Table 25:
T2WPDIF Output signals
Name
Type
Description
TRIP
BOOLEAN
General trip signal
TRIPRES
BOOLEAN
Start signal from restrained differential protection
TRIPUNRE
BOOLEAN
Start signal from unrestrained differential
protection
TRNSUNR
BOOLEAN
Start signal from unrestrained negative sequence
differential protection
TRNSSENS
BOOLEAN
Start signal from sensitive negative sequence
differential protection
START
BOOLEAN
General start signal
STL1
BOOLEAN
Start signal from phase L1
STL2
BOOLEAN
Start signal from phase L2
STL3
BOOLEAN
Start signal from phase L3
BLK2H
BOOLEAN
General second harmonic block signal
BLK5H
BOOLEAN
General fifth harmonic block signal
BLKWAV
BOOLEAN
General block signal from waveform criteria
IDALARM
BOOLEAN
General alarm for sustained differential currents
IDL1MAG
REAL
Magnitude of fundamental frequency differential
current, phase L1
IDL2MAG
REAL
Magnitude of fundamental frequency differential
current, phase L2
IDL3MAG
REAL
Magnitude of fundamental frequency differential
current, phase L3
IBIAS
REAL
Magnitude of the bias current, which is common to
all phases
IDNSMAG
REAL
Magnitude of the negative sequence differential
current
6.1.2.4
Settings
Table 26:
T2WPDIF Group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
Operation
Off
On
-
-
Off
Operation Off / On
IdMin
0.10 - 0.60
IB
0.01
0.30
Section 1 sensitivity current, usually W1
current
EndSection1
0.20 - 1.50
IB
0.01
1.25
End of section 1, multiple of W1 rated
current
EndSection2
1.00 - 10.00
IB
0.01
3.00
End of section 2, multiple of W1 rated
current
SlopeSection2
10.0 - 50.0
%
0.1
40.0
Slope in section 2 of operate-restrain
characteristics
SlopeSection3
30.0 - 100.0
%
0.1
80.0
Slope in section 3 of operate-restrain
characteristics
Table continues on next page
1MRK 504 135-UEN A
Section 6
Differential protection
81
Technical manual
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