ABB Relion 670 Series Technical Reference Manual page 154

Section 5
Differential protection
148
Name Type
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 66: LT6CPDIF (87LT) Input signals
Name Type
I3P1 GROUP
SIGNAL
I3P2 GROUP
SIGNAL
I3P3 GROUP
SIGNAL
I3P4 GROUP
SIGNAL
I3P5 GROUP
SIGNAL
I3P6 GROUP
SIGNAL
Description
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
- Three phase current grp1 samples and DFT values
- Three phase current grp2 samples and DFT values
- Three phase current grp3 samples and DFT values
- Three phase current grp4 samples and DFT values
- Three phase current grp5 samples and DFT values
- Three phase current grp6 samples and DFT values
1MRK505222-UUS C
Technical reference manual