ABB REG670 Applications Manual page 309

1MRK 502 071-UEN -
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Application manual
C
stat
IEC11000010 V1 EN
Figure 161: High-resistance generator earthing via a grounded wye-broken delta
transformer
It is also possible to make the injection via VT open delta connection, as shown in
figure 162.
R
N
IEC11000010-3-en.vsd
Section 8
Impedance protection
I
inj
a
+
U
inj
-
b
303