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Signal
Description
IN
Magnitude of fundamental frequency neutral current
IBIAS
Magnitude of the bias current
IDIFF
Magnitude of fundamental frequency differential current
ANGLE
Direction angle from zero sequence feature
I2RATIO
Second harmonic ratio
6.2.5
Settings
Table 33:
Basic general settings for the function REFPDIF (REF1-)
Parameter
Range
Step
Default
Unit
Description
GlobalBaseSel
1 - 6
1
1
-
Selection of one of the
Global Base Value groups
Table 34:
Basic parameter group settings for the function REFPDIF (REF1-)
Parameter
Range
Step
Default
Unit
Description
Operation
Off
On
-
Off
-
Operation Off / On
IdMin
4.0 - 100.0
0.1
10.0
%IB
Maximum sensitivity in %
of IBase
Table 35:
Advanced parameter group settings for the function REFPDIF (REF1-)
Parameter
Range
Step
Default
Unit
Description
ROA
60 - 90
1
60
Deg
Relay operate angle for
zero sequence directional
feature
6.2.6
Monitored data
Table 36:
REFPDIF (87N) Monitored data
Name
Type
Values (Range)
Unit
Description
IRES
REAL
-
A
Magnitude of fundamental
frequency residual current
IN
REAL
-
A
Magnitude of fundamental
frequency neutral current
IBIAS
REAL
-
A
Magnitude of the bias current
Table continues on next page
Section 6
1MRK 502 048-UUS A
Differential protection
120
Technical manual
Summary of Contents for 650 series
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