ABB RET 543 - Application Examples

Transformer Terminal RET 541, RET 543, RET 545
1MRS755543
51
Application
examples
Fig. 6 Protection, control and supervision functions of a Yd-connected power transformer, implemented
with RET 543 transformer terminal, REF543 feeder terminal and REA 101 arc protection. Position
indication of the on-load tap changer is used to increase the sensitivity of the differential function of
the transformer. In this example, the voltage controller is not included in the RET 543 transformer
terminal.
Yd transformer
3DI> 87TG
3I
U
TCS
R
513I>
50
51N
50N
I >
0
62BFCBFP
3
49T
513I>
50
HV
LV
HV
HV
62BFCBFP
LV
P
Q
O
T
2
I >
46
w
T
3I
U
Io
CBCM
HV
62BF
REF 54_
CBFP
U >
0
59N
51
50
3I> 3U>
3U<
27
59
3U
TCS
R
3I
RET 54_
P
Q
3I>
&
3I >
2f
68
p>
Q
Q
000
E
REA 101
000
000
REF/3I, REA 101/3I
RET/31
RET/4I
RET/1U
RET/1U
REF/3U
REF/1U
RET/RTD
MF
MF