ABB Relion Technical Manual page 14

Table of contents
8
Signals........................................................................................256
Settings.......................................................................................257
Monitored data............................................................................258
Operation principle.......................................................................... 258
Low pass filtering........................................................................260
Technical data................................................................................. 261
Accidental energizing protection for synchronous generator
AEGGAPC (50AE)................................................................................261
Identification.................................................................................... 261
Functionality ................................................................................... 262
Function block................................................................................. 262
Signals.............................................................................................262
Settings............................................................................................263
Monitored data.................................................................................263
Operation principle.......................................................................... 263
Technical data................................................................................. 264
Negative-sequence time overcurrent protection for machines
NS2PTOC (46I2).................................................................................. 265
Identification.................................................................................... 265
Functionality.................................................................................... 265
Function block................................................................................. 266
Signals.............................................................................................267
Settings............................................................................................267
Monitored data.................................................................................268
Operation principle.......................................................................... 268
Pickup sensitivity........................................................................ 271
Alarm function.............................................................................271
Logic diagram............................................................................. 271
Technical data................................................................................. 272
Voltage-restrained time overcurrent protection VRPVOC (51V)...........273
Identification.................................................................................... 273
Functionality.................................................................................... 273
Function block................................................................................. 273
Signals.............................................................................................274
Settings............................................................................................275
Monitored data.................................................................................276
Operation principle.......................................................................... 276
Measured quantities................................................................... 276
Base quantities........................................................................... 276
Overcurrent protection................................................................276
Technical manual