ABB 615 Series - Page 353

If the current amplitude falls below one percent of the nominal current, the
direction enters the non-directional area.
RCA
Non-operating area
3% nominal
amplitude
Max forward angle
Min forward angle
Min reverse angle
Max reverse angle
70 deg
80 deg
70 deg
80 deg
Forward
area
Backward
area
1% nominal
amplitude
IG
-VG
GUID-2F0D9869-85AD-400A-97EC-8295D06D4F9E V1 EN
Figure 163: Operating characteristic for phase angle classic 80
2
3
4
5
6
7
8
9
10
/ % of
0 90453015 7560-90 -45 -30 -15-75 -60
Min forward angle
1
80 deg
70 deg
Forward
area
Non-
operating
area
3% of
1% of
0
I
n
I
n
I
n
I
GUID-49D23ADF-4DA0-4F7A-8020-757F32928E60-ANSI V1 EN
Figure 164: Phase angle classic 80 amplitude
1MAC059074-MB A Section 4
Protection functions
615 series ANSI 347
Technical Manual