Name Type Description
IDMAG_A REAL Magnitude of fund. freq. differential current, phase A
IDMAG_B REAL Magnitude of fund. freq. differential current, phase B
IDMAG_C REAL Magnitude of fund. freq. differential current, phase C
IBIAS REAL Magnitude of the bias current, common for phase A,B.C
IDMAG_NS REAL Magnitude of the negative sequence differential current
Table 62: L6CPDIF (87L) Input signals
Name Type Default Description
I3P1 GROUP
SIGNAL
- Three phase current grp1 samples and DFT values
I3P2 GROUP
SIGNAL
- Three phase current grp1 samples and DFT values
I3P3 GROUP
SIGNAL
- Three phase current grp1 samples and DFT values
I3P4 GROUP
SIGNAL
- Three phase current grp1 samples and DFT values
I3P5 GROUP
SIGNAL
- Three phase current grp1 samples and DFT values
I3P6 GROUP
SIGNAL
- Three phase current grp1 samples and DFT values
Table 63: L6CPDIF (87L) Output signals
Name
Type Description
TRIP BOOLEAN Main Trip Signal
TR_A BOOLEAN Trip signal from phase A
TR_B BOOLEAN Trip signal from phase B
TR_C BOOLEAN Trip signal from phase C
TRIPRES BOOLEAN Trip by restrained differential 87L
TRIPUNRE BOOLEAN Trip by unrestrained differential 87H
TRIPENHA BOOLEAN Trip by Enhanced restrainted differential 87LEnhanced
PICKUP BOOLEAN Main Pickup output signal
PU_A BOOLEAN Pickup signal from phase A
PU_B BOOLEAN Pickup signal from phase B
PU_C BOOLEAN Pickup signal from phase C
BLK2H BOOLEAN Block signal due to second harmonic
BLK2H_A BOOLEAN Block signal due to second harmonic phase A
BLK2H_B BOOLEAN Block signal due to second harmonic phase B
Table continues on next page
Section 5 1MRK505222-UUS C
Differential protection
146
Technical reference manual
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