Table 62:
REFPDIF Output signals
Name
Type
Description
TRIP
BOOLEAN
Trip by restricted earth fault protection function
START
BOOLEAN
Start by restricted earth fault protection function
DIROK
BOOLEAN
Directional Criteria has operated for internal fault
BLK2H
BOOLEAN
Block due to 2-nd harmonic
IRES
REAL
Magnitude of fund. freq. residual current
IN
REAL
Magnitude of fund. freq. neutral current
IBIAS
REAL
Magnitude of the bias current
IDIFF
REAL
Magnitude of fund. freq. differential current
ANGLE
REAL
Direction angle from zerosequence feature
I2RATIO
REAL
Second harmonic ratio
6.4.5
Settings
Table 63:
REFPDIF Group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
Operation
Off
On
-
-
Off
Operation Off / On
IdMin
4.0 - 100.0
%IB
0.1
10.0
Maximum sensitivity in % of IBase
CTFactorPri1
1.0 - 10.0
-
0.1
1.0
CT factor for HV side CT1 (CT1rated/
HVrated current)
CTFactorPri2
1.0 - 10.0
-
0.1
1.0
CT factor for HV side CT2 (CT2rated/
HVrated current)
CTFactorSec1
1.0 - 10.0
-
0.1
1.0
CT factor for MV side CT1 (CT1rated/
MVrated current)
CTFactorSec2
1.0 - 10.0
-
0.1
1.0
CT factor for MV side CT2 (CT2rated/
MVrated current)
Table 64:
REFPDIF Group settings (advanced)
Name
Values (Range)
Unit
Step
Default
Description
ROA
60 - 90
Deg
1
60
Relay operate angle for zero sequence
directional feature
Table 65:
REFPDIF Non group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
GlobalBaseSel
1 - 12
-
1
1
Selection of one of the Global Base Value
groups
1MRK502052-UEN B
Section 6
Differential protection
167
Technical manual
Summary of Contents for Relion REG670
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