ABB RELION 670 Series Applications Manual page 125

1MRK 505 337-UUS A
01
52
ZA
52
03
ANSI06000121 V1 EN-US
Figure 56: Example of H-type station
The requirement for the busbar protection scheme for this type of station may differ from utility
to utility. It is possible to apply just one overall differential zone, which protects both busbar
sections. However, at an internal fault on any of the two buses all feeder circuit breakers have to
be tripped, which will cause loss of supply to all loads connected to this station. Some utilities
prefer to have two differential zones, one for each bus section.
The most common setups for this type of station are given in the following table.
Table 16:
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)
Please note that table
any VT inputs.
Application manual
52
Typical solutions for H-type stations
16 is given for the preconfigured versions of REB670 which do not contain
02
52
ZB
52
04
xx06000121_ansi.vsd
Number of differential
zones/number of
feeders per zone
1/4
2/3
NA
NA
NA
Differential protection
Number of REB670 IEDs required for the
scheme
1
1
NA
NA
NA
Section 6
119