ABB RELION REX640 Technical Manual page 466

Protection functions
Figure 262: Configurable operating sectors in phase angle characteristic
Table 537: Momentary operating direction
Fault direction
Angle between the polarizing and operating
quantity is not in any of the defined sectors.
Angle between the polarizing and operating
quantity is in the forward sector.
Angle between the polarizing and operating
quantity is in the reverse sector.
Angle between the polarizing and operating
quantity is in both the forward and the re-
verse sectors, that is, the sectors are overlap-
ping.
If the
is not allowed when the measured polarizing or operating quantities are invalid,
that is, their magnitude is below the set minimum values. The minimum values
can be defined with the settings
In case of low magnitudes, the FAULT_DIR and DIRECTION outputs are set to
0 = unknown, except when the
function is allowed to operate in the directional mode as non-directional, since the
directional information is invalid.
466
Allow Non Dir setting is "False", the directional operation (forward, reverse)
The value for DIRECTION
0 = unknown
1= forward
2 = backward
3 = both
Min operate current and Min operate voltage .
Allow non dir setting is "True". In that case, the
1MRS759142 F
REX640
Technical Manual