Schweitzer Engineering Laboratories SEL-351 - Clearing Standard Event Report Buffer; Current, Voltage, and Frequency Columns; Standard Event Report Column Definitions

12-8 Standard Event Reports, Sag/Swell/Interruption Report, and SER Date Code 20001006
SEL-351 Instruction Manual
The filters for ac current and voltage and station battery are fixed. You can adjust the optoisolated
input debounce via debounce settings (see Figures 7.1 through 7.3 in Section 7: Inputs, Outputs,
Timers, and Other Control Logic).
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 12.2 to view event report columns (Note: Figure 12.2
is on multiple pages). 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, frequency, output, input,
and protection and control element information.
Current, Voltage, and Frequency Columns
Table 12.3 summarizes the event report current, voltage, and frequency columns.
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)
IN Current measured by channel IN (primary A)
IG Calculated residual current IG = 3I
0
= IA + IB + IC (primary A)
VA Voltage measured by channel VA (primary kV, wye-connected)
VB Voltage measured by channel VB (primary kV, wye-connected)
VC Voltage measured by channel VC (primary kV, wye-connected)
VAB Voltage measured by channel VAB (primary kV, delta-connected)
VBC Voltage measured by channel VBC (primary kV, delta-connected)
VCA Voltage measured by channel VCA (primary kV, delta-connected)
VS Voltage measured by channel VS (primary kV)
Vdc Voltage measured at power input terminals Z15 and Z16 (Vdc)
Freq Frequency of channel VA (Hz)
Courtesy of NationalSwitchgear.com