Schweitzer Engineering Laboratories SEL-787, Instruction Manual, Page: 341 / 564

9.7
Date Code 20081022 Instruction Manual SEL-787 Relay
Analyzing Events
Event Reporting
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
NOTE:
Figure 9.3 is on multiple
pages.
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.
Note that the ac values change from plus to minus (–) values in Figure 9.3 ,
indicating the sinusoidal nature of the waveforms.
Table 9.2 Analog Event Report Columns Definitions
Column
Heading Column
Symbols
Description
IAW1
Current measured by channel IA, Winding 1 (primary A)
IBW1
Current measured by channel IB, Winding 1 (primary A)
ICW1 Current measured by channel IC, Winding 1 (primary A)
IGW1 Residual current (IAW1 + IBW1 + ICW1, primary A), dis-
played only when no voltages are shown
IAW2
Current measured by channel IA, Winding 2 (primary A)
IBW2
Current measured by channel IB, Winding 2 (primary A)
ICW2 Current measured by channel IC, Winding 2 (primary A)
IGW2 Residual current (IAW2 + IBW2 + ICW2, primary A), dis-
played only when no voltages are shown
IN
Current measured by channel IN (primary A) when neutral
CT is present
VAN or VAB Voltage measured by channel VAN or VAB (primary V),
requires voltage input
VBN or VBC Voltage measured by channel VBN or VBC (primary V),
requires voltage input
VCN or VCA Voltage measured by channel VCN or VCA calculated from
VAB and VBC (primary V), requires voltage input
In 12
1
2
b
IN101 AND NOT IN102
NOT IN101 AND IN102
IN101 AND IN102
Out 12
1
2
b
OUT101 AND NOT OUT102
NOT OUT101 AND OUT102
OUT101 AND OUT102
Out 3 3 OUT103