ABB RELION 670 Series Applications Manual page 135

1MRK 505 337-UUS A
189
289
BI1
Bus-Coupler
Bay
ANSI06000155 V1 EN-US
Figure 66: Bus coupler bay with one CT and b aux. contact only from CB
6.1.4.9 Double busbar arrangements with two bus-section breakers and two bus-
coupler breakers
This type of station is commonly used for GIS installations. It offers high operational flexibility. For
this type of stations, two schemes similar to the double busbar station scheme can be used.
ZA1
ZB1
189 289
152
ANSI06000016 V1 EN-US
Figure 67: Example of typical GIS station layout
With REB670 this type of arrangement can be protected as described in the following table.
Application manual
Zone A
Zone B
REB 670
b
152
BIM
CB Closing
Signal
External or Internal
Bus-Coupler BFP
Backup Trip Command
Bus-Coupler Backup
OC Trip
TRM
CT Input
A/D
Other
Equipment
189 289 189 289 189 289 189
152 152
152 152
t=1s
t
OR
AND
Bxxx
BLKTR
TRIP
CTRLZA
CONNZA
CTRLZB
CONNZB
ZEROCUR
TRZONE
TRBAY
I3PB1
Parameter ZoneSel must
be set to "FixedToZA&-ZB"
tZeroCurrent=150ms
BBP & BFP trip command to Bus-Coupler breaker
en06000155_ansi.vsd
152
152
289 189 289 189 289 189 289 189 289
152 152
BOM
ZA2
ZB2
152
152
152 152
xx06000016_ansi.vsd
Section 6
Differential protection
M6649-3 v4
129