Table of Contents
Advertisement
A Appendix
A (L1)
B (L2)
C (L3)
Figure A-28 Block Connection with Isolated Starpoint
Connection on each side to three current transformers and three voltage transformers (phase-to-earth volt-
ages). Differential protection function only used for the generator;
Detection of displacement voltage at a broken delta winding (e–n).
490
ANSI
52
Yd5
Earthing transformer
with measuring winding
Excitation
R15
R17
R18
R16
e
R13
R
L
n
R14
J7
For 100 % stator
J8
earth fault protection
Divider
3PP1326
V
Exc.
Rotor earth-current
injection
Q1
Q2
Q3
Q4
Q5
Q6
Measuring transducer:
K13 +
- Temperature
K14
injection
- or DC voltage
K15 +
injection
K16
7UM62
V
A(L1)
V
B(L2)
V
C(L3)
V
E
I
EE1
I
J1
A(L1)S1
J2
I
J3
B(L2)S1
J4
I
J5
C(L3)S1
J6
K17 +
TD3
K18
Q7
I
EE2
Q8
I
A(L1)S2
I
B(L2)S2
I
C(L3)S2
TD1
TD2
C53000-G1176-C149-3
7UM62 Manual
Advertisement
Table of Contents
