ABB RES670 Technical Manual page 10

Table of contents
4
Design........................................................................................ 167
Technical data................................................................................. 168
Section 8 Current protection..............................................................169
Directional phase overcurrent protection, four steps
OC4PTOC(51_67)................................................................................ 169
Identification.................................................................................... 169
Functionality.................................................................................... 169
Function block................................................................................. 170
Signals.............................................................................................171
Settings............................................................................................173
Monitored data.................................................................................178
Operation principle.......................................................................... 179
Technical data................................................................................. 187
Directional residual overcurrent protection, four steps EF4PTOC
(51N/67N)............................................................................................. 188
Identification.................................................................................... 188
Functionality.................................................................................... 188
Function block................................................................................. 189
Signals.............................................................................................189
Settings............................................................................................190
Monitored data.................................................................................198
Operation principle.......................................................................... 198
Operating quantity within the function........................................ 199
Internal polarizing....................................................................... 200
External polarizing for ground-fault function............................... 202
Directional detection for ground fault function............................ 202
Base quantities within the protection.......................................... 202
Internal ground-fault protection structure....................................203
Four residual overcurrent steps..................................................203
Directional supervision element with integrated directional
comparison function................................................................... 205
Second harmonic blocking element............................................207
Switch on to fault feature............................................................ 209
Technical data................................................................................. 212
Four step directional negative phase sequence overcurrent
protection NS4PTOC (46I2)..................................................................213
Identification.................................................................................... 213
Functionality.................................................................................... 213
Function block................................................................................. 214
Signals.............................................................................................215
Phasor measurement unit RES670 2.2 ANSI
Technical manual