Name Values (Range) Unit Step Default Description
PU3_MaxEd2Set 1 - 2500 %IB 1 2500 Maximum settable operate residual
current level for step 3 in % of IBase, for
61850 Ed.2 settings
PU4_MinEd2Set 1 - 2500 %IB 1 1 Minimum settable operate residual current
level for step 4 in % of IBase, for 61850
Ed.2 settings
PU4_MaxEd2Set 1 - 2500 %IB 1 2500 Maximum settable operate residual
current level for step 4 in % of IBase, for
61850 Ed.2 settings
8.4.6 Monitored data
PID-6529-MONITOREDDATA v4
Table 233: EF4PTOC (51N_67N) Monitored data
Name Type Values (Range) Unit Description
IOp REAL - A Operating current level
VPol REAL - kV Polarizing voltage level
IPol REAL - A Polarizing current level
VPOLIANG REAL - deg Polarizing angle between voltage and
current
IPOLIANG REAL - deg Polarizing current angle
8.4.7 Operation principle
IP12992-1 v2
M13941-51 v6
This function has the following three “Analog Inputs” on its function block in the configuration
tool:
1. I3P, input used for “Operating Quantity”. Supply the zero-sequence magnitude measuring
functionality.
2. V3P, input used for “Voltage Polarizing Quantity”. Supply either zero or negative sequence
voltage to the directional functionality
3. I3PPOL, input used for “Current Polarizing Quantity”. Provide polarizing current to the
directional functionality. This current is normally taken from the grounding of a power
transformer.
4. I3PDIR, input used for “Directional detection”. Supply either zero or negative sequence current
to the directional functionality.
These inputs are connected from the corresponding pre-processing function blocks in the
Configuration Tool within PCM600.
8.4.7.1 Operating quantity within the function
M13941-58 v7
The function always uses Residual Current (3I
0
) for its operating quantity. The residual current can
be:
1. directly measured (when a dedicated CT input of the IED is connected in PCM600 to the
fourth analog input of the pre-processing block connected to EF4PTOC (51N/67N) function
input I3P). This dedicated IED CT input can be for example, connected to:
1MRK 502 066-UUS B Section 8
Current protection
479
Technical manual
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