ABB RED650 - Page 17

Settings......................................................................................403
Operation principle.................................................................... 403
Blocking scheme.................................................................. 404
Delta blocking scheme......................................................... 404
Permissive underreaching scheme...................................... 405
Permissive overreaching scheme........................................ 406
Unblocking scheme.............................................................. 406
Intertrip scheme....................................................................407
Simplified logic diagram....................................................... 408
Technical data........................................................................... 409
Current reversal and Weak-end infeed logic for distance
protection 3-phase ZCRWPSCH ................................................... 409
Identification.............................................................................. 409
Functionality.............................................................................. 409
Function block........................................................................... 410
Signals.......................................................................................410
Settings......................................................................................411
Operation principle.................................................................... 411
Current reversal logic........................................................... 411
Weak-end infeed logic..........................................................412
Technical data........................................................................... 414
Local acceleration logic ZCLCPSCH..............................................414
Identification.............................................................................. 414
Functionality.............................................................................. 414
Function block........................................................................... 414
Signals.......................................................................................415
Settings......................................................................................415
Operation principle.................................................................... 416
Zone extension.....................................................................416
Loss-of-Load acceleration.................................................... 416
Scheme communication logic for residual overcurrent
protection ECPSCH .......................................................................417
Identification.............................................................................. 417
Functionality.............................................................................. 417
Function block........................................................................... 418
Signals.......................................................................................418
Settings......................................................................................419
Operation principle.................................................................... 419
Blocking scheme.................................................................. 420
Permissive under/overreaching scheme.............................. 421
Unblocking scheme.............................................................. 422
Technical data........................................................................... 423
Current reversal and weak-end infeed logic for residual
overcurrent protection ECRWPSCH...............................................423
Table of contents
Line differential protection RED650 2.2 IEC 11
Technical manual