Schweitzer Engineering Laboratories SEL-701-1, Instruction Manual

Page: 221 / 452

Date Code 20011009
SEL-701-1 Monitor
Event Analysis
Event Reports
8.11
Filtered & Unfiltered Event Reports
The SEL-701-1 Monitor samples the basic power system measurands (ac current
and ac voltage) 16 times per power system cycle. The monitor filters the measurands to
remove transient signals. Four times per cycle the monitor operates on the filtered
values and reports them in the event report.
To view the raw inputs to the monitor, use the unfiltered event report retrieved
using the serial port command EVENT n R . Use the unfiltered event reports to
observe:
Power system harmonics on current and voltage channels.
Decaying dc offset during fault conditions on IA, IB, or IC.
Raw event reports display one extra cycle of data at the beginning of the report.
Resetting the Event Report Buffer
The HISTORY R command clears the event summaries and corresponding event
reports from nonvolatile memory. See Section 5: ASCII Serial Port Operation for more
information on the HISTORY command.
In 12
1
Contact input IN1 asserted.
2
Contact input IN2 asserted.
b
Both IN1 and IN2 asserted.
In 34
3
Contact input IN3 asserted.
4
Contact input IN4 asserted.
b
Both IN3 and IN4 asserted.
In 56
5
Contact input IN5 asserted.
6
Contact input IN6 asserted.
b
Both IN5 and IN6 asserted.
In 7
7
Contact input IN7 (from SEL-2600) asserted.
Table 8.5 Output, Input, and Element Event Report Columns (Sheet 3 of 3)
Column
Heading
Symbol Definition