Schweitzer Engineering Laboratories SEL-421-4 - Page 898

4.2
SEL-400 Series Relays Instruction Manual Date Code 20171006
Front-Panel Operations
Front-Panel Layout
Figure 4.1 SEL-451 Front Panel (8-Pushbutton Model)
Figure 4.2 SEL-451 Front Panel (12-Pushbutton Model) with Optional Auxiliary Trip/Close Buttons
Liquid Crystal
Display (LCD)
and Navigation
Pushbuttons
Operation
and Trip
Target LEDs
Direct-Action
Pushbuttons
and Indicators
EIA-232
Serial Port
i4055c