1MAC309294-MB F Section 4
Protection functions
RER620 153
Technical Manual
Figure 65: Configurable operating sectors in phase angle characteristic
Table 169: Momentary operating direction
Directional operation is not allowed (the setting Allow non dir is “False”) when the
measured polarizing or operating quantities are not valid, that is, their magnitude is below
the set minimum values. The minimum values can be defined with the settings Min trip
current and Min trip 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 to operate in the directional mode as
non-directional, since the directional information is invalid.
Fault direction The value for DIRECTION
Angle between the polarizing and operating quantity
is not in any of the defined sectors.
0 = unknown
Angle between the polarizing and operating quantity
is in the forward sector.
1= forward
Angle between the polarizing and operating quantity
is in the reverse sector.
2 = backward
Angle between the polarizing and operating quantity
is in both the forward and the reverse sectors, that
is, the sectors are overlapping.
3 = both
RCA
= 0 deg
Non-operating area
Min forward angle
Min reverse angle
Min operate
current
Max forward angle
Max reverse angle
Forward
area
Backward
area
0
-V
0
I
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