ABB REG316 4 Series Operating Instructions Manual page 285

REG 316*4 1MRB520049-Uen / Rev. F
R
Generator
Grounding
transformator
Fig. 3.5.24.2 Stator ground fault protection with secondary
injection at the generator star-point
R S
Generator
Fig. 3.5.24.3
Wiring diagram for secondary injection of the stator
(grounding transformer at the generator terminals)
S T
N1 N2
T
R'Es
N1
N2
R'Ps
Grounding
transformator
ABB Switzerland Ltd
Voltage
transformer
N'12 N'11
R'Es
R'Ps
Uis
Injection voltage
Voltage
transformer
N'12 N'11
Uis
Injection voltage
Us
Us
3-247