ABB RELION REX640 Technical Manual page 440

Section 4
Protection functions
434
GUID-83DB90DD-474D-4D97-B2B6-C170AEE253AC V1 EN
Figure 234: Operating characteristic for phase angle 80
Non-
operating
zone
-90 -75
GUID-3DE57C08-50B8-437F-89F8-CAB6AC1C0AA1 V1 EN
Figure 235: Phase angle 80 amplitude (Directional mode = Forward)
Phase angle 88
The operation criterion phase angle 88 is selected with the Operation mode setting
using the value "Phase angle 88".
Io / % of I
n
10
Min forward angle
9
8
7
6
Operating zone
4
3
2
1
-60 -45 -30 -15 0 15
1MRS759142 C
80 deg
3% of In
70 deg
1% of In
30 45 60 75 90
Technical Manual
REX640