UFC 3 -520-01
June 10, 2002
C-2.3
Look-up tables are often used to perform the above calcula tion. Table C-1
shows a typical table.
EXAMPLE: The previous example determined the required capacitor size for an
active power of 33.7 kW with a power factor of 0.65 to obtain a desired power
factor is 0.95. Using Table C -1, the applicable correcti on factor is 0.84 and the
required capacitor size is:
33.7 kW x 0.84 = 28.3 kVAR.
Table C -1. Correction Factors for Capacitor Sizing
Original
Desired Power Factor
Power
0.86
0.87
0.88
0.89
0.90
0.91
0.92
0.93
Factor
0.50
1.139
1.165
1.192
1.220
1.248
1.276
1.303
1.337
0.51
1.093
1.119
1.146
1.174
1.202
1.230
1.257
1.291
0.52
1.051
1.077
1.104
1.132
1.160
1.188
1.215
1.249
0.53
1.007
1.033
1.060
1.088
1.116
1.144
1.171
1.205
0.54
0.966
0.992
1.019
1.047
1.075
1.103
1.130
1.164
0.55
0.926
0.952
0.979
1.007
1.035
1.063
1.090
1.124
0.56
0.887
0.913
0.940
0.968
0.996
1.024
1.051
1.085
0.57
0.849
0.875
0.902
0.930
0.958
0.986
1.013
1.047
0.58
0.812
0.838
0.865
0.893
0.921
0.949
0.976
1.010
0.59
0.775
0.801
0.828
0.856
0.884
0.912
0.939
0.973
0.60
0.741
0.767
0.794
0.822
0.849
0.878
0.905
0.939
0.61
0.706
0.732
0.759
0.787
0.815
0.843
0.870
0.904
0.62
0.672
0.698
0.725
0.753
0.781
0.809
0.836
0.870
0.63
0.640
0.666
0.693
0.721
0.749
0.777
0.804
0.838
0.64
0.607
0.633
0.660
0.688
0.716
0.744
0.771
0.805
0.65
0.576
0.602
0.629
0.657
0.685
0.713
0.740
0.774
0.66
0.545
0.571
0.598
0.626
0.654
0.682
0.709
0.743
0.67
0.515
0.541
0.568
0.596
0.624
0.652
0.679
0.713
0.68
0.486
0.512
0.539
0.567
0.595
0.623
0.650
0.684
0.69
0.456
0.482
0.509
0.537
0.565
0.593
0.620
0.654
0.70
0.427
0.453
0.480
0.508
0.536
0.564
0.591
0.625
0.71
0.399
0.425
0.452
0.480
0.508
0.536
0.563
0.597
0.72
0.370
0.396
0.423
0.451
0.479
0.507
0.534
0.568
0.73
0.343
0.369
0.396
0.424
0.452
0.480
0.507
0.541
0.74
0.316
0.342
0.369
0.397
0.425
0.453
0.480
0.514
0.75
0.289
0.315
0.342
0.370
0.398
0.426
0.453
0.487
0.76
0.262
0.288
0.315
0.343
0.371
0.399
0.426
0.460
0.77
0.236
0.262
0.289
0.317
0.345
0.373
0.400
0.434
0.78
0.210
0.236
0.263
0.291
0.319
0.347
0.374
0.408
0.79
0.183
0.209
0.236
0.264
0.292
0.320
0.347
0.381
0.80
0.157
0.183
0.210
0.238
0.266
0.294
0.321
0.355
0.81
0.131
0.157
0.184
0.212
0.240
0.268
0.295
0.329
0.82
0.105
0.131
0.158
0.186
0.214
0.242
0.269
0.303
0.83
0.079
0.105
0.132
0.160
0.188
0.216
0.243
0.277
0.84
0.053
0.079
0.106
0.134
0.162
0.190
0.217
0.251
0.85
0.027
0.053
0.080
0.108
0.136
0.164
0.191
0.225
C-3
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