Sheet1Effective: 1031 rev.2Automatic Capacitor Bank SizingSELECTING AN AUTOMATIC CAPACITOR SIZEExample: How much kVAR is required to correct an entire480V system to a 90% power factor when the peak kilowattThe following calculator is used to determine the capacitor kVARdemand month was 620kW at a 65% power factor?required to improve PF of a single load or entire power system.Actual power factor, peak kilowatt demand, desired PF andFormula: kVAR = kW x kW FACTORsystem voltage are required. The best source for this informationis the monthly utility bill or other local monitoring equipment. AFrom the kW FACTOR calculator below , the FACTORcalculation of each months data for a 12 month period isis 0.685recommended to determine the maximum kVAR required.Therefore: kVAR = 620 x .685 = 425Existing P.F (%)60Desired P.F. (%)95Load (kW)133Kilowatt Factor1.005Required kVAR134

VoltageVoltage18019

PF TableSchneider Canada Capacitor DivisionAutomatic Capacitor Bank SizingSELECTING AN AUTOMATIC CAPACITOR SIZEExample: How much kVAR is required to correct an entire480V system to a 90% power factor when the peak kilowattThe following table is used to determine the capacitor kVARdemand month was 620kW at a 65% power factor?required to improve PF of a single load or entire power system.Actual power factor, peak kilowatt demand and desired PF areUse the formula: kVAR = kW x kW FACTORrequired. The best source for this information is the monthlyutility bill or other local monitoring equipment. A calculation ofFrom the kW FACTOR Table below, find the FACTOReach months data for a 12 month period is recommended tothat applies to a system with an original PF of 65% anddetermine the maximum kVAR required.a desired PF of 90%. This FACTOR is read to be 0.685.Therefore: kVAR = 620 x .685 = 425kVARkW FACTOR TABLEDesired PF in Percent8081828384858687888990919293949596979899100500.9821.0081.0341.0601.0861.1121.1391.1651.1921.2201.2481.2761.3061.3371.3691.4031.4401.4811.5291.5901.732510.9370.9630.9891.0151.0411.0671.0931.1201.1471.1741.2021.2311.2611.2911.3241.3581.3951.4361.4841.5441.687520.8930.9190.9450.9710.9971.0231.0491.0761.1031.1301.1581.1871.2171.2471.2801.3141.3511.3921.4401.5001.643530.8500.8760.9020.9280.9540.9801.0071.0331.0601.0881.1161.1441.1741.2051.2371.2711.3081.3491.3971.4581.600540.8090.8350.8610.8870.9130.9390.9650.9921.0191.0461.0741.1031.1331.1631.1961.2301.2671.3081.3561.4161.559550.7680.7940.8200.8460.8730.8990.9250.9520.9791.0061.0341.0631.0921.1231.1561.1901.2271.2681.3151.3761.518560.7290.7550.7810.8070.8340.8600.8860.9130.9400.9670.9951.0241.0531.0841.1161.1511.1881.2291.2761.3371.479570.6910.7170.7430.7690.7960.8220.8480.8750.9020.9290.9570.9861.0151.0461.0791.1131.1501.1911.2381.2991.441580.6550.6810.7070.7330.7590.7850.8110.8380.8650.8920.9200.9490.9791.0091.0421.0761.1131.1541.2011.2621.405590.6180.6440.6700.6960.7230.7490.7750.8020.8290.8560.8840.9130.9420.9731.0061.0401.0771.1181.1651.2261.368600.5830.6090.6350.6610.6870.7140.7400.7670.7940.8210.8490.8780.9070.9380.9701.0051.0421.0831.1301.1911.333610.5490.5750.6010.6270.6530.6790.7060.7320.7590.7870.8150.8430.8730.9040.9360.9701.0071.0481.0961.1571.299620.5150.5410.5670.5930.6200.6460.6720.6990.7260.7530.7810.8100.8390.8700.9030.9370.9741.0151.0621.1231.265630.4830.5090.5350.5610.5870.6130.6390.6660.6930.7200.7480.7770.8070.8370.8700.9040.9410.9821.0301.0901.233640.4510.4770.5030.5290.5550.5810.6070.6340.6610.6880.7160.7450.7750.8050.8380.8720.9090.9500.9981.0581.201t650.4190.4450.4710.4970.5230.5490.5760.6020.6290.6570.6850.7140.7430.7740.8060.8400.8770.9190.9661.0271.169ne660.3880.4140.4400.4660.4920.5190.5450.5720.5990.6260.6540.6830.7120.7430.7750.8100.8470.8880.9350.9961.138c670.3580.3840.4100.4360.4620.4880.5150.5410.5680.5960.6240.6520.6820.7130.7450.7790.8160.8570.9050.9661.108r680.3280.3540.3800.4060.4320.4590.4850.5120.5390.5660.5940.6230.6520.6830.7150.7500.7870.8280.8750.9361.078e690.2990.3250.3510.3770.4030.4290.4560.4820.5090.5370.5650.5930.6230.6540.6860.7200.7570.7980.8460.9071.049P700.2700.2960.3220.3480.3740.4000.4270.4530.4800.5080.5360.5650.5940.6250.6570.6920.7290.7700.8170.8781.020n710.2420.2680.2940.3200.3460.3720.3980.4250.4520.4800.5080.5360.5660.5970.6290.6630.7000.7410.7890.8490.992i720.2140.2400.2660.2920.3180.3440.3700.3970.4240.4520.4800.5080.5380.5690.6010.6350.6720.7130.7610.8210.964730.1860.2120.2380.2640.2900.3160.3430.3700.3960.4240.4520.4810.5100.5410.5730.6080.6450.6860.7330.7940.936F740.1590.1850.2110.2370.2630.2890.3160.3420.3690.3970.4250.4530.4830.5140.5460.5800.6170.6580.7060.7660.909P750.1320.1580.1840.2100.2360.2620.2890.3150.3420.3700.3980.4260.4560.4870.5190.5530.5900.6310.6790.7390.882l760.1050.1310.1570.1830.2090.2350.2620.2880.3150.3430.3710.4000.4290.4600.4920.5260.5630.6050.6520.7130.855a770.0790.1050.1310.1570.1830.2090.2350.2620.2890.3160.3440.3730.4030.4330.4660.5000.5370.5780.6260.6860.829n780.0520.0780.1040.1300.1560.1830.2090.2360.2630.2900.3180.3470.3760.4070.4390.4740.5110.5520.5990.6600.802i790.0260.0520.0780.1040.1300.1560.1830.2090.2360.2640.2920.3200.3500.3810.4130.4470.4840.5250.5730.6340.776g800.0000.0260.0520.0780.1040.1300.1570.1830.2100.2380.2660.2940.3240.3550.3870.4210.4580.4990.5470.6080.750ir810.0000.0260.0520.0780.1040.1310.1570.1840.2120.2400.2680.2980.3290.3610.3950.4320.4730.5210.5810.724O820.0000.0260.0520.0780.1050.1310.1580.1860.2140.2420.2720.3030.3350.3690.4060.4470.4950.5560.698830.0000.0260.0520.0790.1050.1320.1600.1880.2160.2460.2770.3090.3430.3800.4210.4690.5300.672840.0000.0260.0530.0790.1060.1340.1620.1900.2200.2510.2830.3170.3540.3950.4430.5030.646850.0000.0260.0530.0800.1070.1350.1640.1940.2250.2570.2910.3280.3690.4170.4770.620860.0000.0270.0540.0810.1090.1380.1670.1980.2300.2650.3020.3430.3900.4510.593870.0000.0270.0540.0820.1110.1410.1720.2040.2380.2750.3160.3640.4240.567880.0000.0270.0550.0840.1140.1450.1770.2110.2480.2890.3370.3970.540890.0000.0280.0570.0860.1170.1490.1840.2210.2620.3090.3700.512900.0000.0290.0580.0890.1210.1560.1930.2340.2810.3420.484910.0000.0300.0600.0930.1270.1640.2050.2530.3130.456920.0000.0310.0630.0970.1340.1750.2230.2840.426930.0000.0320.0670.1040.1450.1920.2530.395940.0000.0340.0710.1120.1600.2200.363950.0000.0370.0780.1260.1860.329960.0000.0410.0890.1490.292970.0000.0480.1080.251980.0000.0610.203990.0000.1421000.000Custom pf Calculator:Existing:72Desired:87kW:1430Enter data in these boxes onlyFactor:0.40Req'd kVAR:568Old kVA:1986.1111111111New kVA:1643.67816091951430*0.397Old kVAR:1378.3095971802(to unity)

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