2-2 Installation Date Code 20001006
SEL-351 Instruction Manual
Figure 2.1 gives the SEL-351 Relay dimensions for rack-mount and panel-mount models.
For panel-mount models, the 7/32" (5.6 mm) drill holes shown in the Figure 2.1 panel cutout are to
accommodate the four integral #10-32 studs that project out the back of the front panel of the
panel-mount relays. These studs are used to fasten the panel-mount relays to the greater panel
surface, which has been drilled and cut according to Figure 2.1 specifications. The panel-mount
relays slide in from the front and are fastened (via the integral studs) on the back.
The rack-mount and panel-mount dimensions are identical except the front panel dimensions on the
panel-mount version are larger to hide any panel cuts.
REAR-PANEL CONNECTION DIAGRAMS
Figure 2.2 through Figure 2.5 represent examples of different relay configurations. All 3U rack
height units can be ordered with terminal block, plug-in connectors, or extra I/O. All 2U rack
height units can be equipped with terminal blocks or plug-in connectors. For model options, view
the SEL-351 Model Options Table on our web site, or contact your local SEL sales representative.
Courtesy of NationalSwitchgear.com
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