ABB RELION 620 Series Technical Manual page 458

Section 4
Protection functions
Table 347: 87T3 Non group settings
Parameter Values (Range)
Operation 1=enable
5=disable
Current group 3 type 1=Not in use
2=Winding 3
3=Wnd 1 restraint
4=Wnd 2 restraint
CT connection 1-2 1=Type 1
2=Type 2
CT connection 1-3 1=Type 1
2=Type 2
Phase Ref winding 2=Winding 1
3=Winding 2
4=Winding 3
Zro A elimination 1=Not eliminated
2=Winding 1
3=Winding 2
4=Winding 1 and 2
5=Winding 3
6=Winding 1 and 3
7=Winding 2 and 3
8=Winding 1, 2, 3
Phase shift Wnd 1-2 0.0...359.9
Phase shift Wnd 1-3 0.0...359.9
Min winding tap -36...36
Max winding tap -36...36
Tap nominal -36...36
Tapped winding 1=Not in use
2=Winding 1
3=Winding 2
4=Winding 3
Step of tap 0.60...9.00
CT ratio Cor Wnd 1 0.20...5.00
CT ratio Cor Wnd 2 0.20...5.00
CT ratio Cor 3 0.20...5.00
452
Unit Step Default
1=enable
2=Winding 3
1=Type 1
1=Type 1
2=Winding 1
1=Not eliminated
deg 0.1 0.0
deg 0.1 0.0
1 36
1 0
1 18
1=Not in use
% 0.01 1.50
0.01 1.00
0.01 1.00
0.01 1.00
1MAC504801-IB E
Description
Operation Disable/ Enable
Type of the third set/group of current inputs
CT connection type consideration between
current groups 1 and 2
CT connection type consideration between
current groups 1 and 3
Reference winding for vector group matching
Elimination of the zero-sequence current
Setting the phase shift between winding 1 and
2 in degrees
Setting the phase shift between winding 1 and
3 in degrees
The tap position number resulting the minimum
number of effective winding turns on the side of
the transformer where the tap changer is.
The tap position number resulting the
maximum number of effective winding turns on
the side of the transformer where the tap
changer is.
The nominal position of the tap changer
resulting the default transformation ratio of the
transformer (as if there was no tap changer)
The winding where the tap changer is
connected to
The percentage change in voltage
corresponding one step of the tap changer
CT ratio correction, winding 1
CT ratio correction, winding 2
CT ratio correction, current group 3
Technical Manual
620 series ANSI