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12
Installation
Low Voltage Arc Resistant Switchgear (LVSWGR-AR
®
)
Equipped with Magnum DS Circuit Breakers
01.4IB.26263B
2. Equipment designed for outdoor exposure
may be stored either in indoor or outdoor
storage locations. The equipment must
be protected from airborne external
contaminates if stored outdoors. Outdoor
storage will also require additional care
to maintain temporary covers over
the openings and shipping splits. The
equipment must be provided with control
power to facilitate the energization of
space heaters, as well as other temperature
and humidity controlling equipment. The
temperature should be kept above freezing
(>33°F/1°C) and below (<140°F/60°C). The
relative humidity should be kept below
60% or a dew point of 15°C/59°F. The
equipment should be stored in such a
manner as to leave all doors and panels
accessible for inspection. The equipment
must be inspected on a routine basis to
assure its integrity.
3. The auxiliary control devices, ship loose
material and protective relays must also
be protected. This includes items such as
battery chargers, UPS systems, lighting,
installation hardware and air conditioning.
If prolonged storage is anticipated,
humidity controlling desiccant materials
should be utilized. Desiccant packets
should be installed in all compartments and
packing containers.
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1) Drawings and Diagrams
Before any installation work is done, consult
and study all drawings and Bill of Materials
furnished by Powell for the particular
order. The drawings include arrangement
drawings and wiring and schematic
diagrams.
The recommended aisle space for the
front and at the rear of the metal-enclosed
switchgear is shown on the floor plan
drawing furnished for the particular order.
The space at the front must be sufficient
to permit insertion, withdrawal, and
transferring of the circuit breakers. The
space at the rear must be sufficient for
installation of cables, for inspection and
maintenance. The dimensions shown on
the switchgear drawings are those required
for proper operation of the switchgear.
When three or more sections are to be
arranged in one continuous line-up,
the center section should be the first to
be located. The other sections should
be installed in successive order in each
direction from the center of the structure.
When installing a unit substation or power
center, the power transformer and the
adjacent metal-enclosed switchgear line-up
should first be lined up and set in position
in accordance with the dimensions on
the base plan drawing for the installation.
The additional sections should then be
installed.
Establish a base line located a few inches in
front of the sections and parallel with the
desired front of the structure. Equalize the
distances from the front of the sections to
the base line to make the face of the group
parallel to the base line.
Applicable national or local codes or
regulations may require greater aisle space
than is needed for operation of the
metal-enclosed switchgear. It is the
purchaser’s responsibility to comply with
these codes and regulations.
CAUTION
