ABB Relion 650 Series Technical Manual page 15

7.3.1 Identification................................................................................................................................. 246
7.3.2 Functionality..................................................................................................................................246
7.3.3 Function block...............................................................................................................................246
7.3.4 Signals.............................................................................................................................................247
7.3.5 Settings...........................................................................................................................................247
7.3.6 Monitored data............................................................................................................................. 248
7.3.7 Operation principle...................................................................................................................... 248
7.3.7.1
7.3.7.2
7.3.7.3
7.3.7.4
7.3.8 Technical data................................................................................................................................251
7.4 Loss of voltage check LOVPTUV (27)...........................................................................................251
7.4.1 Identification..................................................................................................................................251
7.4.2 Functionality.................................................................................................................................. 251
7.4.3 Function block............................................................................................................................... 252
7.4.4 Signals.............................................................................................................................................252
7.4.5 Settings...........................................................................................................................................252
7.4.6 Operation principle...................................................................................................................... 253
7.4.7 Technical data............................................................................................................................... 254
Section 8 Frequency protection..................................................................................... 255
8.1 Underfrequency protection SAPTUF (81)...................................................................................255
8.1.1 Identification................................................................................................................................. 255
8.1.2 Functionality.................................................................................................................................. 255
8.1.3 Function block............................................................................................................................... 255
8.1.4 Signals.............................................................................................................................................255
8.1.5 Settings.......................................................................................................................................... 256
8.1.6 Monitored data............................................................................................................................. 256
8.1.7 Operation principle...................................................................................................................... 256
8.1.7.1
8.1.7.2
8.1.7.3
8.1.7.4
8.1.8 Technical data............................................................................................................................... 258
8.2 Overfrequency protection SAPTOF (81)..................................................................................... 258
8.2.1 Identification................................................................................................................................. 259
8.2.2 Functionality.................................................................................................................................. 259
8.2.3 Function block...............................................................................................................................259
8.2.4 Signals.............................................................................................................................................259
8.2.5 Settings.......................................................................................................................................... 260
8.2.6 Monitored data............................................................................................................................. 260
8.2.7 Operation principle...................................................................................................................... 260
Line distance protection REL650
Technical manual
Measurement principle.......................................................................................................... 248
Time delay.................................................................................................................................249
Blocking.....................................................................................................................................249
Design........................................................................................................................................250
Measurement principle.......................................................................................................... 256
Time delay................................................................................................................................. 257
Blocking..................................................................................................................................... 257
Design........................................................................................................................................ 257
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