The fault recording period begins from the start event of any protection function
and ends if any protection function trips or the start is restored before the operate
event. If a start is restored without an operate event, the start duration shows the
protection function that has started first.
Start duration that has the value of 100% indicates that a protection function
has operated during the fault and if none of the protection functions has been
operated, Start duration shows always values less than 100%.
The Fault recorded data Protection and Start duration is from the same protection
function. The Fault recorded data operate time shows the time of the actual fault
period. This value is the time difference between the activation of the internal start
and operate signals. The actual operate time also includes the starting time and
the delay of the output relay. The Fault recorded data
Breaker clear time
is the time
difference between internal operate signal and activation of CB_CLRD input.
If some functions in relay application are sensitive to start frequently
it might be advisable to set the setting parameter
Trig mode
to “From
operate”. Then only faults that cause an operate event trigger a new fault
recording.
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. In case
frequency cannot be measured, nominal frequency is used for frequency and zero
for Frequency gradient and validity is set accordingly.
Measuring mode for phase current and residual current values can be selected with
the
Measurement mode
setting parameter.
3.8.3 Settings
3.8.3.1 FLTRFRC Non group settings
Table 45: FLTRFRC Non group settings (Basic)
Parameter Values (Range) Unit Step Default Description
Operation
1=on
5=off
1=on Operation Off / On
Trig mode
0=From all faults
1=From operate
2=From only start
0=From all faults Triggering mode
Table 46: FLTRFRC Non group settings (Advanced)
Parameter Values (Range) Unit Step Default Description
A measurement
mode
1=RMS
2=DFT
3=Peak-to-Peak
2=DFT Selects used meas-
urement mode
phase currents and
residual current
Basic functions 1MRS758755 C
80 REC615 & RER615
Technical Manual
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