Hitachi Relion 670 Series Applications Manual page 87

1MRK506375-UEN Rev. N
PhSelW1=L1
PhSelW2=L1
InvW2Curr=No
Then the internal calculations will be:
 

I %
Diff 1
 

I %
Bias 1
IECEQUATION203 V2 EN-US
The phase selection settings for the second instance of the T1PPDIF function shall be:
PhSelW1=L2
PhSelW2=L1
InvW2Curr=Yes
Then the internal calculations will be:
 

I %
Diff 2
 

I %
Bias 2
IECEQUATION204 V2 EN-US
Transformer connection – example 3
132/66kV
U
V
IEC15000172 V2 EN-US
Figure 36:
The HV currents I
side towards the T1PPDIF function. The LV currents I
currents, respectively, for the winding 2 side towards the T1PPDIF function.
To calculate the zero sequence current reduction for U and V phases, see connection example 1.
The phase selection settings for the first instance of the T1PPDIF function shall be:
PhSelW1=(L1-L2)/2
Railway application RER670
Application manual
100 100
   
IDLW1 IDLW2 I
V
I I
BaseW 1 BaseW


 


Max IDLW 1 , IDLW 2 Max

I

100
   
IDLW1 IDLW2 I
U
I I
BaseW 1


 


Max IDLW 1 , IDLW 2 Max

 I
I
U
132kV
I
v
Transformer connection – example 3
and I shall be connected as IL1 and IL2 currents, respectively, for the winding 1
V U
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
I
S
2


100 100
 

I , I
V S

I

BaseW 1 BaseW 2
100

I
S
BaseW 2



100 100
 

I , I
U S

I 
BaseW 1 BaseW 2
and I
S
GUID-945C3857-BE28-484D-B68F-7C9C3BB05441 v2
I
R
66kV
I
S
S
IEC15000172-2-en.vsdx
shall be connected as IL1 and IL2
R
Section 6
Differential protection
(Equation 10)
(Equation 11)
R
81