ABB Relion 670 Series Technical Reference Manual page 164

Section 5
Differential protection
Name Values (Range)
IMaxAddDelay 0.20 - 5.00
tDefTime 0.000 - 6.000
tMinInv 0.001 - 6.000
CurveType ANSI Ext. inv.
ANSI Very inv.
ANSI Norm. inv.
ANSI Mod. inv.
ANSI Def. Time
L.T.E. inv.
L.T.V. inv.
L.T. inv.
IEC Norm. inv.
IEC Very inv.
IEC inv.
IEC Ext. inv.
IEC S.T. inv.
IEC L.T. inv.
IEC Def. Time
Programmable
RI type
RD type
TD 0.05 - 1.10
IdiffAlarm 0.05 - 1.00
tAlarmdelay 0.000 - 60.000
Table 80: LT6CPDIF (87LT) Group settings (advanced)
Name Values (Range)
EndSection1 0.20 - 1.50
EndSection2 1.00 - 10.00
SlopeSection2 10.0 - 50.0
SlopeSection3 30.0 - 100.0
p 0.01 - 1000.00
a 0.01 - 1000.00
b 0.01 - 1000.00
c 0.01 - 1000.00
Table continues on next page
158
Unit Step Default
IB 0.01 1.00
s 0.001 0.000
s 0.001 0.010
- - IEC Def. Time
- 0.01 1.00
IB 0.01 0.15
s 0.001 10.000
Unit Step Default
IB 0.01 1.25
IB 0.01 3.00
% 0.1 40.0
% 0.1 80.0
- 0.01 0.02
- 0.01 0.14
- 0.01 1.00
- 0.01 1.00
1MRK505222-UUS C
Description
Below limit, extra delay can be applied,
multiple of IBase
Definite time additional delay in seconds
Inverse Delay Minimum Time. In seconds
19 curve types. Example: 15 for definite time
delay.
Time Multiplier Setting (TMS) for inverse
delays
Sustained differential current alarm, factor of
IBase
Delay for alarm due to sustained differential
current, in s
Description
End of section 1, as multiple of reference
current IBase
End of section 2, as multiple of reference
current IBase
Slope in section 2 of operate-restrain
characteristic, in %
Slope in section 3 of operate- restrain
characteristic, in %
Settable curve parameter, user-
programmable curve type.
Settable curve parameter, user-
programmable curve type.
Settable curve parameter, user-
programmable curve type.
Settable curve parameter, user-
programmable curve type.
Technical reference manual