ABB REG670 - Page 147

Table 15: CT input channels used for the LV side CTs
Setting parameter Selected value for both solutions
CTprim 800
CTsec 5
CTStarPoint ToObject
5. Enter the following settings for all three CT input channels used for the HV side
CTs, see table
16.
Table 16: CT input channels used for the HV side CTs
Setting parameter Selected value for solution 1 (star
connected CT)
Selected value for solution 2
(delta connected CT)
CTprim 300
300
173
3
=
EQUATION1888 V1 EN (Equation 17)
CTsec
5 5
CTStarPoint From Object ToObject
To compensate for delta connected CTs, see equation 17.
6. Enter the following values for the general settings of the Transformer differential
protection function, see table 17.
Table 17: General settings of the differential protection function
Setting parameter
Select value for solution 1 (star
connected CT)
Selected value for solution 2
(delta connected CT)
GlobalBaseSelW1 CTPrim / GlobalBaseSelW1 (CTPrim /
GlobalBaseSelW1) / sqrt(3)
GlobalBaseSelW2 CTPrim / GlobalBaseSelW2 (CTPrim /
GlobalBaseSelW2) / sqrt(3)
GlobalBaseSelW3 CTPrim / GlobalBaseSelW3 (CTPrim /
GlobalBaseSelW3) / sqrt(3)
ConnectTypeW1 STAR (Y) STAR (Y)
ConnectTypeW2 delta=d
star=y
1)
ClockNumberW2 1 [30 deg lag]
0 [0 deg]
1)
ZSCurrSubtrW1 On
Off
2)
ZSCurrSubtrW2 Off Off
TconfigForW1 No No
TconfigForW2 No No
Table continues on next page
1MRK 502 071-UEN - Section 7
Differential protection
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062 141
Application manual