Table 17: General settings of the differential protection function
Setting parameter Select value for solution 1 (wye
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 WYE (Y) WYE (Y)
ConnectTypeW2 delta=d
wye=y
1)
ClockNumberW2 1 [30 deg lag]
0 [0 deg]
1)
ZSCurrSubtrW1 On
Off
2)
ZSCurrSubtrW2 Off Off
TconfigForW1 No No
TconfigForW2 No No
LocationOLTC1 Not used Not used
Other Parameters Not relevant for this application.
Use default value.
Not relevant for this application.
Use default value.
1)
To compensate for delta connected CTs
2)
Zero-sequence current is already removed by connecting main CTs in delta
Delta-wye connected power transformer without tap charger
SEMOD167854-209 v4
Single line diagrams for two possible solutions for such type of power transformer with
all relevant application data are given in figure 55.
Section 7 1MRK 502 071-UUS A
Differential protection
148 Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Application manual
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