ABB REB670 Series Applications Manual page 129

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1MRK 505 370-UEN D
QB1
QB2
2400/1
QA1
BI2
2400/1
Bus-Coupler
Bay
IEC06000153 V1 EN-US
Figure 64: Bus coupler bay with two sets of CTs
Busbar protection REB670
Application manual
Zone A
Zone B
REB 670
Other
Equipment
CT Input
BI1
External or Internal
Bus-Coupler BFP
Backup Trip Command
Bus-Coupler Backup
CT Input
Other
Equipment
Bxxx
BLKTR
CTRLZA
CTRLZB
TRM
TRZONE
TRBAY
A/D
I3PB1
Bxxx
BLKTR
OC Trip
CTRLZA
CTRLZB
TRZONE
TRBAY
A/D
I3PB1
BBP & BFP trip command to Bus-Coupler breaker
Parameter ZoneSel must
be set to "FixedToZA"
TRIP
CONNZA
CONNZB
OR
TRIP
BOM
CONNZA
CONNZB
Parameter ZoneSel must
be set to "FixedToZB"
en06000153.vsd
Section 6
Differential protection
123

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