ABB REF 543 - Page 57

Feeder Terminal REF 541, REF 543, REF 545.
1MRS750443-MBG
57
Fig. 10 REF 54_ feeder terminals used for the protection, control, measurement and supervision functions
of a utility/industrial measurement cubicle (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.
EXMEAS1
3U > 59
f <
81U
MCS
U
0
TCS
000
3U
f
U
0
>
59N
R
3U < 27
3U > 59
f <
81U
MCS
U
0
TCS
000
3U
f
U
0
>
59N
R
3U < 27
REF 54_
REF 54_