ABB Relion 670 Series Applications Manual page 263

1MRK 511 401-UEN Rev. K
70
60
50
40
30
20
10
0
IEC19000727 V1 EN-US
Figure 123: Differential voltage variation with number of units failure for considered
Table 42: Parameter and settings values for the grounded capacitor bank
Name
SCBGndType
NeutVoltMeas
UMin>
VoltRatioL1
VoltRatioL2
VoltRatioL3
URatioVar>
UdifWrn>
tDefWrn
UdifAlm>
tDefAlm
Udif>
BlockTrip
CurveType
tDefTrip
tMin
tReset
k
tPCrv
tACrv
tBCrv
tCCrv
tDCrv
CrvSat
Bay control REC670
Application manual
Alarm
Warning
6.25
4.3478
2.7027
0
1.2658
0 1 2 3 4
grounded capacitor bank
© Copyright 2017 Hitachi Power Grids. All rights reserved
Trip
23.0769
18.1818
14.2857
11.111
8.4746
5 6 7 8 9
Number of units failure
Default value
Grounded
Available
50.0% of UBase
0.50
0.50
0.50
10.00
3% of UBase
5.00
5% of UBase
5.00
7% UBase
Trip enabled
Programmable
5.00
0.10
0.02
0.05
1.000
1.000
1.00
0.0
0.000
0
Unbalance protection
68.4211
50
37.931
29.4118
14
10 11 12 13
IEC19000727-1-en.vsdx
Section 10
257