ABB 615 series Technical Manual page 353

1MAC059074-MB A
615 series ANSI
Technical Manual
If the current amplitude falls below one percent of the nominal current, the
direction enters the non-directional area.
Min forward angle
Non-operating area
80 deg
70 deg
Max reverse angle
3% nominal
amplitude
1% nominal
amplitude
GUID-2F0D9869-85AD-400A-97EC-8295D06D4F9E V1 EN
Figure 163: Operating characteristic for phase angle classic 80
Non-
operating
area
-90 -75
GUID-49D23ADF-4DA0-4F7A-8020-757F32928E60-ANSI V1 EN
Figure 164: Phase angle classic 80 amplitude
-VG
RCA
Forward
area
IG
Backward
area
I
I
/ % of
n
0
10
Min forward angle
9
8
Forward
7
area
6
5
4
3
2
1
-60 -45 -30 -15 0 15
Section 4
Protection functions
Max forward angle
Min reverse angle
80 deg
3% of
70 deg
1% of
30 45 60 75 90
70 deg
80 deg
I
n
I
n
347