ABB Relion 670 Series Technical Reference Manual page 155

1MRK505222-UUS C
Technical reference manual
Table 67: LT6CPDIF (87LT) Output signals
Name Type
TRIP BOOLEAN
TR_A BOOLEAN
TR_B BOOLEAN
TR_C BOOLEAN
TRIPRES BOOLEAN
TRIPUNRE BOOLEAN
TRIPENHA BOOLEAN
PICKUP BOOLEAN
PU_A BOOLEAN
PU_B BOOLEAN
PU_C BOOLEAN
BLK2H BOOLEAN
BLK2H_A BOOLEAN
BLK2H_B BOOLEAN
BLK2H_C BOOLEAN
BLK5H BOOLEAN
BLK5H_A BOOLEAN
BLK5H_B BOOLEAN
BLK5H_C BOOLEAN
OPENCT BOOLEAN
ALARM BOOLEAN
OPENCTAL BOOLEAN
ID_A REAL
ID_B REAL
ID_C REAL
IDMAG_A REAL
IDMAG_B REAL
IDMAG_C REAL
IBIAS REAL
IDMAG_NS REAL
Table 68: LDLPDIF (87L) Input signals
Name Type
CTFAIL BOOLEAN
OUTSERV BOOLEAN
BLOCK BOOLEAN
Description
Main Trip Signal
Trip signal from phase A
Trip signal from phase B
Trip signal from phase C
Trip by restrained differential 87L
Trip by unrestrained differential 87H
Trip by Enhanced restrainted differential 87LEnhanced
Main Pickup output signal
Pickup signal from phase A
Pickup signal from phase B
Pickup signal from phase C
Block signal due to second harmonic
Block signal due to second harmonic phase A
Block signal due to second harmonic phase B
Block signal due to second harmonic Phase C
Block signal due to fifth harmonic
Block signal due to fifth harmonic phase A
Block signal due to fifth harmonic phase B
Block signal due to fifth harmonic phase C
An open CT was detected
Alarm for sustained differential current
Open CT Alarm output signal. Issued after a delay ...
Instantaneous differential current, phase A
Instantaneous differential current, phase B
Instantaneous differential current, phase C
Magnitude of fund. freq. differential current, phase A
Magnitude of fund. freq. differential current, phase B
Magnitude of fund. freq. differential current, phase C
Magnitude of the bias current, common for phase A,B.C
Magnitude of the negative sequence differential current
Default Description
0 CT failure indication from local CT supervision
0 Input for indicating that the IED is out of service
0 Block of function
Section 5
Differential protection
149