Sel SEL-787 - Figure 5.19 Result of the TFE Command; Table 5.11 Through-Fault Events Report Messages

5.17
Date Code 20150130 Instruction Manual SEL-787 Relay
Metering and Monitoring
Through-Fault Event Monitoring
Following is a description of each column (#, Date, Time, etc.) of the event
report. Through-fault events are numbered (# column) from 1 (the most recent
event, at the top) to a maximum of 500 through-fault events.
Under the date and time columns, the event shows the date of occurrence and
the start time of each event (the date format depends upon the DATE_F
setting).
Although the element processes all values each cycle, event duration
(Duration column) is reported in seconds with processing interval resolution.
If the event duration is equal to or greater than 60 seconds, the element
appends a “+” to the time value of 60 seconds.
IA, IB, and IC show the maximum primary current for each phase, with a
maximum of 100,000 A primary.
A, B, and C show the amount (percent increase) of the present fault for each
phase. Alarm shows those phase(s) that were in the alarm state at the end of
the through-fault event.
Table 5.11 shows events report messages and the reason why these messages
may appear in the events report.
=>>TFE <Enter>
SEL-787 Date: 04/03/2008 Time: 15:24:02
TRNSFRMR RELAY Time Source: Internal
Winding 1
Total Number of Transformer Through Faults: 4
Total Number of A Phase Through Faults: 2
Total Number of B Phase Through Faults: 1
Total Number of C Phase Through Faults: 1
Total Accumulated Percentage of Through Fault Capability:
A-Phase B-Phase C-Phase
95.97 60.00 60.00
Through Fault Alarm: 0 0 0
Last Reset: 04/03/2008 15:16:27
# DATE TIME Duration IA IB IC A B C Alarm
(seconds) (max primary kA) (Increment %)
1 04/03/2008 15:23:37.102 19.983 1.99 0.00 0.00 35.97 0.00 0.00
2 04/03/2008 15:20:23.256 1.663 0.00 0.00 3.28 0.00 0.00 50.94 ABC
3 04/03/2008 15:20:19.918 1.675 0.00 6.37 0.00 0.00 99.99 0.00 AB
4 04/03/2008 15:20:16.596 1.650 1.99 0.00 0.00 2.97 0.00 0.00 A
=>>
Figure 5.19 Result of the TFE Command
Table 5.11 Through-Fault Events Report Messages
Message Cause
Invalid Data The accumulated data are corrupt.
Through Fault Event Monitor Disabled The ETHRFLT setting is NA, or evaluates to
logical 0.
Too many events - Data Lost The memory is full.
Through Fault Event Buffer Empty There are no event records in the nonvolatile
memory
Memory resources are low; check for
activity on other ports
There is insufficient memory to display the
event records