ABB REF 543 - Page 58

Feeder Terminal REF 541, REF 543, REF 545.
1MRS750443-MBG
58
Fig. 11 Protection, control, measurement and supervision functions of a utility/industrial infeeder, imple-
mented with REF 54_ feeder terminals, an REA arc monitoring system and SPACOM differential
relay and voltage regulator (main single-line diagram presentation). The neutral point of the MV
network supplied by the infeeder is earthed via a high resistance.
MF
q
q
p>
EXINFDR4
3I >
&
3I > 50/51
CBFP
* /62
MCS
R
CBCM
TCS
000
0
I
I
0
>
50N/51N
R
000
U
90V
U
3D I >
87T
R
000
CBFP * /62
MCS
R
P
E
CBCM
TCS
000
0
I
3I
3U
3U > 59
CBFP * /62
3I >
50/51
51B
Q
I
0
MF
MF
U
0
>
59N
SYNC 25
I
0
> 50N/51N
3I> 67
REF 54_
SPAU 341
SPAD 346C
REA 101
REF 54_
3I~harm
3U~harm