ABB Relion 670 Series Technical Reference Manual page 960

Section 15
Monitoring
954
Trig point
PreFaultRecT
1
IEC05000487 V1 EN
Figure 475: 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
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
TimeLimit to set this time.
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
PreFaultRecT to set this time.
1MRK505222-UUS C
3
en05000487.vsd
TimeLimit the limit
PostFaultRecT to set this time.
Technical reference manual