Name
Values (Range)
Unit
Step
Default
Description
ClockNumberW2
0 [0 deg]
1 [30 deg lag]
2 [60 deg lag]
3 [90 deg lag]
4 [120 deg lag]
5 [150 deg lag]
6 [180 deg]
7 [150 deg lead]
8 [120 deg lead]
9 [90 deg lead]
10 [60 deg lead]
11 [30 deg lead]
-
-
0 [0 deg]
Phase displacement between W2 &
W1=HV winding, hour notation
ZSCurrSubtrW1
Off
On
-
-
On
Enable zer. seq. current subtraction for
W1 side, On / Off
ZSCurrSubtrW2
Off
On
-
-
On
Enable zer. seq. current subtraction for
W2 side, On / Off
TconfigForW1
No
Yes
-
-
No
Two CT inputs (T-config.) for winding 1,
YES / NO
CT1RatingW1
1 - 99999
A
1
3000
CT primary rating in A, T-branch 1, on
transf. W1 side
CT2RatingW1
1 - 99999
A
1
3000
CT primary in A, T-branch 2, on transf. W1
side
TconfigForW2
No
Yes
-
-
No
Two CT inputs (T-config.) for winding 2,
YES / NO
CT1RatingW2
1 - 99999
A
1
3000
CT primary rating in A, T-branch 1, on
transf. W2 side
CT2RatingW2
1 - 99999
A
1
3000
CT primary rating in A, T-branch 2, on
transf. W2 side
LocationOLTC1
Not Used
Winding 1 (W1)
Winding 2 (W2)
-
-
Not Used
Transformer winding where OLTC1 is
located
LowTapPosOLTC1
0 - 10
-
1
1
OLTC1 lowest tap position designation
(e.g. 1)
RatedTapOLTC1
1 - 100
-
1
6
OLTC1 rated tap/mid-tap position
designation (e.g. 6)
HighTapPsOLTC1
1 - 100
-
1
11
OLTC1 highest tap position designation
(e.g. 11)
TapHighVoltTC1
1 - 100
-
1
1
OLTC1 end-tap position with winding
highest no-load voltage
StepSizeOLTC1
0.01 - 30.00
%
0.01
1.00
Voltage change per OLTC1 step in
percent of rated voltage
Table 42:
T3WPDIF Group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
tAlarmDelay
0.000 - 60.000
s
0.001
10.000
Time delay for diff currents alarm level
Operation
Off
On
-
-
Off
Operation Off / On
IDiffAlarm
0.05 - 1.00
IB
0.01
0.20
Dif. cur. alarm, multiple of base curr,
usually W1 curr.
Table continues on next page
1MRK502052-UEN B
Section 6
Differential protection
109
Technical manual
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