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PID-3772-OUTPUTSIGNALS v5
Table 72: REFPDIF (87N) Output signals
Name
Type
Description
TRIP
BOOLEAN
Trip by restricted earth fault protection function
PICKUP
BOOLEAN
Pickup by restricted earth fault protection function
DIR_INT
BOOLEAN
Directional Criteria satisfied for internal fault
BLK2H
BOOLEAN
Block due to 2-nd harmonic
IRES
REAL
Magnitude of fundamental frequency residual current
IN
REAL
Magnitude of fundamental frequency ground current
IBIAS
REAL
Magnitude of the bias current
IDIFF
REAL
Magnitude of fundamental frequency differential current
ANGLE
REAL
Direction angle from zero sequence feature
2NDHARM
REAL
Second harmonic ratio
6.4.5
Settings
IP12660-1 v2
PID-3772-SETTINGS v5
Table 73: REFPDIF (87N) Group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
Operation
Disabled
Enabled
-
-
Disabled
Operation Disabled/Enabled
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 74: REFPDIF (87N) 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 75: REFPDIF (87N) 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
Section 6
1MRK 502 066-UUS B
Differential protection
168
Technical manual
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