P54x/EN AP/La4 Application Notes
(AP) 6-2
MiCOM P543, P544, P545 & P546
AP
2.3.17.1 Setting option recommendation (Distance option only) 26
2.3.17.2 Blinder limits determination (Distance option only) 27
2.3.17.3 Delta t, R5 and R6 setting determination (Distance option only) 29
2.3.17.4 Tost (trip delay) setting (Distance option only) 30
2.3.17.5 Blinder angle setting (Distance option only) 30
2.3.17.6 Out of step operation on series compensated lines (Distance option only) 30
2.3.18 Switch on to fault (SOTF) and trip on reclose (TOR) (Distance option only) 31
2.3.19 Switch onto fault mode (Distance option only) 31
2.3.20 Trip on reclose mode (Distance option only) 32
2.3.21 Setup of DEF (Distance option only) 32
2.3.22 DEF negative sequence polarization (Distance option only) 32
2.3.23 General setting guidelines for DEF (directional ground overcurrent) (Distance option only) 32
2.3.24 Delta directional comparison principle and setup (Distance option only) 32
2.3.25 Delta directional comparison - selection of I and V threshold (Distance option only) 33
2.4 Channel aided schemes (Distance option only) 34
2.4.1 Distance scheme PUR - permissive underreach transfer trip (Distance option only) 34
2.4.2 Distance scheme POR - permissive overreach transfer trip (Distance option only) 34
2.4.3 Permissive overreach trip reinforcement (Distance option only) 34
2.4.4 Permissive overreach scheme weak infeed features (Distance option only) 34
2.4.5 Distance scheme BLOCKING (Distance option only) 35
2.4.6 Permissive overreach schemes current reversal guard (Distance option only) 35
2.4.7 Blocking scheme current reversal guard (Distance option only) 35
2.4.8 Aided DEF ground fault scheme - permissive overreach (Distance option only) 35
2.4.9 Aided DEF ground fault scheme - blocking (Distance option only) 35
2.4.10 Delta scheme POR - permissive overreach transfer trip (Distance option only) 36
2.4.11 Delta blocking scheme (Distance option only) 36
2.4.12 Delta schemes current reversal guard timer (Distance option only) 36
2.5 Loss of load accelerated tripping (LoL) (Distance option only) 36
2.6 Phase fault overcurrent protection 36
2.6.1 Directional overcurrent characteristic angle settings 37
2.7 Thermal overload protection 37
2.7.1 Single time constant characteristic 37
2.7.2 Dual time constant characteristic 37
2.8 Earth fault (ground overcurrent) and sensitive earth fault (SEF) protection 38
2.8.1 Directional earth fault protection 38
2.8.1.1 Residual voltage polarization 38
2.8.2 General setting guidelines for directional earth fault (ground overcurrent) protection 38
2.8.3 Sensitive earth fault protection element (SEF) 38
2.9 Negative sequence overcurrent protection (NPS) 39
2.9.1 Negative phase sequence current threshold, '2> current set' 40
2.9.2 Time delay for the NPS overcurrent element, ‘2> time delay’ 40
2.9.3 Directionalizing the negative phase sequence overcurrent element 40
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