ABB REG670 Technical Manual page 14

Table of contents
8
Internal polarizing................................................................. 363
External polarizing for earth-fault function............................364
Directional detection for earth fault function......................... 364
Base quantities within the protection....................................365
Internal earth-fault protection structure................................ 365
Four residual overcurrent steps............................................365
Directional supervision element with integrated
directional comparison function............................................366
Second harmonic blocking element..................................... 369
Switch on to fault feature......................................................371
Technical data........................................................................... 373
Four step directional negative phase sequence overcurrent
protection NS4PTOC .....................................................................374
Identification.............................................................................. 374
Functionality.............................................................................. 374
Function block........................................................................... 375
Signals.......................................................................................375
Settings......................................................................................376
Monitored data...........................................................................381
Operation principle.................................................................... 381
Operating quantity within the function.................................. 381
Internal polarizing facility of the function.............................. 382
External polarizing for negative sequence function..............383
Internal negative sequence protection structure.................. 383
Four negative sequence overcurrent stages........................ 383
Directional supervision element with integrated
directional comparison function............................................384
Technical data........................................................................... 387
Sensitive directional residual overcurrent and power protection
SDEPSDE ..................................................................................... 387
Identification.............................................................................. 387
Functionality.............................................................................. 388
Function block........................................................................... 389
Signals.......................................................................................390
Settings......................................................................................391
Monitored data...........................................................................393
Operation principle.................................................................... 393
Function inputs..................................................................... 393
Technical data........................................................................... 399
Thermal overload protection, two time constants TRPTTR ........... 400
Identification.............................................................................. 401
Functionality.............................................................................. 401
Function block........................................................................... 401
Signals.......................................................................................402
Technical manual