ABB Remote I/O RIO600 Installation And Commissioning Manual page 130

Section 6
Commissioning
122
defined with setting Tilt angle to compensate the measurement errors of residual
current and voltage measurement.
REVERSE
REVERSE
GUID-540336CC-0720-4F42-A59F-E99FC96508CE V1 EN
Figure 71: Directional characteristic of the MFAPSDE function
In case of unearthed network operation, adequate tilt angle must be
allowed to ensure dependable operation of MFAPSDE.
In Figure 71, phasors 1...4 demonstrate the behavior of the directional phasor in
different network fault conditions.
• Phasor 1 depicts the direction of accumulated sum admittance phasor in case of
an earth fault outside the protected feeder (assuming that the admittance of the
protected feeder is dominantly capacitive). The result is valid regardless of the
fault type (low ohmic, high(er) ohmic, permanent or intermittent). In case
+90 deg
Im(Yo)

_
Y
os um_CPS
_
_
Y
os um_CPS
Y
os um_CPS


Tilt
angle
-90 deg
1MRS757488 H
+45 deg
FORWARD
0 deg
_
Y
Re(Yo)
os um_CPS

FORWARD
Installation and Commissioning Manual
RIO600