ABB REG316 4 Series - Page 285

REG 316*4 1MRB520049-Uen / Rev. F ABB Switzerland Ltd
3-247
R'Es
R'Ps
Uis
Generator
Us
N'12 N'11
RST
N1
N2
Grounding
transformator
Voltage
Injection voltage
transformer
Fig. 3.5.24.2 Stator ground fault protection with secondary
injection at the generator star-point
R'Es
R'Ps
Uis
Generato
r
Us
N'12 N'11
R
ST
N1
N2
Groundin
g
transformato
r
Volta
g
e
In
j
ection volta
g
e
transforme
r
Fig. 3.5.24.3 Wiring diagram for secondary injection of the stator
(grounding transformer at the generator terminals)