How To Calculate The Power Of Capacitors - Alpes Technologies
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3How to calculate the power of capacitors
(continued)
CaPaCiTOr POwEr CalCulaTiON TaBlE
Conversion table
Based on the power of a receiver in kW, this table can be used to calculate the power of the capacitors to change
from an initial power factor to a required power factor. It also gives the equivalence between cos ø and tg ø .
Final power factor
Capacitor power in kVAr to be installed per kW of load to increase the power factor to:
cos ø
0.90
0.91
0.92
0.93
0.94
0.95
0.96
0.97
0.98
0.99
1
tg ø
0.48
0.46
0.43
0.40
0.36
0.33
0.29
0.25
0.20
0.14
0.0
0.40
2.29
1.805
1.832
1.861
1.895
1.924
1.959
1.998
2.037
2.085
2.146
2.288
0.41
2.22
1.742
1.769
1.798
1.831
1.840
1.896
1.935
1.973
2.021
2.082
2.225
0.42
2.16
1.681
1.709
1.738
1.771
1.800
1.836
1.874
1.913
1.961
2.002
2.164
0.43
2.10
1.624
1.651
1.680
1.713
1.742
1.778
1.816
1.855
1.903
1.964
2.107
0.44
2.04
1.558
1.585
1.614
1.647
1.677
1.712
1.751
1.790
1.837
1.899
2.041
0.45
1.98
1.501
1.532
1.561
1.592
1.626
1.659
1.695
1.737
1.784
1.846
1.988
0.46
1.93
1.446
1.473
1.502
1.533
1.567
1.600
1.636
1.677
1.725
1.786
1.929
0.47
1.88
1.397
1.425
1.454
1.485
1.519
1.532
1.588
1.629
1.677
1.758
1.881
0.48
1.83
1.343
1.730
1.400
1.430
1.464
1.467
1.534
1.575
1.623
1.684
1.826
0.49
1.78
1.297
1.326
1.355
1.386
1.420
1.453
1.489
1.530
1.578
1.639
1.782
0.50
1.73
1.248
1.276
1.303
1.337
1.369
1.403
1.441
1.481
1.529
1.590
1.732
0.51
1.69
1.202
1.230
1.257
1.291
1.323
1.357
1.395
1.435
1.483
1.544
1.686
0.52
1.64
1.160
1.188
1.215
1.249
1.281
1.315
1.353
1.393
1.441
1.502
1.644
0.53
1.60
1.116
1.144
1.171
1.205
1.237
1.271
1.309
1.349
1.397
1.458
1.600
0.54
1.56
1.075
1.103
1.130
1.164
1.196
1.230
1.268
1.308
1.356
1.417
1.559
0.55
1.52
1.035
1.063
1.090
1.124
1.156
1.190
1.228
1.268
1.316
1.377
1.519
0.56
1.48
0.996
1.024
1.051
1.085
1.117
1.151
1.189
1.229
1.277
1.338
1.480
0.57
1.44
0.958
0.986
1.013
1.047
1.079
1.113
1.151
1.191
1.239
1.300
1.442
0.58
1.40
0.921
0.949
0.976
1.010
1.042
1.073
1.114
1.154
1.202
1.263
1.405
0.59
1.37
0.884
0.912
0.939
0.973
1.005
1.039
1.077
1.117
1.165
1.226
1.368
0.60
1.33
0.849
0.878
0.905
0.939
0.971
1.005
1.043
1.083
1.131
1.192
1.334
0.61
1.30
0.815
0.843
0.870
0.904
0.936
0.970
1.008
1.048
1.096
1.157
1.299
0.62
1.27
0.781
0.809
0.836
0.870
0.902
0.936
0.974
1.014
1.062
1.123
1.265
0.63
1.23
0.749
0.777
0.804
0.838
0.870
0.904
0.942
0.982
1.030
1.091
1.233
0.64
1.20
0.716
0.744
0.771
0.805
0.837
0.871
0.909
0.949
0.997
1.058
1.200
0.65
1.17
0.685
0.713
0.740
0.774
0.806
0.840
0.878
0.918
0.966
1.007
1.169
0.66
1.14
0.654
0.682
0.709
0.743
0.775
0.809
0.847
0.887
0.935
0.996
1.138
0.67
1.11
0.624
0.652
0.679
0.713
0.745
0.779
0.817
0.857
0.905
0.966
1.108
0.68
1.08
0.595
0.623
0.650
0.684
0.716
0.750
0.788
0.828
0.876
0.937
1.079
0.69
1.05
0.565
0.593
0.620
0.654
0.686
0.720
0.758
0.798
0.840
0.907
1.049
0.70
1.02
0.536
0.564
0.591
0.625
0.657
0.691
0.729
0.796
0.811
0.878
1.020
0.71
0.99
0.508
0.536
0.563
0.597
0.629
0.663
0.701
0.741
0.783
0.850
0.992
0.72
0.96
0.479
0.507
0.534
0.568
0.600
0.634
0.672
0.721
0.754
0.821
0.963
0.73
0.94
0.452
0.480
0.507
0.541
0.573
0.607
0.645
0.685
0.727
0.794
0.936
0.74
0.91
0.425
0.453
0.480
0.514
0.546
0.580
0.618
0.658
0.700
0.767
0.909
0.75
0.88
0.398
0.426
0.453
0.487
0.519
0.553
0.591
0.631
0.673
0.740
0.882
0.76
0.86
0.371
0.399
0.426
0.460
0.492
0.526
0.564
0.604
0.652
0.713
0.855
0.77
0.83
0.345
0.373
0.400
0.434
0.466
0.500
0.538
0.578
0.620
0.687
0.829
0.78
0.80
0.319
0.347
0.374
0.408
0.440
0.474
0.512
0.552
0.594
0.661
0.803
0.79
0.78
0.292
0.320
0.347
0.381
0.413
0.447
0.485
0.525
0.567
0.634
0.776
0.80
0.75
0.266
0.294
0.321
0.355
0.387
0.421
0.459
0.499
0.541
0.608
0.750
0.81
0.72
0.240
0.268
0.295
0.329
0.361
0.395
0.433
0.473
0.515
0.582
0.724
0.82
0.70
0.214
0.242
0.269
0.303
0.335
0.369
0.407
0.447
0.489
0.556
0.698
0.83
0.67
0.188
0.216
0.243
0.277
0.309
0.343
0.381
0.421
0.463
0.530
0.672
0.84
0.65
0.162
0.190
0.217
0.251
0.283
0.317
0.355
0.395
0.437
0.504
0.645
0.85
0.62
0.136
0.164
0.191
0.225
0.257
0.291
0.329
0.369
0.417
0.478
0.602
0.86
0.59
0.109
0.140
0.167
0.198
0.230
0.264
0.301
0.343
0.390
0.450
0.593
0.87
0.57
0.083
0.114
0.141
0.172
0.204
0.238
0.275
0.317
0.364
0.424
0.567
0.88
0.54
0.054
0.085
0.112
0.143
0.175
0.209
0.246
0.288
0.335
0.395
0.538
0.89
0.51
0.028
0.059
0.086
0.117
0.149
0.183
0.230
0.262
0.309
0.369
0.512
0.90
0.48
0.031
0.058
0.089
0.121
0.155
0.192
0.234
0.281
0.341
0.484
Example: 200 kW motor - cos ø = 0.75 - required cos ø = 0.93 - Qc = 200 x 0.487 = 98 kVAr
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