Schweitzer Engineering Laboratories SEL-700G Series, Instruction Manual

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9.8
SEL-700G Relay Instruction Manual Date Code 20170814
Analyzing Events
Event Reporting
the filtered values and reports these values in the standard, filtered event report
(4 samples per cycle).
To view the raw inputs to the relay, select the unfiltered event report by using
the EVE R command. Use the unfiltered event reports to observe power
system conditions:
➤
Power system transients on current and voltage channels
➤
Decaying dc offset during fault conditions on current channels
Raw event reports display one extra cycle of data at the beginning of the
report. Also, unlike the filtered report, the raw event report shows the actual
relay terminal voltage inputs so if the external connections are for DELTA
input, VA = Vab, VB = 0, VC = –Vbc (in primary volts).
Analog Event Report Column Definitions
Refer to the example analog event report in Figure 9.3 to view event report
columns. This example event report displays rows of information each 1/4
cycle. Retrieve this report with the EVE command.
The columns contain analog values, including ac current, ac voltage, and
frequency, followed by base model input and output information. Table 9.2
summarizes the analog event report columns.
Table 9.2 Analog Event Report Columns Definitions (Sheet 1 of 2)
Column
Heading Column
Symbols
Description
IAX
Current measured by channel IAX (primary A)
IBX
Current measured by channel IBX (primary A)
ICX
Current measured by channel ICX (primary A)
IAY
Current measured by channel IAY (primary A)
IBY
Current measured by channel IBY (primary A)
ICY
Current measured by channel ICY (primary A)
IN
Current measured by channel IN (primary A) when neutral CT
is present
VAX
or
VABX
Voltage measured by channel VAX or VABX (primary V)
VBX
or
VBCX
Voltage measured by channel VBX or VBCX (primary V)
VCX
or
VCAX
Voltage measured by channel VCX or VCAX calculated from
VABX and VBCX (primary V)
VAY
or
VABY
Voltage measured by channel VAY or VABY (primary V)
VBY
or
VBCY
Voltage measured by channel VBY or VBCY (primary V)
VCY
or
VCAY
Voltage measured by channel VCY or VCAY calculated from
VABY and VBCY (primary V)
VN
Voltage measured by channel VN (primary V)
VS
Voltage measured by channel VS (primary V)
FREQX
Frequency measured by channel FREQX (Hertz)
FREQY
Frequency measured by channel FREQY (Hertz)
In 12 1
2
b
IN101 AND NOT IN102
NOT IN101 AND IN102
IN101 AND IN102
NOTE:
Figure 9.3 is on multiple
pages.
NOTE:
Active channels depend on
the specific relay model.