ABB REG670 - Page 12

Functionality.............................................................................. 279
Description of input signals........................................................280
Description of output signals..................................................... 280
Function block........................................................................... 282
Signals.......................................................................................282
Settings......................................................................................283
Monitored data...........................................................................284
Operation principle.................................................................... 285
The injection unit REX060....................................................286
Rotor Earth Fault Protection function................................... 287
General measurement of earth fault impedance.................. 288
Simplified logic diagram....................................................... 290
Technical data........................................................................... 292
100% stator earth fault protection, injection based STTIPHIZ .......293
Identification.............................................................................. 293
Functionality.............................................................................. 293
Description of input signals........................................................294
Description of output signals..................................................... 294
Function block........................................................................... 296
Signals.......................................................................................296
Settings......................................................................................297
Monitored data...........................................................................298
Operation principle.................................................................... 299
Configuration principle..........................................................299
Generator system earthing methods.................................... 302
100% Stator earth fault protection function.......................... 306
General measurement of earth fault impedance.................. 310
Measuring reference impedance..........................................312
Simplified logic diagram....................................................... 317
Technical data........................................................................... 318
Under impedance protection for generators and transformers
ZGVPDIS........................................................................................319
Identification.............................................................................. 319
Functionality.............................................................................. 319
Function block........................................................................... 319
Signals.......................................................................................320
Settings......................................................................................320
Monitored data...........................................................................322
Operation principle.................................................................... 322
Operation principle of zone 1............................................... 324
Operation principle of zone 2............................................... 326
Operation principle of zone 3............................................... 330
Load encroachment..............................................................330
Table of contents
6
Technical manual