ABB REF 541 Product Manual page 56

56
Feeder Terminal
M
MF
Fig. 9 An REF 54_ feeder terminal used for the protection, control, measurement and supervision func-
tions of a utility feeder (main single-line diagram presentation). The neutral point of the supplying
network is isolated. The scheme is also fully applicable in high-impedance earthed networks,
where the neutral point is earthed via a high resistance or a Petersen coil.
M
3I >
I >
0
I >
0-0
3I >
2f
DI>
f <
0 I
CBFP
REF 54_
REF 541, REF 543, REF 545.
1MRS750443-MBG
50/51 MCS
67N
TCS
CBCM
51N
68
46 R
81U
P
79
I
0
* /62
E
000
0 I
3I
3U
EXFDR1