ABB RED650 - Page 140

IBase. However, if current transformer saturation is detected, this criterion is
changed to residual voltage (3U0) exceeding 5% of UBase/sqrt(3) instead.
DirModeZ3-5
Forward
Reverse
TRUE (1)
FW(Ln & LmLn)
RV(Ln & LmLn)
FW(Ln & LmLn)
FW(Ln & LmLn)
RV(Ln & LmLn)
IEC12000137-2-en.vsd
IEC12000137 V3 EN-US
Figure 54: Connection of directional signals to Zones
Section 7 1MRK 505 394-UEN A
Impedance protection
134 Line differential protection RED650 2.2 IEC
Technical manual