P.7.36
SEL-411L Relay Protection Manual Date Code 20151029
Front-Panel Operations
Operation and Target LEDs
Figure 7.44 Sample Status Warning in the LCD Message Area
For a status failure, the relay immediately displays the full-screen status alert
regardless of the present front-panel operating state. The relay displays no
further LCD screens until the status failure clears. Should an unlikely status
failure event occur, contact your local Technical Service Center or an SEL
factory representative (see Factory Assistance on page P.11.46).
Operation and Target LEDs
The relay gives you at-a-glance confirmation of relay conditions via operation
and target LEDs. These LEDs are located in the middle of the relay front
panel.
You can reprogram all of these indicators except the ENABLED and TRIP LEDs
to reflect other operating conditions than the factory default programming
described in this subsection. Settings Tn_LED are SEL
OGIC control equations
that, when asserted during a relay trip event, light the corresponding LED.
Parameter n is a number from 1–24 that indicates each LED. LED positions
are described in parenthesis next to each LED in Figure 7.45.
Program settings TnLEDL := Y to latch the LEDs during trip events; when
you set TnLEDL := N, the trip latch supervision has no effect and the LED
follows the state of the Tn_LED SEL
OGIC control equation. The relay reports
these targets in event reports; set the alias name listed in the report (as many as
seven characters) by aliasing the Tn_LED bits using the SET T command or
the SEL-5030 software. The asserted and deasserted colors for the LED are
determined with settings TnLEDC. Options include red, green, amber, or off.
After setting the target LEDs, issue the TAR R command to reset the target
LEDs. For a concise listing of the default programming on the front-panel
LEDs, see Front-Panel Settings on page P.5.11.
Use the slide-in labels to mark the LEDs with custom names. Included on the
relay Product Literature CD are Customer Label Templates to print labels for
the slide-in label carrier.
1 Closed (OK to TIE)
0 Open (No TIE)
BUS TIE INTERLOCK
1
0
RELAY STATUS WARNING
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