8.4.6 Monitored data
PID-6967-MONITOREDDATA v3
Table 88: EF4PTOC Monitored data
Name
Type Values (Range) Unit Description
IOp REAL - A Operating current level
UPol REAL - kV Polarizing voltage level
IPol REAL - A Polarizing current level
UPOLIANG REAL - deg Polarizing angle
between voltage and
current
IPOLIANG
REAL - deg Polarizing current angle
8.4.7 Operation principle
IP12992-1 v2
M13941-51 v7
This function has the following four analog inputs on its function block in the
configuration tool:
1. I3P, input used for the operating quantity. Supplies the zero-sequence
magnitude measuring functionality.
2. U3P, input used for the voltage polarizing quantity. Supplies either the zero or
the negative sequence voltage to the directional functionality
3. I3PPOL, input used for the current polarizing quantity. Provides 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. Supplies either the zero or the
negative sequence current to the directional functionality.
These inputs are connected from the corresponding pre-processing function blocks
in the configuration tool in PCM600.
8.4.7.1 Operating quantity within the function
M13941-58 v9
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 function input I3P). This dedicated IED CT input can be, for
example, connected to:
1MRK 505 394-UEN A Section 8
Current protection
Line differential protection RED650 2.2 IEC 191
Technical manual
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