ABB RELION Series, Technical Manual

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Name Type Description
REMOTE BOOLEAN Control remote
ALL BOOLEAN Control all
BEH_BLK BOOLEAN Logical device LD0 block status
BEH_TST BOOLEAN Logical device LD0 test status
3.7 Fault recorder FLTRFRC
3.7.1 Function block
GUID-6BE3D723-0C52-4047-AA41-73D7C828B02B V1 EN
Figure 24: Function block
3.7.2 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.
Section 3
1MRS758755 A
Basic functions
66 REC615 and RER615
Technical Manual