8.15
Date Code 20170927 Instruction Manual SEL-751 Relay
Front-Panel Operations
Two-Line Display Front Panel
remain, the relay re-illuminates the corresponding target LEDs. The TARGET
RESET pushbutton also removes the trip automatic message displayed on the
LCD menu screens if the trip conditions have cleared.
Figure 8.26 Target Reset Pushbutton
Lamp Test
The TARGET RESET pushbutton also provides a front-panel lamp test. Pressing
and holding TARGET RESET illuminates all the front-panel LEDs, and these
LEDs remain illuminated for as long as TARGET RESET is pressed. The target
LEDs return to a normal operational state after release of the TARGET RESET
pushbutton.
Other Target Reset Options
Use the ASCII command TAR R to reset the target LEDs; see Table 7.12 for
more information. Programming specific conditions in the SEL
OGIC control
equation RSTTRGT is another method for resetting target LEDs. Access
RSTTRGT in Global Settings (SET G Command), Data Reset on page 4.187
for further information.
Front-Panel Operator Control Pushbuttons
The base SEL-751 features eight operator-controlled pushbuttons, each with
two programmable tricolor pushbutton LEDs, for local control as shown in
Figure 8.27.
Figure 8.27 Operator Control Pushbuttons and LEDs
Pressing any one of these eight pushbuttons asserts the corresponding PBn
(n = 01 through 08) Relay Word bit, and the corresponding PBn_PUL Relay
Word bit. The PBn Relay Word bit remains asserted as long as the pushbutton
is pressed, but the PBn_PUL Relay Word bit asserts only for the initial
processing interval, even if the button is still being pressed. Releasing the
Factory Default
Slide-In Labels
PB2A_LED
PB02
PB2B_LED
PB3A_LED
PB03
PB3B_LED
PB4A_LED
PB04
PB4B_LED
PB1A_LED
PB01
PB1B_LED
AUX4
AUX3
AUX1
AUX2
PB6A_LED
PB06
PB6B_LED
PB7A_LED
PB07
PB7B_LED
PB8A_LED
PB08
PB8B_LED
PB5A_LED
PB05
PB5B_LED
BLOCK CLOSE
BREAKER CLOSED
BREAKER OPEN
Pushbutton LED
Operator Control Pushbutton
Pushbutton LED
AUX
NOTE: If the relay part number
specifies the Spanish language
option, all of the front-panel
pushbuttons and LED labels will be in
Spanish.
To Next Page
Loading...
