Name Type Description
BLK2H_C BOOLEAN Second harmonic block signal, phase C
BLK5H BOOLEAN Common fifth harmonic block signal from any phase
BLK5H_A BOOLEAN Fifth harmonic block signal, phase A
BLK5H_B BOOLEAN Fifth harmonic block signal, phase B
BLK5H_C BOOLEAN Fifth harmonic block signal, phase C
BLKWAV BOOLEAN Common block signal, waveform criterion, from any phase
BLKWAV_A BOOLEAN Block signal, waveform criterion, phase A
BLKWAV_B BOOLEAN Block signal, waveform criterion, phase B
BLKWAV_C BOOLEAN Block signal, waveform criterion, phase C
IDALARM BOOLEAN Alarm for sustained diff currents in all three phases
OPENCT BOOLEAN An open CT was detected
OPENCTAL BOOLEAN Open CT Alarm output signal. Issued after a delay ...
ID_A REAL Value of the instantaneous differential current, phase A
ID_B REAL Value of the instantaneous differential current, phase B
ID_C REAL Value of the instantaneous differential current, phase C
IDMAG_A REAL Magnitude of fundamental frequency differential current, phase A
IDMAG_B REAL Magnitude of fundamental frequency differential current, phase B
IDMAG_C REAL Magnitude of fundamental frequency differential current, phase C
IBIAS REAL Magnitude of the bias current, which is common to all phases
IDMAG_NS REAL Magnitude of the negative sequence differential current
6.1.5 Settings
PID-6623-SETTINGS v2
Table 49: T2WPDIF (87T) Group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Operation Disabled/Enabled
SOTFMode Disabled
Enabled
- - Enabled Operation mode for switch onto fault
tAlarmDelay 0.000 - 60.000 s 0.001 10.000 Time delay for diff currents alarm level
IDiffAlarm 0.05 - 1.00 IB 0.01 0.20 Dif. cur. alarm, multiple of base curr,
usually W1 curr.
IdMin 0.05 - 0.60 IB 0.01 0.30 Section1 sensitivity, multi. of base curr,
usually W1 curr.
IdUnre 1.00 - 100.00 IB 0.01 10.00 Unrestrained protection limit, multiple of
Winding 1 rated current
CrossBlockEn Disabled
Enabled
- - Enabled Operation Off/On for cross-block logic
between phases
Table continues on next page
Section 6 1MRK 502 066-UUS B
Differential protection
112
Technical manual
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