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G
1
U>
2
U
R
U
U
T
S
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
7
Ferroresonance damping resistor R
8
Interposing v.t.
9
Voltage relay for the busbar ground fault protection
Fig. 4.17
4-38
REG 316*4 1MRB520049-Uen / Rev. B
3
P>
4
U
U
TR
SR
e
Three-phase diagram and vector diagram of the
protection
5
6
7
8
U>
U
TR
U
U
SR
p
T
9
HEST 965039 FL
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