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8.12
SEL-787 Relay
Instruction Manual
Date Code 20081022
Front-Panel Operations
Operation and Target LEDs
Figure 8.22
MAIN Menu and Status Submenu
Operation and Target LEDs
Programmable LEDs
The SEL-787 provides quick confirmation of relay conditions via operation
and target LEDs.
shows this region with factory default text on the
front-panel configurable labels. See
Target LED Settings on page 4.105
for the
SEL
OGIC
control equations.
Figure 8.23
Factory Default Front-Panel LEDs
You can reprogram all of these indicators except the
ENABLED
and
TRIP
LEDs
to reflect operating conditions other than the factory-default programming
described in this subsection.
Settings T0
n
_LED are SEL
OGIC
control equations that, when asserted during
a relay trip event, illuminate the corresponding LED. Parameter
n
is a number
from 1 through 6 that indicates each LED. The target LEDs can be set to latch
by the user. The setting T0
n
LEDL is set to Y to accomplish this. This setting
is set to N to disable the latch. 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
The SEL-787 comes with blank slide-in labels for custom LED designations
that match custom LED logic. The Configurable Label kit (includes blank
labels, word processor templates, and instructions) is shipped with the
SEL-787.
MAIN
Meter
Events
Targets
Control
Set/Show
Status
(Status Selected)
STATUS
Relay Status
Reboot Relay
T01_LED
Factory Default Label
T06_LED
ENABLED
TRIP
DIFFERENTIAL
INST. OVERCURRENT
TIME OVERCURRENT
OVER/UNDER VOLTAGE
OVER/UNDER FREQUENCY
VOLTS/HERTZ
Summary of Contents for SEL-787
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