ABB Relion 670 Series Applications Manual page 244

Section 10
Multipurpose protection
13. Set parameter
14. Set parameter
15. Set parameter
Proper operation of the CVGAPC function made in this way can easily be verified by secondary
injection. All other settings can be left at the default values. However it shall be noted that set
values for RCA & ROA angles will be applicable for OC2 step if directional feature is enabled for this
step as well. Figure
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
-0.2
-0.4
-0.6
-0.8
ANSI05000535 V1 EN-US
Figure 98: Loss of excitation
238
DirMode_OC1 to Forward
DirPrinc_OC1 to IcosPhi&V
ActLowVolt1_VM to Block
98 shows overall protection characteristic
Q [pu]
A
B
1
0.2 0.4 0.6 0.8
-rca
C
ILowSet
D
Operating Region
Operating region
ILowSet
P [pu]
1.2
1.4
1MRK 511 358-UUS A
I
PS
rca
V
PS
en05000535_ansi.vsd
Application manual