8.12
SEL-787 Relay Instruction Manual Date Code 20150130
Front-Panel Operations
Operation and Target LEDs
Status Menu
Select the Status menu item on the MAIN menu as shown in Figure 8.22 to
access
Relay Status data and Reboot Relay. See STATUS Command (Relay
Self-Test Status) on page 7.40 for the STATUS data field description.
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. Figure 8.23 shows this region with factory-default text on
the front-panel configurable labels. See Target LED Settings on page 4.106 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.
T0n_LED settings are SEL
OGIC control equations that work with the
corresponding T0nLEDL latch settings to illuminate the LEDs shown in
Figure 8.23. Parameter n is a number from 1 through 6 that indicates each
LED. If the latch setting (T0nLEDL) for a certain LED is set to N, then the
LED will follow the status of the corresponding control equation (T0n_LED).
When the equation asserts, the LED will illuminate, and when the equation
deasserts, the LED will extinguish. If the latch setting is set to Y, the LED will
only assert if a trip condition occurs and the T0n_LED equation is asserted at
the time of the trip. At this point, the LED will latch in and can be reset using
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
To Next Page
