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Rockwell Automation Publication 1512A-UM101B-EN-P - December 2021
Appendix B ArcShield Plenum Installation Instructions
STEP 1 – Mounting a Single
Plenum
Before mounting a plenum over an MV enclosure, the front duct section must
first be removed (
Figure 66 - Removing Front Duct Section
Cabinet Preparation
In preparation to mount the plenum:
1. Remove the cabinet lifting means (slips of lifting angles).
2. Reinstall the 5/8-11 bolts retaining the lifting means in the holes from
where they came (11 lb•ft [14.5 N•m]). Failure to install the bolts negates
the cabinets ability to control any arc gases properly.
3. After the lifting angles or clips are removed, remove 1/4-20 fasteners
from the relief vent on the top of the MV enclosure. Leave the (4) corner
fasteners in place (
).
Front Duct Section
Components
ATTENTION:
Hardware used to retain the lifting provision hardware
must be reinstalled in the same holes (
). Failure to replace
this hardware will make the arc resistance of the cabinet ineffective
and could subject personnel to the possibility of severe burns, injury,
or death.
IMPORTANT
Do not remove the four corner fasteners (
)
