EnerSys alpha CXPS-E3, Руководство пользователя

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37 9400016-J0 Rev E
CXPS-E3 User Guide
7.2.1 Frame ground
There are several options for connecting a frame ground to the CXPS-E3 (select just one option):
• The options highlighted on either side of the CXPS-E3 distribution.
• As highlighted in the 2.4kW or 3.0kW user guide, a back connection on the side of the AC termination box.
•
If the frame that the CXPS-E3 is installed into is grounded, then it can also be grounded as a final option
through the mounting ears on the side of the CXPS-E3 through the frame.
Connection to CXPS-E3 directly
Connect a cable (matched to maximum size breaker, usually 2 AWG or less) between one of the side panels of
the CXPS-E3 to the master ground bus (MGB) or floor ground bus (FGB). This connection can be made using a
1/4" x 5/8" lug and two 1/4" x 20 bolts into the PEM nuts indicated in the following drawing.
Connection to overhead trays
Connect the CXPS-E3 to the frame using rails using 12-24 self-tapping screws. Ensure paint is removed to
ensure a good electrical connection between CXPS-E3 and frame.
Connect a cable to the frame in which the CXPS-E3 is installed. The rack upper crossbar (Figure 19) has
five 5/8" diameter holes to accommodate threaded rod attachment to the overhead trays. Connect the frame
ground 3/8" in 1" centers and 1/4" on 5/8" centers. Remove paint in lug contact area to ensure a good electrical
connection.
Ground wire
connection points
Ground wire
connection points
Figure 18 — Connecting the frame ground to the CXPS-E3
Figure 19 — Connecting the frame ground to overhead trays
Frame ground 1/4" on 5/8" centers
Frame ground 3/8" in 1" centers
5 x 5/8" diameter holes for connections to
the overhead trays