Appendix A
CURRENT PROTECTION RELAY - IPR-D
Manual P/N: IPR-D GBM 01/09/2006
A.2
ANSI CURVES
ANSI CURVE CONSTANTS
A B C D E
Moderately Inverse
0.1735 0.6791 0.8
-0.08 0.1271 TRIP TIME (SEC)
T
Normally Inverse
0.0274 2.2614 0.3
-4.19 9.1272 CURVE MULTIPLIER SETPOINT
M
Very Inverse
0.0615 0.7989 0.34 -0.284 4.0505 INPUT CURRENT
I
Extremely Inverse
0.0399 0.2294 0.5 3.0094 0.7222 PICKUP CURRENT SETPOINT
Ipu
MULT. I/Ipu
(M)
1.0
1.5 2 3 4 5 6 7 8 9 10 15
20
ANSI - MODERATELY INVERSE
0.5 8.728 0.675 0.379 0.239 0.191 0.166 0.151 0.141 0.133 0.128 0.123 0.110 0.104
0.8 13.965 1.081 0.606 0.382 0.305 0.266 0.242 0.225 0.213 0.204 0.197 0.177 0.167
1 17.457 1.351 0.757 0.478 0.382 0.332 0.302 0.281 0.267 0.255 0.247 0.221 0.209
1.2 20.948 1.621 0.909 0.573 0.458 0.399 0.362 0.338 0.320 0.306 0.296 0.265 0.250
1.5 26.185 2.026 1.136 0.716 0.573 0.499 0.453 0.422 0.400 0.383 0.370 0.331 0.313
2 34.913 2.702 1.515 0.955 0.764 0.665 0.604 0.563 0.533 0.511 0.493 0.442 0.417
3 52.370 4.053 2.272 1.433 1.145 0.997 0.906 0.844 0.800 0.766 0.740 0.663 0.626
4 69.826 5.404 3.030 1.910 1.527 1.329 1.208 1.126 1.066 1.021 0.986 0.884 0.835
6 104.74 8.106 4.544 2.866 2.291 1.994 1.812 1.689 1.600 1.532 1.479 1.326 1.252
8 139.65
10.807 6.059 3.821 3.054 2.659 2.416 2.252 2.133 2.043 1.972 1.768 1.669
10 174.57
13.509 7.574 4.776 3.818 3.324 3.020 2.815 2.666 2.554 2.465 2.210 2.087
15 261.85
20.264 11.361
7.164 5.727 4.986 4.531 4.222 3.999 3.830 3.698 3.315 3.130
20 349.13
27.019 15.148
9.552 7.636 6.647 6.041 5.630 5.332 5.107 4.931 4.419 4.173
ANSI - NORMALLY INVERSE
0.5 10.659 2.142 0.883 0.377 0.256 0.203 0.172 0.151 0.135 0.123 0.113 0.082 0.066
0.8 17.054 3.427 1.412 0.603 0.410 0.325 0.276 0.242 0.216 0.197 0.181 0.132 0.106
1 21.317 4.284 1.766 0.754 0.513 0.407 0.344 0.302 0.270 0.246 0.226 0.165 0.133
1.2 25.580 5.141 2.119 0.905 0.615 0.488 0.413 0.362 0.324 0.295 0.271 0.198 0.159
1.5 31.976 6.426 2.648 1.131 0.769 0.610 0.517 0.453 0.406 0.369 0.339 0.247 0.199
2 42.634 8.568 3.531 1.508 1.025 0.814 0.689 0.604 0.541 0.492 0.452 0.329 0.265
3 63.951
12.853 5.297 2.262 1.538 1.220 1.033 0.906 0.811 0.738 0.678 0.494 0.398
4 85.268
17.137 7.062 3.016 2.051 1.627 1.378 1.208 1.082 0.983 0.904 0.659 0.530
6 127.90
25.705 10.594
4.524 3.076 2.441 2.067 1.812 1.622 1.475 1.356 0.988 0.796
8 170.54
34.274 14.125
6.031 4.102 3.254 2.756 2.415 2.163 1.967 1.808 1.318 1.061
10 213.17
42.842 17.656
7.539 5.127 4.068 3.445 3.019 2.704 2.458 2.260 1.647 1.326
15 319.76
64.263 26.484 11.309 7.691 6.102 5.167 4.529 4.056 3.688 3.390 2.471 1.989
20 426.34
85.684 35.312 15.078
10.254
8.136 6.889 6.039 5.408 4.917 4.520 3.294 2.652
ANSI - VERY INVERSE
0.5 7.354 1.567 0.663 0.268 0.171 0.130 0.108 0.094 0.085 0.078 0.073 0.058 0.051
0.8 11.767 2.507 1.060 0.430 0.273 0.208 0.173 0.151 0.136 0.125 0.117 0.093 0.082
1 14.709 3.134 1.325 0.537 0.341 0.260 0.216 0.189 0.170 0.156 0.146 0.116 0.102
1.2 17.651 3.761 1.590 0.644 0.409 0.312 0.259 0.227 0.204 0.187 0.175 0.139 0.122
1.5 22.063 4.701 1.988 0.805 0.512 0.390 0.324 0.283 0.255 0.234 0.218 0.174 0.153
2 29.418 6.268 2.650 1.074 0.682 0.520 0.432 0.378 0.340 0.312 0.291 0.232 0.204
3 44.127 9.402 3.976 1.611 1.024 0.780 0.648 0.566 0.510 0.469 0.437 0.348 0.306
4 58.835
12.537 5.301 2.148 1.365 1.040 0.864 0.755 0.680 0.625 0.583 0.464 0.408
6 88.253
18.805 7.951 3.221 2.047 1.559 1.297 1.133 1.020 0.937 0.874 0.696 0.612
8 117.67
25.073 10.602
4.295 2.730 2.079 1.729 1.510 1.360 1.250 1.165 0.928 0.815
10 147.09
31.341 13.252
5.369 3.412 2.599 2.161 1.888 1.700 1.562 1.457 1.160 1.019
15 220.63
47.012 19.878
8.054 5.118 3.898 3.242 2.831 2.550 2.343 2.185 1.739 1.529
20 294.18
62.683 26.504 10.738 6.824 5.198 4.322 3.775 3.399 3.124 2.913 2.319 2.039
ANSI - EXTREMELY INVERSE
0.5 9.157 2.000 0.872 0.330 0.184 0.124 0.093 0.075 0.063 0.055 0.049 0.035 0.030
0.8 14.651 3.201 1.395 0.528 0.294 0.198 0.148 0.119 0.101 0.088 0.079 0.056 0.048
1 18.314 4.001 1.744 0.659 0.368 0.247 0.185 0.149 0.126 0.110 0.098 0.070 0.060
1.2 21.977 4.801 2.093 0.791 0.442 0.297 0.223 0.179 0.151 0.132 0.118 0.084 0.072
1.5 27.471 6.001 2.616 0.989 0.552 0.371 0.278 0.224 0.189 0.165 0.147 0.105 0.090
2 36.628 8.002 3.489 1.319 0.736 0.495 0.371 0.298 0.251 0.219 0.196 0.141 0.119
3 54.942
12.003 5.233 1.978 1.104 0.742 0.556 0.447 0.377 0.329 0.295 0.211 0.179
4 73.256
16.004 6.977 2.638 1.472 0.990 0.742 0.596 0.503 0.439 0.393 0.281 0.239
6 109.88
24.005 10.466
3.956 2.208 1.484 1.113 0.894 0.754 0.658 0.589 0.422 0.358
8 146.51
32.007 13.955
5.275 2.944 1.979 1.483 1.192 1.006 0.878 0.786 0.562 0.477
10 183.14
40.009 17.443
6.594 3.680 2.474 1.854 1.491 1.257 1.097 0.982 0.703 0.597
15 274.71
60.014 26.165
9.891 5.519 3.711 2.782 2.236 1.885 1.646 1.474 1.054 0.895
20 366.28
80.018 34.887 13.188 7.359 4.948 3.709 2.981 2.514 2.194 1.965 1.405 1.194
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3
2
*
C
Ipu
I
E
C
Ipu
I
D
C
Ipu
I
B
A
M
T
Summary of Contents for IPR-D
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