ABB Relion 670 Series Applications Manual page 528

Section 18
Monitoring
Table 78:
Setting parameter
CTprim
CTsec
CTStarPoint
6. Enter the values for the general settings of the PTRSTHR function as shown in
Table 79:
Setting parameter
ConnTypeW1
ConnTypeW2
ClockNumberW2
ZSCurrCor
OLTCWinding
1) To compensate for delta connected CTs
2) Zero-sequence current is removed by connecting main CTs in delta
Example 2: Delta-star connected power transformer without tap charger
Single line diagrams for two possible solutions for such type of power transformer with all
relevant application data is given in
522
HV side CTs input channels
Selected value for solution 1 (star
connected CT)
300
5
FromObject
Through fault monitoring function general settings
Select value for solution 1 (star
connected CT)
WYE (Y)
Delta
1 [30 deg lag]
On
Not in use
Figure
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254.
1MRK 511 401-UEN Rev. K
Selected value for solution 2
(delta connected CT)
300
=
173
3
EQUATION1888 V1 EN-US
(To compensate for delta
connected CTs)
5
ToObject
Table
Selected value for solution 2
(delta connected CT)
WYE (Y)
1)
WYE (Y)
1)
0 [0 deg]
2)
Off
Not in use
GUID-0E5F0588-DB5F-4B6E-ADE2-8190D5D9AA99 v1
Bay control REC670
Application manual
79.