ABB REG670 Applications Manual page 147

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