ABB Relion 620 Series - Fault Recorder FLTRFRC; Function Block; Functionality

Name Type Description
ALL BOOLEAN Control all
BEH_BLK BOOLEAN Logical device LD0 block sta-
tus
BEH_TST BOOLEAN Logical device LD0 test sta-
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3.8 Fault recorder FLTRFRC
3.8.1 Function block
Figure 32: Function block
3.8.2 Functionality
The protection relay has the capacity to store the records of 128 latest fault events.
Fault records include fundamental or RMS current values. The records enable
the user to analyze recent power system events. Each fault record (FLTRFRC) is
marked with an up-counting fault number and a time stamp that is taken from the
beginning of the fault.
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
Basic functions
1MRS757644 H
98 620 series
Technical Manual