ABB REG316 4 Series - Page 436

ABB Switzerland Ltd REG 316*4 1MRB520049-Uen / Rev. B
4-38
U
R
U
T
U
S
U
TR
U
SR
U
TR
U
SR
U
HEST 965039 FL
T
G
3
5
6
4
9
U>
2
U>
1
P>
78
Legend:
1 Generator star-point v.t.
2 Start-up scheme v.t.
3 3 neutral c.t’s for the generator ground fault current
4 Power relay for the generator ground fault protection
5 Grounding transformer
6 Grounding resistor R
e
7 Ferroresonance damping resistor R
p
8 Interposing v.t.
9 Voltage relay for the busbar ground fault protection
Fig. 4.17 Three-phase diagram and vector diagram of the
protection