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Table 238:
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 PICKUP output is active.
Self-polarizing as polarizing method
Table 239:
Equations for calculating angle difference for self-polarizing method
Faulted
phases
Used fault
current
Used
polarizing
voltage
Angle difference
A
I
A
V
A
ANGLE
A
V
I
A
A
RCA
_
(
) -
(
) -
=
ϕ
ϕ
ϕ
GUID-97073FAF-B617-4ECD-A4E9-752AFA1F7B89-ANSI V1 EN
B
I
B
V
B
ANGLE
B
V
I
B
B
RCA
_
(
) -
(
) -
=
ϕ
ϕ
ϕ
GUID-624E8145-C8F3-4831-A45C-AD47D4A77A83-ANSI V1 EN
C
I
C
V
C
ANGLE
C
V
I
C
C
RCA
_
(
) -
(
) -
=
ϕ
ϕ
ϕ
GUID-7E8BA4E2-4CAE-453C-ADEA-D0BF05EE3ED8-ANSI V1 EN
A - B
I
A
- I
B
V
AB
ANGLE
A
V
I
I
AB
A
B
RCA
_
(
) -
(
-
) -
=
ϕ
ϕ
ϕ
GUID-90E82618-DEB6-4949-A968-C2FE034FBE79-ANSI V1 EN
B - C
I
B
- I
C
V
BC
ANGLE
B
V
I
I
BC
B
C
RCA
_
(
) -
(
-
) -
=
ϕ
ϕ
ϕ
GUID-CC92DF0C-402E-4FAE-AC8A-16C35594ED9F-ANSI V1 EN
C - A
I
C
- I
A
V
CA
ANGLE
C
V
I
I
CA
C
A
RCA
_
(
) -
(
-
) -
=
ϕ
ϕ
ϕ
GUID-475F1BB1-9A6F-4A5B-8FFC-7FA14117537D-ANSI V1 EN
In an example case of the phasors in a single-phase ground fault where the faulted phase
is phase A, the angle difference between the polarizing quantity V
A
and operating quantity
I
A
is marked as φ. In the self-polarization method, there is no need to rotate the polarizing
quantity.
Section 4
1MAC059074-MB A
Protection functions
240
615 series ANSI
Technical Manual
Содержание Relion 615 series
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