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AKD-20 AR / Entellisys AR Low-voltage Switchgear
Section 5. Exhaust Plenum Installation
Section 5. Exhaust Plenum Installation
General
The exhaust plenum system (Figure 5.1) is a metallic duct that
is attached to the plenum flange located on the top of the
switchgear. The exhaust plenum will run across the entire
length of the equipment and is attached to a plenum flange
for each individual section (Figure 5.2).
NOTICE: The minimum unobstructed ceiling height from
the base of the switchgear is 10 feet to install the exhaust
plenum system.
The exhaust plenum duct is shipped separately for installation
at the customer's site.
The instructions here pertain to how the exhaust plenum
system is installed on top of the switchgear and requirements
for the end duct installation. Refer to the customer's
specification/construction drawings for routing, installation
and requirements for the exhaust plenum system between
the end flange on the equipment and the end exhaust portal.
The portion of exhaust plenum system between the transition
adapter and the end exhaust portal (Figure 5.1) may or may
not be provided be the General Electric Company. Adherence
to the design requirements in this manual is required when
constructing this area of the exhaust plenum system.
WARNING: The exhaust plenum system is an integral
component of the arc resistant rating of the equipment.
Energizing and operating the equipment without a properly
installed exhaust plenum system will negate the arc
resistant rating.
The exhaust plenum above each section of equipment will
match the width of that specific section. An access cover
(Figure 5.1) is provided in each exhaust plenum above the
switchgear to facilitate the installation.
NOTICE: Prior to installing the exhaust plenum system, the
switchgear shipping splits must be assembled and
anchored to its foundation. Failure to follow this sequence
may result in a misalignment of the exhaust plenum
system.
37
Courtesy of NationalSwitchgear.com
Figure 5.1 Exhaust plenum system (front view)
Exhaust Plenum Section (above equipment)
(1)
End Cap
(2)
Exhaust Plenum Transition Adapter
(3)
Exhaust Plenum Duct (provided by others)
(4)
Exhaust Plenum End Portal
(5)
Access Cover (typical)
(6)
Figure 5.2 Exhaust plenum system (rear view)
End Cap
(1)
Plenum Flange (typical for each section)
(2)
©2016 General Electric. All rights reserved.
DEH-41473
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