ABB Relion 670 series - Page 24

Identification.................................................................................... 742
Application....................................................................................... 742
Setting guidelines............................................................................ 742
Single command, 16 signals SINGLECMD.......................................... 742
Identification.................................................................................... 743
Application....................................................................................... 743
Setting guidelines............................................................................ 745
Section 16 Scheme communication.................................................... 747
Scheme communication logic for distance or overcurrent protection
ZCPSCH(85).........................................................................................747
Identification.................................................................................... 747
Application....................................................................................... 747
Blocking schemes.......................................................................748
Delta blocking scheme............................................................... 749
Permissive schemes...................................................................750
Intertrip scheme..........................................................................753
Setting guidelines............................................................................ 754
Blocking scheme........................................................................ 754
Delta blocking scheme............................................................... 754
Permissive underreaching scheme............................................ 755
Permissive overreaching scheme...............................................755
Unblocking scheme.................................................................... 755
Intertrip scheme..........................................................................756
Phase segregated scheme communication logic for distance
protection ZC1PPSCH (85).................................................................. 756
Identification.................................................................................... 756
Application....................................................................................... 756
Blocking scheme........................................................................ 758
Permissive schemes...................................................................758
Intertrip scheme..........................................................................760
Setting guidelines............................................................................ 760
Permissive underreache scheme............................................... 761
Permissive overreach scheme................................................... 761
Blocking scheme........................................................................ 761
Intertrip scheme..........................................................................761
Current reversal and Weak-end infeed logic for distance protection
3-phase ZCRWPSCH (85)....................................................................762
Identification.................................................................................... 762
Application....................................................................................... 762
Current reversal logic................................................................. 762
Table of contents
18 Line distance protection REL670 2.2 ANSI
Application manual