6.1.3.4
Settings
Table 31:
T3WPDIF Group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
Operation
Off
On
-
-
Off
Operation Off / On
IdMin
0.10 - 0.60
IB
0.01
0.30
Section 1 sensitivity current, usually W1
current
EndSection1
0.20 - 1.50
IB
0.01
1.25
End of section 1, multiple of W1 rated
current
EndSection2
1.00 - 10.00
IB
0.01
3.00
End of section 2, multiple of W1 rated
current
SlopeSection2
10.0 - 50.0
%
0.1
40.0
Slope in section 2 of operate-restrain
characteristics
SlopeSection3
30.0 - 100.0
%
0.1
80.0
Slope in section 3 of operate-restrain
characteristics
IdUnre
1.00 - 50.00
IB
0.01
10.00
Unrestrained protection limit, multiple of
W1 rated current
I2/I1Ratio
5.0 - 100.0
%
0.1
15.0
Maximum ratio of 2nd harmonic to
fundamental harmonic differential current
I5/I1Ratio
5.0 - 100.0
%
0.1
25.0
Maximum ratio of 5th harmonic to
fundamental harmonic differential current
CrossBlockEn
Off
On
-
-
On
Operation Off/On for cross-block logic
between phases
NegSeqDiffEn
Off
On
-
-
On
Operation Off/On for negative sequence
differential function
IMinNegSeq
0.02 - 0.20
IB
0.01
0.04
Minimum negative sequence current
NegSeqROA
30.0 - 90.0
Deg
0.1
60.0
Operate angle for internal/external
negative sequence fault discriminator
SOTFMode
Off
On
-
-
On
Operation mode for switch onto fault
function
IDiffAlarm
0.05 - 1.00
IB
0.01
0.20
Differential current alarm, multiple of base
current, usually W1 current
tAlarmDelay
0.000 - 60.000
s
0.001
10.000
Time delay for differential current alarm
Table 32:
T3WPDIF Non group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
GlobalBaseSelW1
1 - 6
-
1
1
Selection of one of the Global Base Value
groups, winding 1
GlobalBaseSelW2
1 - 6
-
1
1
Selection of one of the Global Base Value
groups, winding 2
GlobalBaseSelW3
1 - 6
-
1
1
Selection of one of the Global Base Value
groups, winding 3
ConnectTypeW1
WYE (Y)
Delta (D)
-
-
WYE (Y)
Connection type of winding 1: Y-wye or D-
delta
ConnectTypeW2
WYE (Y)
Delta (D)
-
-
WYE (Y)
Connection type of winding 2: Y-wye or D-
delta
Table continues on next page
1MRK 504 135-UEN A
Section 6
Differential protection
85
Technical manual
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