ABB RET 543 - Page 57

Fig. 12 Transformer in block connection with a generator. The transformer terminal RET 543 is used for
overall differential protection. An earthing resistor is recommended for the generator. Generator
protection functions are divided for two REM 543 machine terminals (A and B). The current injec-
tion device REK 510 is used in the rotor earth-fault protection scheme.
gen_blockconn-trafo2
3~
G
MF
REK 510
RET_/3I
RET_/1U
RET_/1U
RET_/1I
REM_/3I (A)
REM_/3I (B)
REM_/2U(A)/3U(B)
REM_/1U (A)
REM_/3I (A)
REM_/1I (A)
RET_/3I
REM/I
0R
(B)
Q
P>
Q
3U> 59
CBFP
Z<
P>
REM 54_ (B)
3
59N
27
U
0
>
3U<
F
64R
50
51
I
OR
>
3I>
62BF
60
f
49G
32
0
U
Q
3I
MCS
TCS
pf
3U
P
R
21G
000
U/f>
24
E
87G3DI>
64SI >
46I >
f
3I
Q
P
TCS
U
R
000
MCS
pf
REM 54_ (A)
CBFP
62BF
f>/f<
81O
81U
X< 40
P> 32
2
E
os
RET 54_
87TN
46I >
2
HV
LV
DI >
0
3 49T
0
I > 51N
CBFP
U >
LV
62BF
50N
59N
I >
HV
0
3I>
LV
51N
50N
50
51
3DI> 87TG
HV
3I>
50
T
O
T
oo
w
0
U
0
I
3I
3I I
TCS
R
51
000
Transformer Terminal RET 541, RET 543, RET 545
1MRS755543
57