tripped, but supply to any load will not be interrupted. The tripping logic for the circuit
breaker failure protection must be carefully arranged.
The most common setups for this type of busbar arrangement are described in the
following table.
Table 18: Typical solutions for double circuit breaker busbar arrangement
Version of REB670 IED Numbers of feeders per
station
Number of REB670 IEDs
required for the scheme
3PH; 2-zones, 4-bays BBP (A20) 4 2
3PH; 2-zones, 8-bays BBP (A31) 4/8 1/2
1Ph; 2-zones, 12-bays BBP (B20) 6/12 3/6
1Ph; 2-zones, 12-bays BBP (B21) 6/12 3/6
1Ph; 2-zones, 24-bays BBP (B31) 12/24 3/6
Please note that Table 18 is given for the preconfigured versions of REB670 which do
not contain any VT inputs.
A principle overall drawing of how to use REB670 for this type of station is given in
Figure 59.
Section 6 1MRK 505 370-UUS A
Differential protection
142 Busbar protection REB670 2.2 ANSI
Application manual
To Next Page
Loading...
