Schweitzer Engineering Laboratories SEL-351-5, Instruction Manual

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12.9
Date Code 20070117
Instruction Manual SEL-351-5, -6, -7 Relay
Standard Event Reports, Sag/Swell/Interruption Report, and SER
Standard 15/30-Cycle Event Reports
➤
Optoisolated input contact bounce on channels
IN101
–
IN106
➤
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.
Unfiltered Event Reports With PTCONN = DELTA
When global setting PTCONN = DELTA, the raw event report voltage
columns reflect the signals applied to relay terminals
VA-N , VB-N , VC-N , even
though the relay is configured for an open-delta PT connection (see
Figure 2.22 ). If the relay is properly wired, the value shown in column
VB
should be at or near 0 kV, because input terminal
VB
is tied to terminal
N
.
Column
VA
should reflect power system voltage V
AB
, and column
VC
should
reflect power system voltage V
CB
(or –V
BC
).
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,
frequency, output, input, and protection and control element information.
Current, Voltage, and Frequency Columns
Table 12.2 summarizes the event report current, voltage, and frequency
columns.
Table 12.2 Standard Event Report Current, Voltage, and Frequency Columns
(Sheet 1 of 2)
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, PTCONN = WYE)
a
VB
Voltage measured by channel VB (primary kV, PTCONN = WYE)
a
VC Voltage measured by channel VC (primary kV, PTCONN = WYE)
a
VAB Power system phase-to-phase voltage V
AB
(primary kV, PTCONN = DELTA)
b
VBC
Power system phase-to-phase voltage V
BC
(primary kV, PTCONN = DELTA)
b
NOTE:
Figure 12.3 is on multiple
pages.