Signals - ABB RELION 670 Series Technical Manual

1MRK 502 066-UUS B
IDir, VPol and IPol can be independently selected to be either zero sequence or negative sequence.
Second harmonic blocking can be set individually for each step.
EF4PTOC (51N/67N) can be used as main protection for phase-to-ground faults.
EF4PTOC (51N/67N) can also be used to provide a system back-up 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. Current reversal and weak-end infeed functionality
are available as well.
Residual current can be calculated by summing the three phase currents or taking the input from
neutral CT
8.4.3 Function block
I3P*
V3P*
I3PPOL*
I3PDIR*
BLOCK
BLKTR
BLK1
BLK2
BLK3
BLK4
MULTPU1
MULTPU2
MULTPU3
MULTPU4
52A
CLOSECMD
OPENCMD
ANSI06000424 V4 EN-US
Figure 253: EF4PTOC (51N/67N) function block
8.4.4

Signals

Table 227: EF4PTOC (51N_67N) Input signals
Name
I3P
V3P
I3PPOL
Table continues on next page
Technical manual
EF4PTOC (51N_67N)
TRIP
TRST1
TRST2
TRST3
TRST4
TRSOTF
PICK UP
PUST1
PUST2
PUST3
PUST4
PUSOTF
PUFW
PUREV
2NDHARMD
ANSI06000424-4-en.vsd
Type Default
GROUP -
SIGNAL
GROUP -
SIGNAL
GROUP -
SIGNAL
Description
Group connection for operate current
Group connection for polarizing voltage
Group connection for polarizing current
Section 8
Current protection
M12619-3 v7
IP11453-1 v2
PID-6529-INPUTSIGNALS v4
471