For station with just one CT in the bus-coupler bay, it might be required, depending on
the client requirements, to provide the special scheme for disconnection of bus-coupler
CT when the bus-coupler CB is open. For more info please refer to Figure 48.
Some principle overall drawings of how to use REB670 in this type of station are given
in Figure 63 to Figure 67.
en06000151_ansi.vsd
Zone A
Zone B
Feeder Bay
Other
Equipment
REB 670
a
A/D
CT Input
Main
contact
Aux. a
contact
Aux. b
contact
Open
Open
Closed Open
Closed
Closed
CTRLZA
CTRLZB
TRIP
CONNZA
CONNZB
Bxxx
I3PB1
BLKTR
TRZONE
TRBAY
NO
NC
CLOSED
OPEN
ALARM
FORCED
SSxx
DISABLE
NO
NC
CLOSED
OPEN
ALARM
FORCED
SSxx
DISABLE
BBP & BFP trip command to feeder breaker
BIM
BOM
Set Parameter
ZoneSel="CtrlIncludes"
TRM
External or Internal
Feeder BFP Backup Trip
Command
Feeder Backup
OC Trip
Disconnector aux. contact timing
(Aux. contact a timing is only crucial when Scheme2_INX is used)
989
152
b
189
b
289
a
ANSI06000151 V1 EN-US
Figure 63: Feeder bay where a&b aux. contacts are used
1MRK 505 370-UUS A Section 6
Differential protection
Busbar protection REB670 2.2 ANSI 147
Application manual
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