
Directional operation can be combined together with the corresponding communication
logic in permissive or blocking teleprotection scheme. The current reversal and weak-
end infeed functionality are available as well.
The residual current can be calculated by summing the three-phase currents or taking
the input from the neutral CT.
8.2.3
Function block
M12619-3 v8
=ANSI06000424=5=en=Original.vsdx
EF4PTOC (51N_67N)
I3P*
V3P*
I3PPOL*
I3PDIR*
BLOCK
BLKTR
BLK1
BLK2
BLK3
BLK4
MULTPU1
MULTPU2
MULTPU3
MULTPU4
52A
CLOSECMD
OPENCMD
TRIP
TRST1
TRST2
TRST3
TRST4
TRSOTF
PICK UP
PUST1
PUST2
PUST3
PUST4
PUSOTF
PUFW
PUREV
2NDHARMD
ANSI06000424 V5 EN-US
Figure 57:
EF4PTOC (51N/67N) function block
8.2.4
Signals
IP11453-1 v2
PID-6967-INPUTSIGNALS v3
Table 99:
EF4PTOC (51N_67N) Input signals
Name
Type
Default
Description
I3P
GROUP
SIGNAL
-
Group connection for operate current
V3P
GROUP
SIGNAL
-
Group connection for polarizing voltage
I3PPOL
GROUP
SIGNAL
-
Group connection for polarizing current
I3PDIR
GROUP
SIGNAL
-
Group connection for directional current
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)
Table continues on next page
1MRK 511 408-UUS A
Section 8
Current protection
Phasor measurement unit RES670 2.2 ANSI
189
Technical manual
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