ABB RELION REX640 Technical Manual page 435

1MRS759142 C
REX640
Technical Manual
GUID-7CA4C8EE-0CA2-4290-9DF2-1FA5306E0774 V1 EN
Figure 229: Configurable operating sectors in phase angle characteristic
Table 484: 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 reverse
sectors, that is, the sectors are overlapping.
If the Allow Non Dir setting is "False", the directional operation (forward, reverse) 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 Min operate current and Min operate voltage. In case of low
magnitudes, the FAULT_DIR and DIRECTION outputs are set to 0 = unknown,
except when the Allow non dir setting is "True". In that case, the function is allowed
Protection functions
The value for DIRECTION
0 = unknown
1= forward
2 = backward
3 = both
Section 4
429