Parameter Values (Range) Unit Step Default Description
Slope section 3 10...200 % 1 150 Slope of the third line of the operating
characteristics
Operating curve type 1=ANSI Ext Inv
3=ANSI Norm Inv
5=ANSI DT
9=IEC Norm Inv
10=IEC Very Inv
12=IEC Ext Inv
15=IEC DT
15=IEC DT Selection of time delay curve for stabilized
stage
Trip delay time 45...200000 ms 1 45 Trip delay time
Table 427: 87L Non group settings (Basic)
Parameter Values (Range) Unit Step Default Description
Operation 1=on
4=test/blocked
5=off
1=on Operation Disable / Enable
Winding selection 1=Not in use
2=Winding 1
3=Winding 2
1=Not in use IED location respect to transformer, HV
(Winding 1) side or LV (Winding 2) side
Winding 1 type 1=Y
2=YN
3=D
4=Z
5=ZN
1=Y Connection of the HV side windings.
Determined by the transformer connection
group (e.g. Dyn11 ->"D")
Winding 2 type
1=y
2=yn
3=d
4=z
5=zn
1=y Connection of the LV side windings.
Determined by the transformer connection
group (e.g. Dyn11 ->"yn")
Clock number
0=Clk Num 0
1=Clk Num 1
2=Clk Num 2
4=Clk Num 4
5=Clk Num 5
6=Clk Num 6
7=Clk Num 7
8=Clk Num 8
10=Clk Num 10
11=Clk Num 11
0=Clk Num 0 Setting the phase shift between HV and LV with
clock number for connection group
compensation (e.g. Dyn11 -> 11)
CT ratio correction
0.200...5.000 0.001 1.000 Local phase current transformer ratio
correction
CT connection type 1=Type 1
2=Type 2
1=Type 1 CT connection type. Determined by the
directions of the connected current
transformers.
Zro A elimination
1=Not eliminated
2=Winding 1
3=Winding 2
4=Winding 1 and 2
1=Not eliminated Elimination of the zero-sequence current
Restraint mode 1=None
2=Harmonic2
1=None Selects what restraint modes are in use
1MAC059074-MB A Section 4
Protection functions
615 series ANSI 497
Technical Manual
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