ABB Relion 670 series - Page 430

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