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Second harmonic blocking level can be set for the function and can be used to block each
step individually
6.2.3
Function block
ANSI08000002-2-en.vsd
OC4PTOC (51_67)
I3P*
V3P*
BLOCK
BLK1
BLK2
BLK3
BLK4
TRIP
TRST1
TRST2
TRST3
TRST4
PICKUP
PU_ST1
PU_ST2
PU_ST3
PU_ST4
PU_A
PU_B
PU_C
2NDHARM
ANSI08000002 V2 EN
Figure 30:
OC4PTOC (51/67) function block
6.2.4
Signals
Table 30:
OC4PTOC (51_67) Input signals
Name
Type
Default
Description
I3P
GROUP
SIGNAL
-
Three phase group signal for current inputs
U3P
GROUP
SIGNAL
-
Three phase group signal for voltage inputs
BLOCK
BOOLEAN
0
Block of function
BLKST1
BOOLEAN
0
Block of step 1
BLKST2
BOOLEAN
0
Block of step 2
BLKST3
BOOLEAN
0
Block of step 3
BLKST4
BOOLEAN
0
Block of step 4
Table 31:
OC4PTOC (51_67) Output signals
Name
Type
Description
TRIP
BOOLEAN
Common trip signal
TR1
BOOLEAN
Trip signal from step 1
TR2
BOOLEAN
Trip signal from step 2
TR3
BOOLEAN
Trip signal from step 3
Table continues on next page
Section 6
1MRK 511 287-UUS A
Current protection
86
Technical manual
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