ABB RER670 Applications Manual page 93

1MRK 506 375-UEN A
Railway application RER670 2.2 IEC
Application manual
InvW2Curr=No
Then the internal calculations will be:
  100
  
I % IDLW1 IDLW2
Diff 1
I
BaseW

 

I % Max IDLW 1 , IDLW 2
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:
  100
  
I % IDLW1 IDLW2
Diff 2
I
BaseW

 

I % Max IDLW 1 , IDLW 2
Bias 2
IECEQUATION204 V2 EN-US
Transformer connection – example 3
132/66kV
I
U
U
132kV
I
v
V
IEC15000172 V2 EN-US
Figure 34: Transformer connection – example 3
The HV currents I and I
V
for the winding 1 side towards the T1PPDIF function. The LV currents I
shall be connected as IL1 and IL2 currents, respectively, for the winding 2 side
towards the T1PPDIF function.
100
  
I I
V S
I
1 BaseW 2
 
 

100 100
  
 
Max I , I
V S
 
 I I 
BaseW 1 BaseW 2
100
  
I I
U S
I
1 BaseW 2




100 100
  

Max I , I
U S

I I

BaseW 1 BaseW 2
shall be connected as IL1 and IL2 currents, respectively,
U
Section 6
Differential protection





GUID-945C3857-BE28-484D-B68F-7C9C3BB05441 v2
I
R
I
S
IEC15000172-2-en.vsdx
(Equation 10)
(Equation 11)
R
66kV
S
and I
S R
87