ABB REG670 - Signals; Function Block

Directional operation can be combined together with corresponding communication
logic in permissive or blocking teleprotection scheme. The same logic as for
directional zero sequence current can be used. Current reversal and weak-end infeed
functionality are available.
8.5.3 Function block
NS4PTOC
I3P*
I3PDIR*
U3P*
BLOCK
BLKTR
BLKST1
BLKST2
BLKST3
BLKST4
ENMULT1
ENMULT2
ENMULT3
ENMULT4
TRIP
TR1
TR2
TR3
TR4
START
ST1
ST2
ST3
ST4
STFW
STRV
IEC10000054-2-en.vsd
IEC10000054 V2 EN
Figure 170: NS4PTOC function block
8.5.4 Signals
Table 179: NS4PTOC Input signals
Name
Type Default Description
I3P GROUP
SIGNAL
- Group connection for operate current
I3PDIR GROUP
SIGNAL
- Group connection for directional current
U3P GROUP
SIGNAL
- Group connection for polarizing voltage
BLOCK BOOLEAN 0 General block
BLKTR BOOLEAN 0 Block of trip
BLKST1 BOOLEAN 0 Block of step 1 (Start and trip)
BLKST2 BOOLEAN 0 Block of step 2 (Start and trip)
BLKST3 BOOLEAN 0 Block of step 3 (Start and trip)
BLKST4 BOOLEAN 0 Block of step 4 (Start and trip)
ENMULT1 BOOLEAN 0 When activated, the current multiplier is in use for
step1
ENMULT2 BOOLEAN 0 When activated, the current multiplier is in use for
step2
ENMULT3 BOOLEAN 0 When activated, the current multiplier is in use for
step3
ENMULT4 BOOLEAN 0 When activated, the current multiplier is in use for
step4
1MRK502052-UEN B Section 8
Current protection
375
Technical manual