Date Code 20110408 Instruction Manual SEL-551 Relay
Section 2
Installation
Overview
Design your installation using the mounting and connection information in
this section. Options include rack or panel mounting and terminal block or
plug-in connector (Connectorized
®
) wiring. This section also includes
information on configuring the relay for your application.
Relay Mounting
Rack Mount
A single SEL-551 Relay is roughly half the size of a standard 19-inch rack
(see Figure 2.1 and Figure 2.5). To mount the relay in a standard 19-inch rack
follow these steps:
Step 1. Use another SEL-500 series relay in a package (P/N 9101) or
use the Rack Mount Bracket (P/N 9100). See Figure 2.2,
Figure 2.3, and Figure 2.4.
Step 2. Secure the relays with four rack screws (two on each side) that
you insert from the front of the relays through the holes on the
relay mounting flanges.
Step 3. Reverse the relay mounting flanges on the single or package
versions to cause the relays to project 2.60 inches (66.1 mm).
This provides additional space at the rear of the relays for
applications where the relays might otherwise be too deep to
fit.
Panel Mount
We also offer the SEL-551 in a panel-mount version for a clean look.
Panel-mount relays have sculpted front-panel molding that covers all
installation holes. See Figure 2.1 and Figure 2.6. For a panel-mount
installation, follow these steps:
Step 1. Cut your panel and drill mounting holes according to the
dimensions in Figure 2.1.
Step 2. Insert the relay into the cutout, aligning four relay mounting
studs on the rear of the relay front panel with the drilled holes
in your panel.
Step 3. Use nuts to secure the relay to your panel.
The projection panel-mount option covers all installation holes and maintains
the sculpted look of the panel-mount option; the relay projects 2.60 inches
(66.1 mm) from the front of your panel. This ordering option increases space
at the rear of the relay for applications where the relay would ordinarily be too
deep to fit your cabinet.
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