
5.3 Five zone distance protection, mho characteristic ZMOPDIS (21)........................................ 101
5.3.1 Identification..................................................................................................................................101
5.3.2 Functionality.................................................................................................................................. 101
5.3.3 Function block............................................................................................................................... 102
5.3.4 Signals.............................................................................................................................................102
5.3.5 Settings...........................................................................................................................................103
5.3.6 Operation principle...................................................................................................................... 106
5.3.6.1 Full scheme measurement.................................................................................................... 106
5.3.6.2 Impedance characteristic...................................................................................................... 107
5.3.6.3 Basic operation characteristics........................................................................................... 108
5.3.6.4 Theory of operation................................................................................................................109
5.3.7 Technical data................................................................................................................................ 117
5.4 Faulty phase identification with load enchroachment for mho FMPSPDIS.........................118
5.4.1 Identification..................................................................................................................................118
5.4.2 Functionality...................................................................................................................................118
5.4.3 Function block................................................................................................................................118
5.4.4 Signals............................................................................................................................................. 119
5.4.5 Settings........................................................................................................................................... 119
5.4.6 Operation principle.......................................................................................................................120
5.4.6.1 The phase selection function................................................................................................120
5.4.7 Technical data................................................................................................................................129
5.5 Directional impedance quadrilateral and mho ZDNRDIR (21D)..............................................129
5.5.1 Identification..................................................................................................................................129
5.5.2 Functionality.................................................................................................................................. 129
5.5.3 Function block............................................................................................................................... 129
5.5.4 Signals.............................................................................................................................................130
5.5.5 Settings...........................................................................................................................................130
5.5.6 Monitored data.............................................................................................................................. 131
5.5.7 Operation principle....................................................................................................................... 131
5.6 Phase preference logic PPLPHIZ.................................................................................................. 134
5.6.1 Identification................................................................................................................................. 134
5.6.2 Functionality.................................................................................................................................. 134
5.6.3 Function block............................................................................................................................... 134
5.6.4 Signals............................................................................................................................................. 134
5.6.5 Settings...........................................................................................................................................135
5.6.6 Operation principle.......................................................................................................................135
5.6.6.1 Operation principle................................................................................................................. 135
5.6.7 Technical data................................................................................................................................137
5.7 Power swing detection ZMRPSB (68)..........................................................................................138
5.7.1 Identification................................................................................................................................. 138
5.7.2 Functionality.................................................................................................................................. 138
5.7.3 Function block............................................................................................................................... 138
5.7.4 Signals............................................................................................................................................. 139
Table of contents
Line distance protection REL650 3
Technical manual
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