ABB RELION 620 Series Technical Manual page 177

1MAC504801-IB E
620 series ANSI
Technical Manual
GUID-18902907-5666-4AB6-80FD-BE875DFCBBD6-ANSI V1 EN
Figure 74: Configurable operating sectors
Table 118: Momentary per phase direction value for monitored data view
Criterion for per phase direction information
The ANGLE_X is not in any of the defined sectors, or
the direction cannot be defined due too low
amplitude
The ANGLE_X is in the forward sector
The ANGLE_X is in the reverse sector
(The ANGLE_X is in both forward and reverse
sectors, that is, when the sectors are overlapping)
Protection functions
The value for DIR_A/_B/_C
0 = unknown
1 = forward
2 = backward
3 = both
Section 4
171