6-24 BE1-951 Reporting and Alarm Functions 9328900990 Rev L
Figure 6-11. TCM with Other Devices
FAULT REPORTING
Fault Reporting Expressions and Settings
The fault reporting function records and reports information about faults that have been detected by the
relay. The BE1-951 provides many fault reporting features. These features include Fault Summary
Reports, Sequence of Events Recorder Reports, Oscillographic Records, and Targets.
Logic expressions are used to define the three conditions for fault reporting. These conditions are Trip,
Pickup, and Logic trigger.
Figure 6-6 and Table 6-8 illustrate how each of these logic expressions is used
by the various relay functions. Note that even though BESTlogic expressions are used to define these
conditions, these expressions are not included here. Section 7, BESTlogic Programmable Logic, provides
information about using BESTlogic to program the relay.
Trip
Trip expressions are used by the fault reporting function to start logging targets for an event and to record
fault current magnitudes at the time of trip. The HMI uses the trip expression to seal-in the Trip LED. The
breaker monitoring function uses the trip expression to start counting the breaker operate time.
Pickup
Pickup expressions are used by the fault reporting function to time-stamp the fault summary record, time
the length of the fault from pickup to dropout (fault clearing time), and to control the recording of
oscillograph data. The HMI uses the pickup expression to control the flashing of the Trip LED. A pickup
expression is also used by the setting group selection function to prevent a setting group change during a
fault.
Logic
Logic trigger expressions allow the fault reporting function to be triggered even though the relay is not
picked up. A logic trigger expression provides an input to the fault reporting function much as the pickup
expression does. This logic expression is not used by the setting group selection or the HMI.
Fault Reporting Trigger Settings
Fault reporting trigger settings are made from the BESTlogic Function Element screen in BESTCOMS.
Figure 6-12 illustrates the BESTCOMS screen used to select BESTlogic settings for the Fault Recording
function. To open the BESTlogic Function Element screen for Fault Recording, select Reporting and
Alarms from the S
creens pull-down menu. Select the Fault Recording tab. Then select the Logic button in
the Fault Recording box in the upper left hand corner of the screen. Alternately, settings may be made
using SG-TRIGGER ASCII command.
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