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Calculating capacitor size requirements

Existing Power FACTOR DESIRED  POWER FACTOR
0.80 0.86 0.90 0.92 0.93 0.94 0.95 0.96 0.97 0.98 0.99 1.00
0.45 1.230 1.384 1.501 1.532 1.592 1.626 1.695 1.695 1.737 1.784 1.846 1.988
0.46 1.179 1.330 1.446 1.473 1.533 1.657 1.600 1.636 1.677 1.725 1.786 1.929
0.47 1.130 1.278 1.397 1.425 1.485 1.519 1.532 1.588 1.629 1.677 1.758 1.881
0.48 1.076 1.228 1.343 1.370 1.430 1.164 1.497 1.534 1.575 1.623 1.684 1.826
0.49 1.030 1.179 1.297 1.326 1.386 1.420 1.453 1.489 1.530 1.578 1.639 1.782
0.50 0.982 1.132 1.248 1.276 1.337 1.369 1.403 1.141 1.481 1.529 1.590 1.732
0.51 0.936 1.087 1.202 1.230 1.291 1.323 1.357 1.395 1.435 1.483 1.544 1.686
0.52 0.894 1.043 1.160 1.188 1.249 1.281 1.315 1.353 1.393 1.441 1.002 1.644
0.53 0.850 1.000 1.116 1.144 1.205 1.237 1.271 1.309 1.349 1.397 1.458 1.600
0.54 0.809 0.959 1.075 1.103 1.164 1.196 1.230 1.268 1.308 1.356 1.147 1.559
0.55 0.769 0.918 1.035 1.063 1.124 1.156 1.190 1.228 1.268 1.316 1.377 1.519
0.56 0.730 0.879 0.996 1.024 1.085 1.117 1.151 1.189 1.229 1.277 1.338 1.480
0.57 0.692 0.841 0.958 0.986 1.047 1.079 1.113 1.151 1.191 1.239 1.300 1.442
0.58 0.665 0.805 0.921 0.949 1.010 1.042 1.076 1.114 1.154 1.202 1.263 1.405
0.59 0.618 0.768 0.884 0.912 0.973 1.005 1.039 1.077 1.117 1.165 1.226 1.368
0.60 0.584 0.733 0.849 0.878 0.939 0.971 1.005 1.043 1.083 1.131 1.192 1.334
0.61 0.549 0.699 0.815 0.843 0.904 0.936 0.970 1.008 1.048 1.096 1.157 1.299
0.62 0.515 0.655 0.781 0.809 0.870 0.902 0.936 0.974 1.014 1.062 1.123 1.265
0.63 0.483 0.633 0.749 0.777 0.838 0.870 0.904 0.942 0.982 1.030 1.091 1.233
0.64 0.450 0.601 0.716 0.744 0.805 0.837 0.871 0.909 0.949 0.997 1.058 1.200
0.65 0.419 0.569 0.685 0.713 0.744 0.806 0.840 0.878 0.918 0.966 1.007 1.169
0.66 0.388 0.538 0.654 0.682 0.743 0.775 0.809 0.847 0.887 0.935 0.996 1.138
0.67 0.358 0.508 0.624 0.652 0.713 0.745 0.779 0.817 0.857 0.905 0.966 1.108
0.68 0.329 0.478 0.595 0.623 0.684 0.716 0.750 0.788 0.828 0.876 0.937 1.079
0.69 0.299 0.449 0.565 0.593 0.654 0.686 0.720 0.758 0.798 0.840 0.907 1.049
0.70 0.270 0.420 0.536 0.564 0.625 0.657 0.691 0.729 0.769 0.811 0.878 1.020
0.71 0.242 0.392 0.508 0.536 0.597 0.629 0.663 0.701 0.741 0.783 0.850 0.992
0.72 0.213 0.364 0.479 0.507 0.568 0.600 0.634 0.672 0.712 0.754 0.821 0.963
0.73 0.186 0.336 0.452 0.480 0.541 0.573 0.607 0.645 0.685 0.727 0.794 0.936
0.74 0.159 0.309 0.425 0.453 0.514 0.546 0.580 0.618 0.658 0.700 0.767 0.909
0.75 0.132 0.282 0.398 0.426 0.487 0.519 0.553 0.591 0.631 0.673 0.740 0.882
0.76 0.105 0.255 0.371 0.399 0.460 0.492 0.526 0.564 0.604 0.652 0.713 0.855
0.77 0.079 0.229 0.345 0.373 0.434 0.466 0.500 0.538 0.578 0.620 0.687 0.829
0.78 0.053 0.202 0.319 0.347 0.408 0.440 0.474 0.512 0.552 0.594 0.661 0.803
0.79 0.026 0.176 0.292 0.320 0.381 0.413 0.447 0.485 0.525 0.567 0.634 0.776
0.80 — 0.150 0.266 0.294 0.355 0.387 0.421 0.459 0.499 0.541 0.608 0.750
0.81 — 0.124 0.240 0.268 0.329 0.361 0.395 0.433 0.473 0.515 0.582 0.724
0.82 — 0.098 0.214 0.242 0.303 0.335 0.369 0.407 0.447 0.489 0.556 0.689
0.83 — 0.072 0.188 0.216 0.277 0.309 0.343 0.381 0.421 0.463 0.530 0.672
0.84 — 0.046 0.162 0.190 0.251 0.283 0.317 0.355 0.395 0.437 0.504 0.645
0.85 — 0.020 0.136 0.164 0.225 0.257 0.291 0.329 0.369 0.417 0.478 0.620
0.86 — — 0.109 0.140 0.198 0.230 0.264 0.301 0.343 0.390 0.450 0.593
0.87 — — 0.083 0.114 0.172 0.204 0.238 0.275 0.317 0.364 0.424 0.567
0.88 — — 0.054 0.085 0.143 0.175 0.209 0.246 0.288 0.335 0.395 0.538
0.89 — — 0.028 0.590 0.117 0.149 0.183 0.230 0.262 0.309 0.369 0.512
0.90 — — — 0.030 0.089 0.121 0.155 0.192 0.234 0.281 0.341 0.484
0.91 — — — — 0.060 0.093 0.127 0.164 0.205 0.253 0.313 0.456
0.92 — — — — 0.031 0.063 0.097 0.134 0.175 0.223 0.284 0.426
0.93 — — — — — 0.032 0.067 0.104 0.145 0.192 0.253 0.395
0.94 — — — — — — 0.034 0.071 0.112 0.160 0.220 0.363
0.95 — — — — — — — 0.037 0.078 0.126 0.186 0.329
0.96 — — — — — — — — 0.041 0.089 0.149 0.292
0.97 — — — — — — — — — 0.048 0.108 0.251
0.98 — — — — — — — — — — 0.061 0.203
0.99 — — — — — — — — — — — 0.142

Example:

Total Load power = 200kW, Existing power factor = 0.70, Desired power factor = 0.95

It is required a power factor capacitor of 200 x 0.691 = 138 kvar.

If Power Factor is installed based on the above example the Reduction Power will be 27%

200 KW at 0.70 PF = 286 KVA         200 KW at 0.95 PF = 211KVA      Saving of power in KVA 27%