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
Summary of Contents for Relion 670 series
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