ABB Relion 670 Series Technical Reference Manual page 340

Section 6
Impedance protection
334
LdAngle
LdAngle
RLdRev
ANSI05000196 V1 EN
Figure 173: Characteristic of load encroachment function
The influence of load encroachment function on the operation characteristic is
dependent on the chosen operation mode of FRPSPDIS (21) function. When output
signal PHSELZ is selected, the characteristic for FRPSPDIS (21) (and also zone
measurement depending on settings) will be reduced by the load encroachment
characteristic, see figure 107.
When output signal PHSELI is selected, the operation characteristic will be as in
figure 106. The reach will in this case be limit by the minimum operation current and
the distance measuring zones.
X
RLdFwd
LdAngle
LdAngle
en05000196_ansi.vsd
1MRK505222-UUS C
R
Technical reference manual