ABB RELION 670 Series Technical Manual page 430

Section 7
Impedance protection
C
stat
ANSI11000010 V1 EN-US
Figure 227: High-resistance generator grounding via a grounded wye-broken delta
It is also possible to make the injection via VT open delta connection, as shown in figure 228.
424
R
transformer
I
inj
a
+
N
V
inj
-
b
ANSI11000010_1_en.vsd
1MRK 502 066-UUS B
Technical manual