6.1.4.9 Double busbar arrangements with two bus-section breakers and two
bus-coupler breakers
M6649-3 v5
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.
BI1
QA1
QB1 QB2
BI1
QA1
QB1 QB2
BI1
QA1
QB1 QB2
BI1
QA1
QB1 QB2
BI1
QA1
QB1 QB2
BI1
QA1
QB1 QB2
BI1
QA1
QB1 QB2
BI1
QA1
QB1 QB2
BI1
QA1
BI1
QA1
BI1
QA1
BI1
QB1 QB2
QA1
BI1
QA1
ZA1
ZB1
ZA2
ZB2
xx06000016.vsd
IEC06000016 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.
Table 21: Possible solutions for a typical GIS station
Version of REB670 IED Number of feeders on
each side of the
station (excluding
bus-coupler & bus-
section bays)
Number of REB670 IEDs required for
the scheme
3PH; 2-zones, 4-bays BBP (A20) NA NA
3PH; 2-zones, 8-bays BBP (A31)
5*
)
2
1Ph; 2-zones, 12-bays BBP (B20) NA NA
1Ph; 2-zones, 12-bays BBP (B21)
9*
)
6
1Ph; 2-zones, 24-bays BBP (B31)
21*
)
6
*
)
with just one CT input from bus-coupler bay
Please note that Table 21 is given for the preconfigured versions of REB670 which do not
contain any VT inputs.
Provision for zone selection, disconnector replica and zone interconnection have to be
included into the scheme design.
For station with just one CT in the bus-coupler or bus-section bays, it might be required,
depending on the client requirements, to provide the special scheme for disconnection of bus-
coupler or bus-section CT when the bus-coupler or bus-section CB is open. For more info
please refer to Figure
47
6.1.4.10 Combined busbar arrangements
M6650-3 v5
There are stations which are practically a combination between two normal types of station
arrangements, which are already previously described. Some typical examples will be shown
here:
1MRK 505 370-UEN D Section 6
Differential protection
Busbar protection REB670 125
Application manual
To Next Page
Loading...
