ABB RELION 670 Series Applications Manual page 133

1MRK 505 337-UUS A
189
289
BI1
BI2
Bus-Coupler
Bay
ANSI06000153 V1 EN-US
Figure 64: Bus coupler bay with two sets of CTs
Application manual
Zone A
Zone B
REB 670
Other
Equipment
CT Input
152
External or Internal
Bus-Coupler BFP
Backup Trip Command
Bus-Coupler Backup
OC Trip
CT Input
Other
Equipment
Parameter ZoneSel must
be set to "FixedToZA"
Bxxx
BLKTR
TRIP
CTRLZA
CONNZA
CTRLZB
CONNZB
TRM
TRZONE
TRBAY
A/D
I3PB1
OR
Bxxx
BLKTR
TRIP
CTRLZA
CONNZA
CTRLZB
CONNZB
TRZONE
TRBAY
A/D
I3PB1
Parameter ZoneSel must
be set to "FixedToZB"
BBP & BFP trip command to Bus-Coupler breaker
BOM
en06000153_ansi.vsd
Section 6
Differential protection
127