6.4
SEL-734 Meter Instruction Manual Date Code 20090730
Power Quality and Event Analysis
Event Reports
event reports. Use the EVE C R or CEVENT R commands to display raw
event reports in the Compressed ASCII format. See Table C.2 for further
information.
Comtrade Format
Event Reports
The SEL-734 provides the raw event report in Comtrade format for use with
SEL-5601 and other Comtrade viewers. The CTR command displays the raw
event report in Comtrade format, meeting the International Standard for
Comtrade Format for Transient Data Exchange (COMTRADE) for power
systems (IEC 60255-24). The user may generate files for both analog and
digital signals, or for solely analog signals based on command format. Use the
CTR command with the following format to display or save these records.
CTR [n] x [y]
Each Comtrade record consists of a configuration and a data file. To save
these files, capture the configuration file using the CTR C or CTR C A
command, saving it with file extension .cfg. Save the data file in a similar
manner, using the CTR D or CTR D A command to retrieve the file and
save it using the .dat extension.
Configuration and data file names should be the same with extensions
.cfg and .dat, respectively.
The CTR command is available at Access Level 1 and above (see
Command Explanations on page 10.14).
Standard Event Reports With Meter Form 5
When you order the meter as a Form 5, the event report voltage columns
reflect the signals applied to meter terminals VA-N, VB-N, VC-N, even
though the meter is configured for an open-delta PT connection (see
Figure 2.6). If the meter is properly wired, the value shown in column VB
should be at or near 0 kV, because input terminal VB is tied to terminal N.
Column VA should reflect power system voltage V
AB
, and column VC should
reflect power system voltage V
CB
(or –V
BC
).
Auto Messages
The SEL-734 can automatically send unsolicited text messages called Auto
Messages over the serial ports to other devices. These messages include
device power-on or reset, event triggers, and self-test warnings or failures. To
enable Auto Messages, select Y in the serial port setting Send Auto Messages
to Port. Figure 6.2 shows a typical Auto Message response when the meter
triggers an event report.
where:
n = Event number (1–number of events stored). Defaults to 1
if not listed, where 1 is the most recent event.
x = either C (configuration) or D (data)
y = either A or blank. A designates analog data only. If left
blank, both analog and digital data are generated.
Courtesy of NationalSwitchgear.com
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