ABB REB670 Series Applications Manual page 243

1MRK 505 370-UEN D
Furthermore the other build-in protection elements can be used for other protection and
alarming purposes.
0.8
0.6
0.4
0.2
-0.2
-0.4
-0.6
-0.8
IEC05000535 V2 EN-US
Figure 118: Loss of excitation
Busbar protection REB670
Application manual
Q [pu]
A
B
0
0.2 0.4 0.6 0.8
-rca
C
ILowSet
D
Operating Region
Operating region
ILowSet
P
1 1.2 1.4
[pu]
Multipurpose protection
I
PS
rca
U
PS
en05000535.vsd
Section 10
237