Date Code 20020129
Front-Panel Interface
8-5
SEL-387E Instruction Manual
Frequency (F)
If F is selected, the relay displays “System Frequency” and “FREQ = xx.xx.”
Power (PWR)
If PWR is selected, the relay scrolls through real (MW), reactive (MVAR), and apparent (MVA)
power values. If the current and voltage transformers are wye connected (DELTA_Y = Y,
WnCT = Y) along with all three phase voltages connected to the relay (TPVI = Y), all phase
quantities are displayed. Otherwise, only total power values appear, assuming balanced load
conditions.
Energy (ENG)
If ENG is selected, a second screen giving the user a choice of Energy DISPLAY or RESET
appears. If DISPLAY is chosen, the relay scrolls through real (MWh) and reactive (MVARh)
quantities.
EVENTS
Push the
<EVENTS>
button to display short event summaries, comparable to the
HIS
serial port
command.
If no EVENT records exist, the display states “No Fault Data” and terminates the command.
If there are records to view, use the right/left arrows to review data within an event record and
the up/down arrows to move between event records. The information displayed for a given event
is: event number, date/time, active setting group, fault targets, and the winding secondary
current magnitudes (IA, IB, IC). The currents only appear if the entire event report still resides
in relay memory. The Analog Input Label names are not used in this display. Current
information is simply listed, for example, as
“W1”
followed by
“A B C”
and the magnitudes.
There may be as many as 99 event summaries in the history buffer, but a much smaller number
of full event reports. The
EVENTS
command will display everything but the currents for the
older, incomplete history summaries. Use
<CANCEL>
or
<EXIT>
to return to the default
display.
Figure 8.8, at the end of this section, shows the EVENTS display structure.
STATUS
The
<STATUS>
button displays the relay status information, in similar fashion to the serial port
STA
command. When
<STATUS>
is pushed, the initial display shows:
STATUS: [OK/WARN/FAIL]
FID=SEL-387E-R10
(e.g., the first 12 characters of the FID string)
The STATUS line shows the worst state of the several parameters examined. The right/left
arrow keys can be used to view the rest of the FID string.
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