ABB RELION 620 Series Technical Manual page 228

Section 4
Protection functions
222
Min forward angle
Non-operating area
88 deg
Max reverse angle
1% nominal
amplitude
20% nominal
amplitude
100% nominal
amplitude
GUID-0F0560B7-943E-4CED-A4B8-A561BAE08956-ANSI V1 EN
Figure 102: Operating characteristic for phase angle classic 88
Non-
operating
area
-90 -75
GUID-F9F1619D-E1B5-4650-A5CB-B62A7F6B0A90-ANSI V1 EN
Figure 103: Phase angle classic 88 amplitude
-V
0
RCA
I
0
I I
/ % of
n
0
100
Min forward angle
90
80
Forward
70
area
60
50
40
30
20
10
-60 -45 -30 -15 0 15
1MAC504801-IB E
Max forward angle
88 deg
Min reverse angle
88 deg
100%
of
85 deg
20%
of
73 deg
1% of
30 45 60 75 90
620 series ANSI
Technical Manual
I
n
I
n
I
n