ABB RELION 670 Series Applications Manual page 124

Section 6
Differential protection
152 152
ANSI06000088 V1 EN-US
Figure 55: Example of two single busbar sections with bus-section circuit breaker and eight
This type of busbar arrangement can be quite easily protected. The most common setups for this
type of station are described in the following table.
Table 15:
Version of REB670 IED
3PH; 2-zones, 4-bays BBP (A20)
3PH; 2-zones, 8-bays BBP (A31)
1Ph; 2-zones, 12-bays BBP (B20)
1Ph; 2-zones, 12-bays BBP (B21)
1Ph; 2-zones, 24-bays BBP (B31)
)
* with just one CT input from bus-section bay
Please note that table
any VT inputs.
For station with just one CT in the bus-section bay, it might be required, depending on the client
requirements, to provide the special scheme for disconnection of bus-section CT when the bus-
section CB is open. For more information, refer to figure 45.
6.1.4.5 H-type busbar arrangements
The H-type stations are often used in transmission and sub-transmission networks as load-centre
substations, as shown in figure 56. These arrangements are very similar to the single busbar
station with sectionalizer or bus-section breaker, but are characterized by very limited number of
feeder bays connected to the station (normally only two OHL and two transformers).
118
ZA
152
152
152
feeder bays per each busbar section
Typical solutions for single busbar arrangements with bus-section breaker
15 is given for the preconfigured versions of REB670 which do not contain
ZB
152
152
xx06000088_ansi.vsd
Total number of
feeders in both busbar
sections
)
3* /6
)
7* /14
)
11* /22
)
11* /22
)
23* /46
1MRK 505 337-UUS A
Number of REB670 IEDs
required for the scheme
1/2
1/2
3/6
3/6
3/6
Application manual
M6644-3 v4