Criterion for per phase direction information The value for DIR_A/_B/_C
The ANGLE_X is in the reverse sector 2 = backward
(The ANGLE_X is in both forward and reverse sectors, that is,
when the sectors are overlapping)
3 = both
Table 394: Momentary phase combined direction value for monitored data view
Criterion for phase combined direction information The value for DIRECTION
The direction information (DIR_X) for all phases is unknown 0 = unknown
The direction information (DIR_X) for at least one phase is
forward, none being in reverse
1 = forward
The direction information (DIR_X) for at least one phase is
reverse, none being in forward
2 = backward
The direction information (DIR_X) for some phase is forward
and for some phase is reverse
3 = both
FAULT_DIR gives the detected direction of the fault during fault situations, that is,
when the START output is active.
Self-polarizing as polarizing method
Table 395: Equations for calculating angle difference for self-polarizing method
Faulted
phases
Used
fault
current
Used
polarizi
ng
voltage
Angle difference
A
I
A
U
A
ANGLE A U I
A
A
RCA
_ ( ) - ( ) - =
ϕ ϕ ϕ
(Equation 9)
B
I
B
U
B
ANGLE B U I
B
B
RCA
_ ( ) - ( ) - =
ϕ ϕ ϕ
(Equation 10)
C
I
C
U
C
ANGLE C U I
C
C
RCA
_ ( ) - ( ) - =
ϕ ϕ ϕ
(Equation 11)
A - B I
A
-I
B
U
AB
ANGLE A U I I
AB
A B
RCA
_ ( ) - ( - ) - =
ϕ ϕ ϕ
(Equation 12)
B - C I
B
-I
C
U
BC
ANGLE B U I I
BC
B C
RCA
_ ( ) - ( - ) - =
ϕ ϕ ϕ
(Equation 13)
C - A I
C
-I
A
U
CA
ANGLE C U I I
CA
C A
RCA
_ ( ) - ( - ) - =
ϕ ϕ ϕ
(Equation 14)
Protection functions 1MRS759142 F
352 REX640
Technical Manual
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