GE Multilin 350 Series Instruction Manual

Also see for ML Series 350: Communications manual User manual Communications manual Instruction manual

CHAPTER 6: SETPOINTS S3 PROTECTION350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–29USER CurvesThe relay provides a selection of user definable curve shapes used by the time overcurrentprotection. The User curve is programmed by selecting the proper parameters in theformula:A, P, Q, B, K - selectable curve parameters within the ranges from the table: D is the TimeDial Multiplier.User Curve can be used on multiple elements only if the time dial multiplier is the same foreach element.V = I/I PICKUP (TOC setting) is the ratio between the measured current and the pickup setting.NOTENOTE:The maximum trip time for the User Curve is limited to 65.535 seconds. The User Curve canbe used for one protection situation only.6.0 17.407 7.872 3.225 2.061 1.598 1.359 1.215 1.117 1.046 0.9928.0 23.209 10.497 4.299 2.747 2.131 1.813 1.620 1.490 1.395 1.32310.0 29.012 13.121 5.374 3.434 2.663 2.266 2.025 1.862 1.744 1.654IAC Inverse0.5 0.578 0.375 0.266 0.221 0.196 0.180 0.168 0.160 0.154 0.1481.0 1.155 0.749 0.532 0.443 0.392 0.360 0.337 0.320 0.307 0.2972.0 2.310 1.499 1.064 0.885 0.784 0.719 0.674 0.640 0.614 0.5944.0 4.621 2.997 2.128 1.770 1.569 1.439 1.348 1.280 1.229 1.1886.0 6.931 4.496 3.192 2.656 2.353 2.158 2.022 1.921 1.843 1.7818.0 9.242 5.995 4.256 3.541 3.138 2.878 2.695 2.561 2.457 2.37510.0 11.552 7.494 5.320 4.426 3.922 3.597 3.369 3.201 3.072 2.969IAC Short Inverse0.5 0.072 0.047 0.035 0.031 0.028 0.027 0.026 0.026 0.025 0.0251.0 0.143 0.095 0.070 0.061 0.057 0.054 0.052 0.051 0.050 0.0492.0 0.286 0.190 0.140 0.123 0.114 0.108 0.105 0.102 0.100 0.0994.0 0.573 0.379 0.279 0.245 0.228 0.217 0.210 0.204 0.200 0.1976.0 0.859 0.569 0.419 0.368 0.341 0.325 0.314 0.307 0.301 0.2968.0 1.145 0.759 0.559 0.490 0.455 0.434 0.419 0.409 0.401 0.39410.0 1.431 0.948 0.699 0.613 0.569 0.542 0.524 0.511 0.501 0.493Multiplier (TDM)1.5 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0Parameters A B P Q KRange 0 to 125 0 to 3 0 to 3 0 to 2 0 to 1.999Step 0.0001 0.0001 0.0001 0.0001 0.001Unit sec sec NA NA secDefault Value 0.05 0 0.04 1.0 0