Table 118:
SDEPSDE (67N) Non group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
GlobalBaseSel
1 - 12
-
1
1
Global base selection for function groups
Table 119:
SDEPSDE (67N) Non group settings (advanced)
Name
Values (Range)
Unit
Step
Default
Description
RotResV
0 deg
180 deg
-
-
180 deg
Setting for rotating polarizing quantity if
necessary
8.4.6
Monitored data
Table 120:
SDEPSDE (67N) Monitored data
Name
Type
Values (Range)
Unit
Description
INCOSPHI
REAL
-
A
Magnitude of residual current
along the polarizing quantity
3I0cos(Fi-RCA)
IN
REAL
-
A
Measured magnitude of the
residual current 3I0
VN
REAL
-
kV
Measured magnitude of the
residual voltage 3V0
SN
REAL
-
MVA
Measured magnitude of
residual power 3I03V0cos(Fi-
RCA)
ANG FI-RCA
REAL
-
deg
Angle between 3V0 and 3I0
minus RCA (Fi-RCA)
8.4.7
Operation principle
8.4.7.1
Function inputs
The function is using phasors of the residual current and voltage. Group signals I3P and
V3P containing phasors of residual current and voltage are taken from pre-processor
blocks.
The sensitive directional ground fault protection has the following sub-functions
included:
Directional residual current protection measuring 3I
0
·cos φ
φ is defined as the angle between the residual current 3I
0
and the reference voltage (|
φ=ang(3I
0
)-ang(V
ref
)|). The reference voltage (Vref) is the polarizing quantity which is
used for directionality and is defined as Vref = -3V
0
e
—jRCADir
, that is -3V
0
inversely
Section 8
1MRK 511 365-UUS A
Current protection
232
Phasor measurement unit RES670 2.1 ANSI
Technical manual
Содержание Relion 670 Series RES670
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