The residual current can be calculated by summing the three-phase currents or
taking the input from the neutral CT.
7.4.3
Function block
M12619-3 v8
EF4PTOC
I3P*
U3P*
I3PPOL*
I3PDIR*
BLOCK
BLKTR
BLKST1
BLKST2
BLKST3
BLKST4
ENMULT1
ENMULT2
ENMULT3
ENMULT4
CBPOS
CLOSECB
OPENCB
TRIP
TRIN1
TRIN2
TRIN3
TRIN4
TRSOTF
START
STIN1
STIN2
STIN3
STIN4
STSOTF
STFW
STRV
2NDHARMD
IEC06000424-5-en.vsdx
IEC06000424 V5 EN-US
Figure 90:
EF4PTOC function block
7.4.4
Signals
IP11453-1 v2
PID-6967-INPUTSIGNALS v3
Table 86:
EF4PTOC Input signals
Name
Type
Default
Description
I3P
GROUP
SIGNAL
-
Group connection for operate current
U3P
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
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
Table continues on next page
1MRK 506 382-UEN A
Section 7
Current protection
Line distance protection REL650 2.2 IEC
183
Technical manual
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