7.
Set parameter
ROADir to value 90 degree
8. Set parameter
LowVolt_VM to value 5%
9. Enable one overcurrent step (for example, OC1)
10. Select parameter
CurveType_OC1 to value IEC Def. Time
11. Set parameter
StartCurr_OC1 to value 38%
12. Set parameter
tDef_OC1 to value 2.0s (typical setting)
13. Set parameter
DirMode_OC1 to Forward
14. Set parameter
DirPrinc_OC1 to IcosPhi&U
15. Set parameter
ActLowVolt1_VM to Block
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
shows overall protection characteristic
Furthermore the other build-in protection elements can be used for other protection and
alarming purposes.
0.2
0.4
0.6
-0.2
0.6
0.8
0.8
1
D
ILowSet
B
A
C
0.4
0.2
0
1.2
1.4
-0.4
-0.6
-0.8
-rca
Operating Region
Q [pu]
P
[pu]
rca
U
PS
I
PS
ILowSet
Operating region
en05000535.vsd
IEC05000535 V2 EN-US
Figure 305: Loss of excitation
1MRK 505 343-UEN B
Section 11
Multipurpose protection
505
Application manual
Содержание Relion 670 series
Страница 1: ...RELION 670 SERIES Line differential protection RED670 Version 2 1 IEC Application manual...
Страница 2: ......
Страница 40: ...34...
Страница 64: ...58...
Страница 150: ...144...
Страница 406: ...400...
Страница 472: ...466...
Страница 494: ...488...
Страница 512: ...506...
Страница 524: ...518...
Страница 604: ...598...
Страница 686: ...680...
Страница 718: ...712...
Страница 722: ...716...
Страница 758: ...752...
Страница 759: ...753...