ABB REF 541 Product Manual page 57

Feeder Terminal
3U > 59 MCS
3U < 27 TCS
U > 59N
0
f < 81U
U
REF 54_
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.
000
3U >
3U <
U
R
3U
0
f
REF 54_
REF 541, REF 543, REF 545.
1MRS750443-MBG
59 MCS
27 TCS
>
59N
0
f <
81U R
U
0
000
3U
f
EXMEAS1
57