Schweitzer Engineering Laboratories SEL-311C - Clearing Standard Event Report Buffer; Standard Event Report Column Definitions; Table 12.3 Standard Event Report Current, Voltage, and Frequency Columns

12.9
Date Code 20060320 Instruction Manual SEL-311C Relay
Standard Event Reports and SER
Standard 15/30/60/180-Cycle Event Reports
➤ Optoisolated input contact bounce
➤ Transients on the station dc battery channel Vdc (power input
terminals Z25 and Z26)
The filters for ac current and voltage and station battery are fixed. You can
adjust the optoisolated input debounce via debounce settings (see Figure 7.1
and Figure 7.2).
Raw event reports display one extra cycle of data at the beginning of the
report.
Clearing Standard
Event Report Buffer
The HIS C command clears the event summaries and corresponding standard
event reports from nonvolatile memory. See Section 10: Serial Port
Communications and Commands for more information on the HIS (Event
Summaries/History) command.
Standard Event
Report Column
Definitions
Refer to the example event report in Figure 12.3 to view event report columns.
This example event report displays rows of information each 1/4 cycle and
was retrieved with the EVE command.
The columns contain ac current, ac voltage, station dc battery voltage, and
directional polarizing voltage (V1Mem).
Current, Voltage, and Frequency Columns
Table 12.3 summarizes the event report current, voltage, and frequency
columns.
Note that the ac values change from positive to negative in Figure 12.3,
indicating the sinusoidal nature of the waveforms.
NOTE: Figure 12.3 is on multiple
pages.
Table 12.3 Standard Event Report Current, Voltage, and Frequency Columns
Column
Heading
Definition
IA
Current measured by channel IA (primary A)
IB
Current measured by channel IB (primary A)
IC
Current measured by channel IC (primary A)
IP
Current measured by channel IP (primary A)
IG
Calculated residual current IG = 3I
0
= IA + IB + IC (primary A)
VA
Voltage measured by channel VA (primary kV)
VB
Voltage measured by channel VB (primary kV)
VC
Voltage measured by channel VC (primary kV)
VS
Voltage measured by channel VS (primary kV)
V1Mem
Positive-sequence memory voltage (primary kV)
FREQ
Frequency of Channel VA (not available with P parameter)
DT
Difference time referenced to previous row (only available with P parameter)
Vdc
Voltage measured at power input terminals Z25 and Z26 (Vdc)