Name Values (Range) Unit Step Default Description
PU3_MaxEd2Set 5 - 2500 %IB 1 2500 Maximum settable operating phase
current level for step 3 in % of IBase, for
61850 Ed.2 settings
PU4_MinEd2Set 5 - 2500 %IB 1 5 Minimum settable operating phase current
level for step 4 in % of IBase, for 61850
Ed.2 settings
PU4_MaxEd2Set 5 - 2500 %IB 1 2500 Maximum settable operating phase
current level for step 4 in % of IBase, for
61850 Ed.2 settings
8.2.6 Monitored data
PID-6498-MONITOREDDATA v3
Table 218: OC4PTOC (51_67) Monitored data
Name Type Values (Range) Unit Description
DIR_A INTEGER 1=Forward
2=Reverse
0=No direction
- Direction for phase A
DIR_B INTEGER 1=Forward
2=Reverse
0=No direction
- Direction for phase B
DIR_C INTEGER 1=Forward
2=Reverse
0=No direction
- Direction for phase C
IA REAL - A Current in phase A
IB REAL - A Current in phase B
IC REAL - A Current in phase C
8.2.7 Operation principle
M12883-3 v9
The Four step phase overcurrent protection OC4PTOC (51_67) is divided into four different sub-
functions, one for each step. For each step
x
, where x is step 1, 2, 3 and 4, an operation mode is set
by
DirModeSelx
:
Disable
/
Non-directional
/
Forward
/
Reverse
.
The protection design can be divided into four parts:
• The direction element
• The harmonic restraint blocking function
• The four step over current function
• The mode selection
If VT inputs are not available or not connected, setting parameter
DirModeSelx
shall be left to default value,
Non-directional
.
1MRK 502 066-UUS B Section 8
Current protection
459
Technical manual
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