9.30
SEL-700G Relay
Instruction Manual
Date Code 20170814
Analyzing Events
Event Reporting
Example SER Report
The example SER report in Figure 9.11 includes records of events that
occurred before the beginning of the event summary report in Figure 9.3.
Synchronism-Check
Report
SEL-700G relays equipped with synchronism check (25X) generate a report
each time the relay initiates a synchronism-check supervised generator
breaker close. The report contains information about the system and generator
at the time the close was performed. The relay stores the three latest reports in
nonvolatile relay memory. View the report data by using the SYN n (n is the
report number, n defaults to 1, which is the latest report) command available at
Access Level 1 and above. An example of the SYN report is shown in
Figure 9.12. Note that the relay selects phase for the generator voltage based
on the SYNCPX setting and reports its magnitude after compensating for the
25RCFX factor (see Vpxc in Figure 4.105).
SYN Report Triggering
The relay starts a SYN report when a synchronism-check supervised generator
breaker close is initiated. The relay defines a synchronism-check supervised
close initiation as the rising edge of CLOSEX * (25C + 25AX1 + 25AX2).
The relay triggers a SYN report for every synchronism-check supervised
close, regardless of which synchronism-check outputs (25C, 25AX1 or
25AX2) you used to supervise CLOSEX assertion. The relay starts the report
by recording the time of initiation.
=>>
SER <Enter>
SEL-700G Date: 02/24/2010 Time: 19:15:40.570
GENERATOR RELAY Time Source: External
Serial No = 000000000000000
FID = SEL-700G-X134-V0-Z001001-D20100224 CID = 1C01
# DATE TIME ELEMENT STATE
5 02/24/2010 19:08:09.705 87R Asserted
4 02/24/2010 19:08:09.705 TRIP3 Asserted
3 02/24/2010 19:08:09.705 TRIP2 Asserted
2 02/24/2010 19:08:09.705 TRIP1 Asserted
1 02/24/2010 19:08:09.705 TRIPX Asserted
=>>
Figure 9.11
Example Sequential Events Recorder (SER) Event Report
=>>
SYN <Enter>
SEL-700G Date: 03/04/2010 Time: 03:28:47.279
GENERATOR RELAY Time Source: Internal
Serial Number=000000000000000
FID=SEL-700G-X137-V0-Z001001-D20100303 CID=0000
CLOSEX*(25C+25AX1+25AX2) Asserted At:03/04/2010 03:20:55.252
Synch Check Conditions when CLOSEX Asserted:
Slip Freq. = 0.00Hz Generator Freq. = 60.00Hz System Freq. = 60.00Hz
Voltage Diff. = 1.61% Generator Voltage = 0.06kV System Voltage = 0.06kV
Slip-Compensated Phase Angle Difference = -2.04 degrees
Uncompensated Phase Angle Difference = -2.23 degrees
3POX Deasserted At : 03:20:55.419
Breaker Close Time : 0.167
Average Breaker Close Time = 0.125 (7.5 cycles)
Close Operations = 20
Last Reset = 03/03/2010 03:17:14.618
=>>
Figure 9.12
Example SYN Command Response
Summary of Contents for SEL-700G Series
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