Table 436: 87T Group settings (Advanced)
Parameter Values (Range) Unit Step Default Description
Enable high set 0=False
1=True
1=True Enable high set stage
Slope section 3 10...100 % 1 100 Slope of the third line of the operating
characteristics
Harmonic deblock 2.H 0=False
1=True
1=True Selects if the 2. harmonic deblocking is allowed
in case of switch on to a fault (Allow / Do not
allow)
Stop value 5.H
10...50 % 1 35 The ratio of the 5. harmonic to fundamental
component required to remove 5. harmonic
blocking
Harmonic deblock 5.H
0=False
1=True
0=False Selects if the 5. harmonic deblocking is allowed
in case of severe overvoltage situation (Allow /
Do not allow)
Table 437: 87T Non group settings (Basic)
Parameter Values (Range) Unit Step Default Description
Operation 1=enable
5=disable
1=enable Operation Disable / Enable
CT connection type 1=Type 1
2=Type 2
1=Type 1 CT connection type. Determined by the
directions of the connected current
transformers
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)
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: 1 ->
not eliminated, 2-> on HV only, 3 -> on LV only,
4 -> both on HV and LV
CT ratio Cor Wnd 1
0.40...4.00 0.01 1.00 CT ratio correction, winding 1
CT ratio Cor Wnd 2 0.40...4.00 0.01 1.00 CT ratio correction, winding 2
1MAC059074-MB A Section 4
Protection functions
615 series ANSI 533
Technical Manual
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