GE 735

5-24 735/737 Feeder Protection Relay
GE Power Management
5.5 IEC CURVES 5 OVERCURRENT CURVES
5
5.5.3 IEC B CURVES
The trip time is given by:
where: T = trip time (in seconds) K = 13.500 (curve shape constant)
S = curve shift multiplier E = 1.000 (curve shape constant)
M = 735/737 curve multiplier setpoint
I = input current (in amps)
Ipu = pickup current setpoint
S MULT CURRENT (per unit I /I
0
)– values below calculated using the IEC M value
735 IEC 1.05 1.50 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 15.00 20.00
1 1 0.1 27.001 2.700 1.350 0.675 0.449 0.337 0.269 0.225 0.192 0.168 0.150 0.096 0.071
2 0.2 54.002 5.401 2.701 1.349 0.899 0.674 0.539 0.449 0.385 0.337 0.299 0.193 0.143
3 0.3 81.002 8.101 4.051 2.024 1.348 1.011 0.808 0.674 0.577 0.505 0.449 0.289 0.214
4 0.4 ##### 10.801 5.401 2.699 1.798 1.348 1.078 0.898 0.770 0.674 0.599 0.386 0.285
5 0.5 ##### 13.502 6.751 3.374 2.247 1.685 1.347 1.123 0.962 0.842 0.749 0.482 0.356
6 0.6 ##### 16.202 8.102 4.048 2.697 2.022 1.617 1.347 1.155 1.010 0.898 0.579 0.428
7 0.7 ##### 18.903 9.452 4.723 3.146 2.359 1.886 1.572 1.347 1.179 1.048 0.675 0.499
8 0.8 ##### 21.603 10.802 5.398 3.596 2.696 2.156 1.796 1.540 1.347 1.198 0.772 0.570
9 0.9 ##### 24.303 12.152 6.073 4.045 3.032 2.425 2.021 1.732 1.516 1.348 0.868 0.641
10 1.0 ##### 27.004 13.503 6.747 4.495 3.369 2.695 2.245 1.924 1.684 1.497 0.964 0.713
0.5 1 0.1 13.500 1.350 0.675 0.337 0.225 0.168 0.135 0.112 0.096 0.084 0.075 0.048 0.036
2 0.2 27.001 2.700 1.350 0.675 0.449 0.337 0.269 0.225 0.192 0.168 0.150 0.096 0.071
3 0.3 40.501 4.051 2.025 1.012 0.674 0.505 0.404 0.337 0.289 0.253 0.225 0.145 0.107
4 0.4 54.002 5.401 2.701 1.349 0.899 0.674 0.539 0.449 0.385 0.337 0.299 0.193 0.143
5 0.5 67.502 6.751 3.376 1.687 1.124 0.842 0.674 0.561 0.481 0.421 0.374 0.241 0.178
6 0.6 81.002 8.101 4.051 2.024 1.348 1.011 0.808 0.674 0.577 0.505 0.449 0.289 0.214
7 0.7 94.503 9.451 4.726 2.362 1.573 1.179 0.943 0.786 0.674 0.589 0.524 0.338 0.249
8 0.8 ##### 10.801 5.401 2.699 1.798 1.348 1.078 0.898 0.770 0.674 0.599 0.386 0.285
9 0.9 ##### 12.152 6.076 3.036 2.023 1.516 1.213 1.010 0.866 0.758 0.674 0.434 0.321
10 1.0 ##### 13.502 6.751 3.374 2.247 1.685 1.347 1.123 0.962 0.842 0.749 0.482 0.356
0.8 1 0.1 21.601 2.160 1.080 0.540 0.360 0.270 0.216 0.180 0.154 0.135 0.120 0.077 0.057
2 0.2 43.201 4.321 2.160 1.080 0.719 0.539 0.431 0.359 0.308 0.269 0.240 0.154 0.114
3 0.3 64.802 6.481 3.241 1.619 1.079 0.809 0.647 0.539 0.462 0.404 0.359 0.231 0.171
4 0.4 86.403 8.641 4.321 2.159 1.438 1.078 0.862 0.718 0.616 0.539 0.479 0.309 0.228
5 0.5 ##### 10.801 5.401 2.699 1.798 1.348 1.078 0.898 0.770 0.674 0.599 0.386 0.285
6 0.6 ##### 12.962 6.481 3.239 2.158 1.617 1.293 1.078 0.924 0.808 0.719 0.463 0.342
7 0.7 ##### 15.122 7.561 3.778 2.517 1.887 1.509 1.257 1.078 0.943 0.839 0.540 0.399
8 0.8 ##### 17.282 8.642 4.318 2.877 2.156 1.725 1.437 1.232 1.078 0.958 0.617 0.456
9 0.9 ##### 19.443 9.722 4.858 3.236 2.426 1.940 1.617 1.386 1.213 1.078 0.694 0.513
10 1.0 ##### 21.603 10.802 5.398 3.596 2.696 2.156 1.796 1.540 1.347 1.198 0.772 0.570
1.1 1 0.1 29.701 2.970 1.485 0.742 0.494 0.371 0.296 0.247 0.212 0.185 0.165 0.106 0.078
2 0.2 59.402 5.941 2.971 1.484 0.989 0.741 0.593 0.494 0.423 0.371 0.329 0.212 0.157
3 0.3 89.103 8.911 4.456 2.227 1.483 1.112 0.889 0.741 0.635 0.556 0.494 0.318 0.235
4 0.4 ##### 11.882 5.941 2.969 1.978 1.483 1.186 0.988 0.847 0.741 0.659 0.424 0.314
5 0.5 ##### 14.852 7.426 3.711 2.472 1.853 1.482 1.235 1.058 0.926 0.824 0.530 0.392
6 0.6 ##### 17.822 8.912 4.453 2.967 2.224 1.778 1.482 1.270 1.112 0.988 0.637 0.470
7 0.7 ##### 20.793 10.397 5.195 3.461 2.594 2.075 1.729 1.482 1.297 1.153 0.743 0.549
8 0.8 ##### 23.763 11.882 5.938 3.956 2.965 2.371 1.976 1.694 1.482 1.318 0.849 0.627
9 0.9 ##### 26.734 13.368 6.680 4.450 3.336 2.668 2.223 1.905 1.667 1.482 0.955 0.705
10 1.0 ##### 29.704 14.853 7.422 4.944 3.706 2.964 2.470 2.117 1.853 1.647 1.061 0.784
TSM
K
II
pu
⁄()
E
1
–
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
××
=