Hitachi Relion 670 Series Applications Manual page 88
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- Applications manual (354 pages) ,
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Section 6
Differential protection
PhSelW2=L1
InvW2Curr=No
Then the internal calculations will be:
I
%
Diff
1
I
%
Bias
1
IECEQUATION205 V2 EN-US
The phase selection settings for the second instance of the T1PPDIF function shall be:
PhSelW1=(L1-L2)/2
PhSelW2=L2
InvW2Curr=Yes
Then the internal calculations will be:
I
%
Diff
2
I
%
Bias
2
IECEQUATION206 V2 EN-US
Transformer connection – example 4
132/110kV
U
132kV
V
IEC15000173 V2 EN-US
Figure 37:
The HV currents I
side towards the T1PPDIF function. The LV currents I
currents, respectively, for the winding 2 side towards T1PPDIF function.
To calculate zero sequence current reduction for U, V, R and S phases, see connection example 1.
The phase selection settings for the first instance of the T1PPDIF function shall be:
82
100
I
I
V
U
IDLW1 IDLW2
I
2
BaseW
1
Max IDLW
1 ,
IDLW
2
Max
I
100
IDLW1 IDLW2
I
BaseW
Max IDLW
1 ,
IDLW
2
I
U
I
v
Transformer connection – example 4
and I
shall be connected as IL1 and IL2 currents, respectively, for the winding 1
V
U
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100
I
S
I
BaseW
2
100
I
I
100
V
U
,
I
S
2
I
BaseW
1
BaseW
2
I
I
100
V
U
I
R
2
I
1
BaseW
2
100
I
I
V
U
Max
I
2
BaseW
1
and I
S
1MRK506375-UEN Rev. N
100
,
I
R
I
BaseW
2
GUID-47523478-6D93-47A3-A362-C17FE6EC3DE0 v2
I
R
110kV
I
S
IEC15000173-2-en.vsdx
shall be connected as IL1 and IL2
R
Railway application RER670
(Equation 12)
(Equation 13)
R
S
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