ABB RELION REX640 Technical Manual page 472

Protection functions
Figure 269: Operating characteristic for phase angle 88
Figure 270: Phase angle 88 amplitude ( Directional mode = Forward)
472
Io / % of I
Min forward angle
-90 -75 -60 -45 -30 -15
n
88 deg
100
90
80
70
50
40
30
85 deg
20
10 73 deg
0 15 30 45 60 75
1MRS759142 F
100% of In
20% of In
1% of In
90
REX640
Technical Manual