Basler Electric BE1-851 - Manual (Page 127)

If the fault report was triggered manually from the View/Download Relay Fault Files screen, the recording
of the report was terminated after 60 seconds and this line is reported as N/A.
If the pickup or logic expressions stay TRUE for more than 60 seconds, an alarm bit in the programmable
alarm function is set and this line is reported as N/A. In this situation, the fault reporting functions
(including targets) will not operate again until the pickup and logic trigger expressions return to a FALSE
state to enable another trigger.
Breaker Operate Time. This line reports the breaker trip time from the breaker monitoring and alarm
function. This is the time measured from when the breaker is tripped until the fast-dropout current detector
function detects that the arc has been extinguished. Refer to Figure 6-8 and Table 6-8, cal-out D.
Oscillographic Reports. This line reports the number of oscillographic records (1 or 2) that are stored in
memory for this fault report. Refer to Figure 6-8 and Table 6-8, call-out E. Recording of oscillographic
records is described in the Oscillographic Records subsection.
IA, IB, IC, IN, IQ. These lines report the current magnitudes measured two power system cycles
immediately following the trigger trip. If the fault is cleared before the relay tripping, the recorded fault
currents are for the power system cycle two cycles before the end of the fault. If the relay has been set to
the average current measurement algorithm, these currents may not be representative due to the time
constant inherent in the measurement algorithm. Refer to Figure 6-8 and Table 6-8, call-out F.
Retrieving Fault Report Information from the Relay
Fault Summary Directory Report. The fault reporting function provides a directory of fault summary
reports that lists the number assigned to the fault summary report along with the date and time of the
fault, the event type, and the total number of oscillography records stored in memory for that event. The
event number is important because it is required to retrieve information about that event from the relay.
This directory report can be accessed by using the RF command.
New Faults Counter. One line of the fault summary directory report contains the new faults counter. The
new faults counter tracks how many new fault reports have been recorded since the new faults counter
was reset to 0. This counter provides a way to check the fault information and then reset the new faults
counter. Then, the next time that the relay is checked, it is easy to determine if any fault reports have
been entered. Resetting the new faults counter is achieved using the RF-NEW=0 command. Write access
to Reports must be gained to reset the new faults counter through the communication ports. The new
faults counter can also be viewed and reset at HMI Screen 4.1.
Fault Summary Reports. Individual fault summary reports can be retrieved using the RF-n command
where n represents the number assigned to the fault summary report. To obtain the most recent report,
use the command RF-NEW. If additional detail is desired, Sequence of Events Recorder data and
oscillographic data can also be obtained for the faults. This is discussed in detail later in this section.
Receiving Fault Report Information from COM1 using the SG-DATADUMP command
When the DATADUMP function is enabled, a fault summary report is automatically sent to COM1 (Rear
RS-232) each time a fault occurs. For more information on fault summary reports, see Fault Summary
Reports, explained previously in this section.
NOTE
If ACCESS is held on COM1 (Rear RS-232), the DATADUMP function will be
paused until ACCESS is released by using the “EXIT” command.
Refer to Section 14, BESTCOMS Software, Setting the Relay, General Operation, Communication for
information on enabling the DATADUMP through BESTCOMS.
Oscillographic Records
The fault reporting function can record up to 16 IEEE Standard Common Format for Transient Data
Exchange (COMTRADE) oscillographic records. Each record is 15 cycles long and records 24 samples
per cycle for the A, B, C, and N current inputs. The relay uses 24 samples per cycle in its operation. Each
time the fault reporting function starts recording a fault summary report, it freezes a 3-cycle pre-fault
buffer and records for 12 post-trigger cycles. If the fault is not cleared within that time, the fault reporting
function records a second oscillographic record. If a second oscillographic record is required, the fault
recording function will continue to record sample data in the second record with no gap. During this time,
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BE1-851 Reporting and Alarms 6-25