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Section 7
Current protection
Name
t1Min
HarmRestrain1
DirMode2
IN2>
t2
IMin2
HarmRestrain2
DirMode3
IN3>
t3
IMin3
HarmRestrain3
DirMode4
Characterist4
IN4>
t4
k4
Table continues on next page
92
Values (Range)
Unit
0.000 - 60.000
s
Off
-
On
Off
-
Non-directional
Forward
Reverse
1 - 2500
%IB
0.000 - 60.000
s
1 - 10000
%IB
Off
-
On
Off
-
Non-directional
Forward
Reverse
1 - 2500
%IB
0.000 - 60.000
s
1 - 10000
%IB
Off
-
On
Off
-
Non-directional
Forward
Reverse
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
Reserved
RI type
RD type
1 - 2500
%IB
0.000 - 60.000
s
0.05 - 999.00
-
Step
Default
0.001
0.000
-
On
-
Non-directional
1
50
0.001
0.400
1
50
-
On
-
Non-directional
1
33
0.001
0.800
1
33
-
On
-
Non-directional
-
ANSI Def. Time
1
17
0.001
1.200
0.01
0.05
1MRK 505 288-UEN A
Description
Minimum operate time for inverse curves
for step 1
Enable block of step 1 from harmonic
restrain
Directional mode of step 2 (off, non-
directional, forward, reverse)
Operate residual current level for step 2 in
% of IBase
Independent (definite) time delay of step 2
Minimum operate current for step 2 in % of
IBase
Enable block of step 2 from harmonic
restrain
Directional mode of step 3 (off, non-
directional, forward, reverse)
Operate residual current level for step 3 in
% of IBase
Independent (definite) time delay of step 3
Minimum operate current for step 3 in % of
IBase
Enable block of step 3 from harmonic
restrain
Directional mode of step 4 (off, non-
directional, forward, reverse)
Time delay curve type for step 4
Operate residual current level for step 4 in
% of IBase
Independent (definite) time delay of step 4
Time multiplier for the dependent time
delay for step 4
Technical manual
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