ABB RET670 - Page 123

Table 33: CT input channels used for the HV side CTs
Setting parameter Selected value for both solution 1
(wye connected CTs)
Selected value for both Solution 2
(delta connected CTs)
CTprim 200
200
115
3
=
EQUATION1891 V1 EN (Equation 32)
CTsec 1 1
CT_WyePoint FromObject ToObject
To compensate for delta connected CTs, see equation 32.
6. Enter the following settings for all three CT input channels used for the LV side CTs
Table 34: CT input channels used for the LV side CTs
Setting parameter Selected value for both Solution 1
(wye connected)
Selected value for both Solution 2
(delta connected)
CTprim 500
500
289
3
=
EQUATION1892 V1 EN (Equation 33)
CTsec 5 5
CT_WyePoint ToObject ToObject
To compensate for delta connected CTs, see equation 33.
7. Enter the following values for the general settings of the differential protection
function, see table 35
Table 35: General settings of the differential protection function
Setting parameter
Selected value for both Solution 1
(wye connected)
Selected value for both Solution 2
(delta connected)
RatedVoltageW1 110 kV 110 kV
RatedVoltageW2 36.75 kV 36.75 kV
RatedCurrentW1 165 A 165 A
RatedCurrentW2 495 A 495 A
ConnectTypeW1 WYE (Y) WYE (Y)
ConnectTypeW2 wye=y wye=y
ClockNumberW2 0 [0 deg] 0 [0 deg]
Table continues on next page
1MRK504116-UUS C Section 3
IED application
117
Application manual