhaseThreePhaseSinglePhaseThreePhaseSinglePhaseThreePhaseSinglePhaseThreePhaseNote:To calculate approximate cost of operation at a cost factor not listed above, multiply the second columnrate of $.02 per KWH by the actual rate in effect, and then divide by 2.Example:the cost of operating a 3 hp single phase pump at a rate of $0.07 per KWH would be.0590 x 7 ÷ 2 = $0.2065 per hourThese charts are based upon 100% motor efficiencies.To determine actual cost factors, divide by actual pump and motor efficiency, as indicated above.61