ABB RED650 Technical Manual page 588

Section 15
Monitoring
582
Trig point
PreFaultRecT
1
IEC05000487 V1 EN-US
Figure 287: The recording times definition
PreFaultRecT, 1 Pre-fault or pre-trigger recording time. The time before the fault including the
operate time of the trigger. Use the setting
tFault, 2 Fault time of the recording. The fault time cannot be set. It continues as long as
any valid trigger condition, binary or analog, persists (unless limited by
the limit time).
PostFaultRecT, 3 Post fault recording time. The time the disturbance recording continues after all
activated triggers are reset. Use the setting
TimeLimit Limit time. The maximum allowed recording time after the disturbance recording
was triggered. The limit time is used to eliminate the consequences of a trigger
that does not reset within a reasonable time interval. It limits the maximum
recording time of a recording and prevents subsequent overwriting of already
stored disturbances. Use the setting
Analog signals
Up to 40 analog signals can be selected for recording by the Disturbance recorder
and triggering of the Disturbance report function. Out of these 40, 30 are reserved
for external analog signals from analog input modules (TRM) and line data
communication module (LDCM) via preprocessing function blocks (SMAI) and
summation block (3PHSUM). The last 10 channels may be connected to internally
calculated analog signals available as function block output signals (mA input
signals, phase differential currents, bias currents and so on).
TimeLimit
PostFaultRecT
2
TimeLimit to set this time.
1MRK 505 394-UEN A
3
en05000487.vsd
PreFaultRecT to set this time.
PostFaultRecT to set this time.
Line differential protection RED650 2.2 IEC
Technical manual
TimeLimit
M12155-160 v8