CURVE INFORMATION AND TABLES
7-32
Curve: IEC A
Curve #: 1 2 3 4 5678910111213141516
x P/U Time to trip (seconds)
1.03 11.872 23.745 35.234 47.489 60.681 72.817 84.019 91.021 109.225 121.361 136.531 136.531 156.036 156.036 182.042 182.042
1.10 3.665 7.331 11.033 14.760 18.204 21.845 25.401 29.520 33.098 36.408 40.454 43.690 47.489 52.012 54.613 57.487
1.20 1.916 3.832 5.749 7.638 9.581 11.497 13.485 15.384 17.337 19.162 21.005 22.755 24.824 26.640 28.743 30.340
1.30 1.330 2.664 3.986 5.328 6.660 7.973 9.335 10.604 12.003 13.320 14.563 16.063 17.337 18.513 19.859 21.417
1.40 1.036 2.073 3.112 4.153 5.177 6.206 7.233 8.275 9.335 10.402 11.378 12.412 13.485 14.563 15.604 16.549
1.50 0.860 1.720 2.582 3.435 4.300 5.152 6.035 6.869 7.746 8.600 9.498 10.304 11.145 12.003 12.850 13.826
1.60 0.741 1.482 2.225 2.968 3.703 4.440 5.177 5.936 6.660 7.430 8.151 8.880 9.666 10.402 11.145 11.872
1.70 0.656 1.313 1.968 2.626 3.280 3.943 4.589 5.251 5.904 6.580 7.233 7.858 8.533 9.179 9.840 10.502
1.80 0.592 1.183 1.776 2.369 2.960 3.546 4.137 4.728 5.328 5.904 6.501 7.093 7.692 8.275 8.880 9.498
1.90 0.542 1.084 1.625 2.167 2.710 3.251 3.793 4.334 4.876 5.407 5.969 6.501 7.047 7.585 8.151 8.669
2.00 0.501 1.003 1.504 2.004 2.505 3.009 3.512 4.016 4.513 5.010 5.516 6.001 6.501 7.002 7.533 8.031
2.10 0.468 0.937 1.404 1.873 2.339 2.808 3.280 3.741 4.217 4.688 5.152 5.630 6.102 6.540 7.002 7.481
2.20 0.440 0.881 1.321 1.762 2.202 2.645 3.085 3.523 3.957 4.404 4.854 5.277 5.719 6.171 6.620 7.047
2.30 0.417 0.833 1.250 1.668 2.084 2.499 2.920 3.330 3.753 4.169 4.589 5.010 5.407 5.841 6.241 6.660
2.40 0.396 0.793 1.189 1.585 1.982 2.380 2.772 3.166 3.569 3.957 4.352 4.749 5.152 5.544 5.936 6.350
2.50 0.378 0.757 1.135 1.515 1.893 2.271 2.651 3.026 3.403 3.779 4.169 4.551 4.920 5.302 5.689 6.068
2.60 0.363 0.726 1.088 1.451 1.814 2.176 2.540 2.905 3.260 3.629 3.986 4.352 4.708 5.080 5.434 5.810
2.70 0.349 0.698 1.046 1.395 1.745 2.092 2.444 2.793 3.139 3.490 3.832 4.185 4.532 4.876 5.226 5.573
2.80 0.336 0.673 1.009 1.345 1.683 2.019 2.354 2.690 3.026 3.361 3.703 4.030 4.369 4.708 5.057 5.381
2.90 0.325 0.651 0.976 1.300 1.625 1.950 2.276 2.601 2.928 3.251 3.581 3.901 4.234 4.551 4.876 5.201
3.00 0.315 0.630 0.946 1.260 1.576 1.890 2.207 2.523 2.837 3.148 3.467 3.779 4.091 4.404 4.728 5.033
3.10 0.306 0.612 0.918 1.223 1.530 1.836 2.142 2.449 2.751 3.060 3.361 3.665 3.972 4.283 4.589 4.898
3.20 0.297 0.595 0.892 1.190 1.488 1.785 2.080 2.380 2.677 2.976 3.270 3.569 3.873 4.169 4.458 4.749
3.30 0.290 0.579 0.869 1.158 1.449 1.739 2.026 2.319 2.607 2.897 3.184 3.479 3.766 4.060 4.352 4.628
3.40 0.283 0.565 0.847 1.130 1.413 1.696 1.979 2.261 2.540 2.822 3.112 3.392 3.678 3.957 4.234 4.513
3.50 0.276 0.552 0.827 1.103 1.379 1.655 1.930 2.207 2.482 2.758 3.034 3.310 3.581 3.860 4.137 4.422
3.60 0.270 0.539 0.809 1.079 1.348 1.618 1.890 2.159 2.427 2.697 2.968 3.241 3.512 3.779 4.045 4.317
3.70 0.264 0.528 0.792 1.056 1.321 1.585 1.848 2.113 2.374 2.638 2.905 3.166 3.435 3.703 3.957 4.217
3.80 0.259 0.517 0.776 1.034 1.294 1.551 1.811 2.069 2.329 2.588 2.844 3.103 3.361 3.617 3.887 4.137
3.90 0.254 0.507 0.761 1.015 1.269 1.521 1.776 2.030 2.285 2.534 2.793 3.042 3.300 3.546 3.806 4.060
4.00 0.249 0.498 0.747 0.996 1.245 1.494 1.742 1.993 2.243 2.488 2.737 2.984 3.241 3.490 3.741 3.986
4.10 0.245 0.489 0.734 0.978 1.223 1.468 1.712 1.957 2.202 2.444 2.690 2.936 3.175 3.424 3.665 3.915
4.20 0.240 0.481 0.721 0.961 1.202 1.443 1.683 1.923 2.163 2.406 2.645 2.882 3.130 3.361 3.605 3.846
4.30 0.236 0.473 0.709 0.946 1.182 1.419 1.655 1.893 2.129 2.364 2.601 2.837 3.077 3.310 3.546 3.779
4.40 0.233 0.466 0.698 0.931 1.163 1.397 1.630 1.861 2.096 2.329 2.558 2.793 3.026 3.260 3.490 3.728
4.50 0.229 0.458 0.688 0.917 1.146 1.376 1.604 1.833 2.065 2.290 2.523 2.751 2.976 3.213 3.435 3.665
4.60 0.226 0.452 0.678 0.903 1.130 1.355 1.581 1.808 2.034 2.257 2.482 2.710 2.936 3.166 3.392 3.617
4.70 0.223 0.445 0.668 0.891 1.113 1.335 1.558 1.782 2.004 2.225 2.449 2.671 2.897 3.121 3.340 3.558
4.80 0.220 0.439 0.659 0.879 1.098 1.318 1.538 1.756 1.975 2.198 2.416 2.638 2.852 3.077 3.290 3.512
4.90 0.217 0.433 0.650 0.867 1.084 1.300 1.517 1.734 1.950 2.167 2.385 2.601 2.815 3.034 3.251 3.467
5.00 0.214 0.428 0.642 0.856 1.070 1.283 1.498 1.712 1.926 2.142 2.354 2.570 2.779 2.992 3.213 3.424
5.10 0.211 0.423 0.634 0.845 1.056 1.269 1.480 1.691 1.903 2.113 2.324 2.534 2.744 2.960 3.166 3.382
5.20 0.209 0.418 0.626 0.835 1.044 1.253 1.462 1.670 1.880 2.088 2.295 2.505 2.717 2.920 3.130 3.340
5.30 0.206 0.413 0.619 0.826 1.032 1.238 1.445 1.650 1.858 2.065 2.271 2.477 2.684 2.890 3.094 3.300
5.40 0.204 0.408 0.612 0.816 1.020 1.224 1.428 1.633 1.836 2.042 2.243 2.449 2.651 2.859 3.060 3.260
5.50 0.202 0.404 0.605 0.807 1.009 1.211 1.413 1.616 1.817 2.019 2.220 2.422 2.626 2.822 3.026 3.232
5.60 0.200 0.399 0.599 0.799 0.998 1.198 1.399 1.597 1.796 1.997 2.198 2.395 2.594 2.793 2.992 3.194
5.70 0.198 0.395 0.593 0.790 0.988 1.186 1.383 1.581 1.779 1.975 2.176 2.369 2.570 2.765 2.968 3.166
5.80 0.196 0.391 0.587 0.782 0.978 1.173 1.369 1.565 1.762 1.957 2.150 2.349 2.546 2.737 2.936 3.130
5.90 0.194 0.387 0.581 0.775 0.968 1.162 1.355 1.549 1.742 1.937 2.129 2.324 2.517 2.710 2.905 3.103
6.00 0.192 0.384 0.575 0.768 0.959 1.151 1.343 1.534 1.726 1.920 2.109 2.304 2.494 2.684 2.874 3.068
6.50 0.184 0.367 0.551 0.734 0.918 1.101 1.285 1.468 1.652 1.836 2.019 2.202 2.385 2.570 2.751 2.936
7.00 0.176 0.353 0.529 0.706 0.882 1.058 1.234 1.411 1.588 1.765 1.940 2.117 2.295 2.471 2.645 2.822
7.50 0.170 0.340 0.511 0.681 0.851 1.022 1.191 1.362 1.532 1.701 1.873 2.042 2.211 2.385 2.552 2.724
8.00 0.165 0.330 0.494 0.659 0.824 0.989 1.153 1.319 1.484 1.647 1.814 1.979 2.142 2.309 2.471 2.638
8.50 0.160 0.320 0.480 0.640 0.800 0.961 1.120 1.280 1.441 1.602 1.762 1.920 2.080 2.243 2.401 2.564
9.00 0.156 0.312 0.467 0.623 0.779 0.935 1.091 1.247 1.402 1.558 1.715 1.870 2.026 2.180 2.339 2.494
9.50 0.152 0.304 0.456 0.608 0.760 0.912 1.064 1.216 1.369 1.519 1.673 1.823 1.975 2.129 2.280 2.433
10.00 0.149 0.297 0.446 0.594 0.743 0.891 1.039 1.189 1.337 1.486 1.633 1.782 1.930 2.080 2.229 2.374
10.50 0.145 0.291 0.436 0.582 0.727 0.872 1.018 1.163 1.308 1.454 1.599 1.745 1.890 2.034 2.180 2.324
11.00 0.142 0.285 0.427 0.570 0.712 0.855 0.997 1.140 1.282 1.424 1.567 1.709 1.851 1.993 2.137 2.280
11.50 0.140 0.280 0.419 0.559 0.699 0.839 0.979 1.119 1.258 1.399 1.538 1.678 1.817 1.957 2.096 2.238
12.00 0.137 0.275 0.412 0.549 0.687 0.824 0.961 1.099 1.237 1.374 1.511 1.647 1.785 1.923 2.061 2.198
12.50 0.135 0.270 0.405 0.540 0.675 0.811 0.946 1.080 1.216 1.352 1.486 1.621 1.756 1.893 2.026 2.163
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