Schweitzer Engineering Laboratories SEL-700G Series, Instruction Manual

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9.9
Date Code 20170814 Instruction Manual SEL-700G Relay
Analyzing Events
Event Reporting
Note that the ac values change from plus to minus (–) values in Figure 9.3,
indicating the sinusoidal nature of the waveforms.
Other figures help in understanding the information available in the event
report current columns:
➤
Figure 9.4 shows how analog event report current column data
relate to the actual sampled current waveform and rms current
values.
➤
Figure 9.5 shows how analog event report current column data
can be converted to phasor rms current values.
Example 15-Cycle
Event Report
The following example of a standard analog 15-cycle event report in
Figure 9.3 also corresponds to the example SER report in Figure 9.11. In
Figure 9.3, the trigger row includes an arrow (
>
) immediately following the
last analog column to indicate the trigger point. This is the row that
corresponds to the Date and Time values at the top of the event report.
The row including the asterisk (
*
) immediately following the last analog
column identifies the row with the maximum phase current. The maximum
phase current is calculated from the row identified with the asterisk and the
row one quarter-cycle previous (see Figure 9.4 and Figure 9.5). These currents
are listed at the end of the event report in the event summary. If the trigger row
(
>
) and the maximum phase current row (
*
) are the same row, the
*
symbol
takes precedence.
Out 12 1
2
b
OUT101 AND NOT OUT102
NOT OUT101 AND OUT102
OUT101 AND OUT102
Out 3 3
OUT103
Table 9.2 Analog Event Report Columns Definitions (Sheet 2 of 2)
Column
Heading Column
Symbols
Description
=>> EVE <Enter>
SEL-700G Date: 02/24/2010 Time: 19:08:09.705
GENERATOR RELAY
Date and Time of Event
Serial Number=000000000000000
FID=SEL-700G-X134-V0-Z001001-D20100224 CID=1C01
Firmware and Checksum Identifier
O
I u
N t
Currents (Amps Pri) Voltages (Volts Pri) 1 13
IAX IBX ICX IAY IBY ICY VAX VBX VCX VS FREQX 2 2
Analog and Digital Header
[1]
-61.0 -44.0 103.0 53.5 47.0 -105.0 -3747 -2971 6655 604 59.99 . ..
84.5 -93.5 8.0 -85.5 88.5 -3.5 5543 -5995 617 -846 59.99 . ..
60.0 43.5 -103.5 -54.0 -47.5 104.0 3744 2973 -6657 -605 59.99 . ..
-85.0 93.0 -8.5 85.0 -89.5 3.5 -5547 5993 -614 846 59.99 . ..
One Cycle of Data
Figure 9.3 Example Standard 15-Cycle Analog Event Report 1/4-Cycle Resolution