CHAPTER 5: SETTINGS GROUPED ELEMENTSD60 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 5-2515T = operate time (in seconds)TDM = Multiplier settingI = input currentIpickup = Pickup Current settingK, E = constants defined in the tabletr = characteristic constant defined in the tableTRESET = reset time in seconds (assuming energy capacity is 100% and RESET is “Timed”)Table 5-32: IEC (BS) inverse time curve constantsTable 5-33: IEC curve trip times (in seconds)IEC (BS) curve shape K E trIEC Curve A (BS142) 0.140 0.020 9.7IEC Curve B (BS142) 13.500 1.000 43.2IEC Curve C (BS142) 80.000 2.000 58.2IEC Short Inverse 0.050 0.040 0.500Multiplier(TDM)Current ( I / I pickup)1.5 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0IEC Curve A0.05 0.860 0.501 0.315 0.249 0.214 0.192 0.176 0.165 0.156 0.1490.10 1.719 1.003 0.630 0.498 0.428 0.384 0.353 0.330 0.312 0.2970.20 3.439 2.006 1.260 0.996 0.856 0.767 0.706 0.659 0.623 0.5940.40 6.878 4.012 2.521 1.992 1.712 1.535 1.411 1.319 1.247 1.1880.60 10.317 6.017 3.781 2.988 2.568 2.302 2.117 1.978 1.870 1.7820.80 13.755 8.023 5.042 3.984 3.424 3.070 2.822 2.637 2.493 2.3761.00 17.194 10.029 6.302 4.980 4.280 3.837 3.528 3.297 3.116 2.971IEC Curve B0.05 1.350 0.675 0.338 0.225 0.169 0.135 0.113 0.096 0.084 0.0750.10 2.700 1.350 0.675 0.450 0.338 0.270 0.225 0.193 0.169 0.1500.20 5.400 2.700 1.350 0.900 0.675 0.540 0.450 0.386 0.338 0.3000.40 10.800 5.400 2.700 1.800 1.350 1.080 0.900 0.771 0.675 0.6000.60 16.200 8.100 4.050 2.700 2.025 1.620 1.350 1.157 1.013 0.9000.80 21.600 10.800 5.400 3.600 2.700 2.160 1.800 1.543 1.350 1.2001.00 27.000 13.500 6.750 4.500 3.375 2.700 2.250 1.929 1.688 1.500IEC Curve C0.05 3.200 1.333 0.500 0.267 0.167 0.114 0.083 0.063 0.050 0.0400.10 6.400 2.667 1.000 0.533 0.333 0.229 0.167 0.127 0.100 0.0810.20 12.800 5.333 2.000 1.067 0.667 0.457 0.333 0.254 0.200 0.1620.40 25.600 10.667 4.000 2.133 1.333 0.914 0.667 0.508 0.400 0.3230.60 38.400 16.000 6.000 3.200 2.000 1.371 1.000 0.762 0.600 0.4850.80 51.200 21.333 8.000 4.267 2.667 1.829 1.333 1.016 0.800 0.6461.00 64.000 26.667 10.000 5.333 3.333 2.286 1.667 1.270 1.000 0.808IEC Short Inverse0.05 0.153 0.089 0.056 0.044 0.038 0.034 0.031 0.029 0.027 0.0260.10 0.306 0.178 0.111 0.088 0.075 0.067 0.062 0.058 0.054 0.0520.20 0.612 0.356 0.223 0.175 0.150 0.135 0.124 0.115 0.109 0.1040.40 1.223 0.711 0.445 0.351 0.301 0.269 0.247 0.231 0.218 0.2070.60 1.835 1.067 0.668 0.526 0.451 0.404 0.371 0.346 0.327 0.3110.80 2.446 1.423 0.890 0.702 0.602 0.538 0.494 0.461 0.435 0.415
