Fault Recorder Fltrfrc; Function Block; Functionality - ABB RELION REX640 Technical Manual

Section 3
Basic functions
3.9
3.9.1
3.9.2
132

Fault recorder FLTRFRC

Function block

GUID-206F1F0C-1D18-4E10-BE6E-823B0A80B93B V1 EN
Figure 42: Function block

Functionality

The protection relay has the capacity to store the records of the latest 128 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
connected to the START input and ends if any protection function connected to the
OPERATE input 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. The TRIG input can be used to start the fault recording period with,
for example, binary input.
If Start duration has the value "100%", it indicates that a protection function has
operated during the fault; if none of the protection functions has operated, Start
duration always shows values less than 100%.
The fault recorded data Protection (rec. set 1 or rec. set 2) and Start duration are 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 the internal operate signal and the activation of the CB_CLRD
input.
1MRS759142 C
REX640
Technical Manual