The fault-related current, voltage, frequency, angle values, shot pointer and the
active setting group number are taken from the moment of the operate event, or
from the beginning of the fault if only a start event occurs during the fault. The
maximum current value collects the maximum fault currents during the fault. If
frequency cannot be measured, nominal frequency is used for frequency and zero
for frequency gradient and validity is set accordingly.
The measuring mode for phase current and residual current values can be selected
with the
A measurement mode
setting parameter.
For a detailed description of the measurement modes, see
Chapter 11.6
Measurement modes
in this manual.
3.9.3 Analog channel configuration
FLTRFRC has twelve analog group inputs which must be properly configured. All
inputs can be connected to GRPOFF.
Table 84: Analog inputs
Input Description
I3P1
1
Three-phase currents
I3P2
1
Three-phase currents
I3P3
1
Three-phase currents
IRES1
1
Residual current (measured or calculated)
IRES2
1
Residual current (measured or calculated)
IRES3
1
Residual current (measured or calculated)
U3P1
1
Three-phase voltages
U3P2
1
Three-phase voltages
U3P3
1
Three-phase voltages
URES1
1
Residual voltage (measured or calculated)
URES2
1
Residual voltage (measured or calculated)
URES3
1
Residual voltage (measured or calculated)
See the preprocessing function blocks in this document for the possible
signal sources. The GRPOFF signal is available in the function block called
Protection.
There are a few special conditions which must be noted with the configuration.
1
Can be connected to GRPOFF
1MRS759142 F Basic functions
REX640
Technical Manual
145
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