NS4PTOC (4612) can also be used to provide a system backup for example, in the case of the
primary protection being out of service due to communication or voltage transformer circuit
failure.
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
GUID-8EDB8B12-0D86-4F6B-A1FB-F5D0C72AA545 v2
NS4PTOC (46I2)
I3P*
I3PDIR*
V3P*
BL OCK
BL KTR
BL K1
BL K2
BL K3
BL K4
MULTPU1
MULTPU2
MULTPU3
MULTPU4
TRIP
TRST1
TRST2
TRST3
TRST4
PICK UP
PU_ST1
PU_ST2
PU_ST3
PU_ST4
PUFW
PUREV
ANSI10000054-1-en.vsd
ANSI10000054 V1 EN-US
Figure 260: NS4PTOC (4612) function block
8.5.4 Signals
PID-6530-INPUTSIGNALS v3
Table 235: NS4PTOC (46I2) Input signals
Name Type Default Description
I3P GROUP
SIGNAL
- Group connection for operate current
I3PDIR GROUP
SIGNAL
- Group connection for directional current
V3P GROUP
SIGNAL
- Group connection for polarizing voltage
BLOCK BOOLEAN 0 General block
BLKTR BOOLEAN 0 Block of trip
BLK1 BOOLEAN 0 Block of step 1 (Pickup and trip)
BLK2 BOOLEAN 0 Block of step 2 (Pickup and trip)
BLK3 BOOLEAN 0 Block of step 3 (Pickup and trip)
BLK4 BOOLEAN 0 Block of step 4 (Pickup and trip)
MULTPU1 BOOLEAN 0 When activated, the pickup multiplier is in use for step1
MULTPU2 BOOLEAN 0 When activated, the pickup multiplier is in use for step2
MULTPU3 BOOLEAN 0 When activated, the pickup multiplier is in use for step3
MULTPU4 BOOLEAN 0 When activated, the pickup multiplier is in use for step4
Section 8 1MRK 502 066-UUS B
Current protection
492
Technical manual
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