17
Instruction Booklet
IB48088
Effective July 2021
Instructions for Eaton’s 7.2 kV Ampgard AR
(arc resistant motor control center)
(Compliant to IEEE C37.20.7-2017)
EATON
www.eaton.com
Section 5: Duct and plenum installation
Ampgard AR equipment is only complete when a plenum and arc
exhaust ducts are correctly installed. Eaton supplied duct and
plenum provides containment for arc exhaust gases due to an inter-
nal arcing fault in the equipment.
5.1 Receiving
Ducts and plenums are usually shipped to the customer pre-
assembled to match the shipping sections/splits and bolted to a
wooden skid and covered with protective material. A box(s) labeled
“Installation Parts or Ship Loose Parts” is also included. This box
contains the packing list. The packing list identifies all cartons and
skids. Each carton and skid is labeled with the shop order number
and a shipping weight.
Only accept items from shipping carrier if all the items described on
the packing list have been received.
If the equipment has been damaged, file a claim as soon as possible
with the carrier and notify the nearest Eaton representative.
5.2 Handling
Plenums will arrive on a pallet. Use a fork truck to maneuver the
pallet into the desired position and remove packaging. Many open-
ings in the plenum will have shipping braces across them for rigidity.
Leave these in place until the plenum is placed onto the switchgear.
The preferred method of lifting and maneuvering shipping sections
into their final position is with an overhead crane. Lifting plates are
bolted to the top of each shipping group. Using a four-leg bridle
sling chain, place one hook through each of the four eyes to lift and
move the group. No leg of the sling shall be at an angle greater than
45 degrees from the vertical - use a spreader beam if necessary, to
correct this condition. Remove the shipping braces before setting
the plenum. After the shipping section has been moved into instal-
lation position and secured, remove the lifting plates and discard
them.
If a crane is not available, the plenum may be lifted by another
means, taking care to prevent deformation of the assembly during
lifting. If equipment or space restrictions prevent the use of power
equipment to lift the plenum assemblies, they must be installed
manually. To do this, select a single plenum assembly and disas-
semble it into component pieces, saving all parts and hardware.
Then install the plenum on top of the equipment one piece at a
time, reassembling with the same hardware. It is strongly recom-
mended that only one assembly is disassembled at a time, so the
others may be used as a reference during reassembly, and parts are
not confused.
5.3 Access to equipment
Installation of plenums and ductwork requires access to all sides of
the equipment. If access to the back and sides would be restricted
in the final location, this installation should be done before perma-
nently installing the lineup.
Installing the plenums will obscure the access to the main bus.
Therefore, before installing any plenums or ducts, ensure that all the
bus splices are in place and correctly installed per instructions.
5.4 Exhaust duct
The exhaust ducts consists of the parts shown in
through
. Use the hardware kits provided to assemble the duct
parts.
Figure 19. Exhaust duct components (1).
