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Section 7
Current protection
Name
DirMode3
I3>
t3
DirMode4
Characterist4
I4>
t4
k4
IMin4
t4Min
Table 32:
OC4PTOC Group settings (advanced)
Name
HarmRestrain
2ndHarmStab
HarmRestrain1
HarmRestrain2
HarmRestrain3
HarmRestrain4
82
Values (Range)
Unit
Off
-
Non-directional
Forward
Reverse
5 - 2500
%IB
0.000 - 60.000
s
Off
-
Non-directional
Forward
Reverse
ANSI Ext. inv.
-
ANSI Very inv.
ANSI Norm. 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
Reserved
RI type
RD type
5 - 2500
%IB
0.000 - 60.000
s
0.05 - 999.00
-
5 - 10000
%IB
0.000 - 60.000
s
Values (Range)
Unit
Off
-
On
5 - 100
%IFund
Off
-
On
Off
-
On
Off
-
On
Off
-
On
Step
Default
-
Non-directional
1
250
0.001
0.800
-
Non-directional
-
ANSI Def. Time
1
175
0.001
2.000
0.01
0.05
1
100
0.001
0.000
Step
Default
-
Off
1
20
-
Off
-
Off
-
Off
-
Off
1MRK 505 288-UEN A
Description
Directional mode of step 3 off / non-
directional / forward / reverse
Phase current operate level for step3 in %
of IBase
Definite time delay of step 3
Directional mode of step 4 off / non-
directional / forward / reverse
Selection of time delay curve type for step
4
Phase current operate level for step 4 in %
of IBase
Definite time delay of step 4
Time multiplier for the inverse time delay
for step 4
Minimum operate current for step4 in % of
IBase
Minimum operate time for inverse curves
for step 4
Description
Enable block from harmonic restrain
Operate level of 2nd harm restrain op in %
of Fundamental
Enable block of step 1 from harmonic
restrain
Enable block of step 2 from harmonic
restrain
Enable block of step3 from harmonic
restrain
Enable block of step 4 from harmonic
restrain
Technical manual
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