ABB RELION 620 Series Technical Manual page 226

Section 4
Protection functions
220
Min forward angle
Non-operating area
80 deg
70 deg
Max reverse angle
3% nominal
amplitude
1% nominal
amplitude
GUID-EFC9438D-9169-4733-9BE9-6B343F37001A-ANSI V1 EN
Figure 100: Operating characteristic for phase angle classic 80
Non-
operating
area
-90 -75
GUID-49D23ADF-4DA0-4F7A-8020-757F32928E60-ANSI V1 EN
Figure 101: Phase angle classic 80 amplitude
Phase angle 88
The operation criterion phase angle 88 is selected with the Operation mode setting using
the value "Phase angle 88".
-V
0
RCA
Forward
area
I
0
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
1MAC504801-IB E
Max forward angle
Min reverse angle
80 deg
3% of
70 deg
1% of
30 45 60 75 90
620 series ANSI
Technical Manual
70 deg
80 deg
I
n
I
n