8.9
Date Code 20080918 Instruction Manual SEL-749M Relay
Front-Panel Operations
Operation and Target LEDs
use the {Left Arrow} and {Right Arrow} pushbuttons to select the digit to change
and the {Up Arrow} and {Down Arrow} pushbuttons to change the value. Press
{ENT} to enter the new setting.
Setting changes can also be made using
ACSELERATOR QuickSet
®
SEL-5030
software or ASCII SET commands via a communications port.
Status Menu
The Status menu item of the MAIN menu allows you to access the Relay
Status
data and Reboot Relay. See STATUS Command (Relay Self-Test
Status) on page U.7.24 for the STATUS command description.
Reset Access Lvl Menu
Select the Reset Access Lvl menu item on the MAIN menu to reset the
front-panel access to level 1. The reset is confirmed by the display message
Access Lvl Reset.
Operation and Target LEDs
Programmable LEDs
The SEL-749M provides quick confirmation of relay conditions via operation
and target LEDs. Figure 8.7 shows this region with factory default text on the
front-panel configurable labels.
Figure 8.7 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 T0n_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 T0nLEDL 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 Table 4.47.
T01_LED
T06_LED
Courtesy of NationalSwitchgear.com
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