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1MRK 505 370-UEN D
b a
QB1
QB2
QA1
BI1
1200/1
QB9
Feeder Bay
IEC06000151 V1 EN-US
Figure 62: Feeder bay where a&b aux. contacts are used
Busbar protection REB670
Application manual
Disconnector aux. contact timing
(Aux. contact a timing is only crucial when Scheme2_INX is used)
Zone A
Main
contact
Zone B
Aux. a
contact
Aux. b
contact
SSxx
DISABLE
NO
NC
b a
SSxx
DISABLE
NO
NC
BIM
External or Internal
Feeder BFP Backup Trip
Feeder Backup
OC Trip
CT Input
Other
TRM
Equipment
BBP & BFP trip command to feeder breaker
Open
Closed
Open
Closed
Closed Open
CLOSED
OPEN
ALARM
FORCED
Set Parameter
CLOSED
ZoneSel="CtrlIncludes"
OPEN
ALARM
FORCED
Bxxx
Command
BLKTR
CTRLZA
CTRLZB
TRZONE
TRBAY
A/D
I3PB1
REB 670
TRIP
CONNZA
CONNZB
BOM
en06000151.vsd
Section 6
Differential protection
121
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