7
S I T E P R EPA R AT I O N
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Site preparation
General
Before installing, consult all drawings furnished
for the particular order. The drawings show top,
front and section views of the lineup, primary
and secondary connection diagrams and bills of
materials. Study these drawings and the following
recommendations before preparing the site plan
drawings. On commencement of installation on
site, the switchgear room must be completely
finished, provided with lighting and the electricity
supply, be lockable, dry and have facilities for
ventilation. All the necessary preparations, such
as wall openings, ducts, etc., for positioning the
power and control cables up to the switchgear
must already be complete.
The ceiling height must also be checked
considering the top-mounted ventilation.
Warning: Drilling or punching of holes in the
equipment in any way will affect the integrity
of the switchgear. Consult the factory engineer
before proceeding.
Location
Locate the lineup in accordance with local
regulations. Clearances at the front should allow
for installation and removal of the draw-out
equipment. A minimum of 7' 3" is recommended.
Provide rear access of 4' minimum for making
connections before start-up and for periodic
inspections and maintenance. Breaker doors
can swing 115o with adjacent doors closed.
Foundation
The ABB factory supplies general arrangement and
floor plan drawings for each installation. Refer to
these drawings for floor leveling requirements. The
finished floor under and in front of the switchgear
lineup should be smooth, and must not extend
upwards above the switchgear floor line. Floor
leveling requirements are +0.0" to -0.25" over a
linear distance of 20'.
For installations with concrete floors, install all
power and secondary (control) conduits before
moving the units to the site. Available space for
the conduits appears on the floor plan drawings
supplied with the switchgear. Conduits should not
extend more than one inch above the station floor
level. Plug conduit openings before pouring
concrete.
For installations with steel floors, i.e.,
prefabricated metal buildings, cutouts for cable
entry should not extend outside the space provided
in the ReliaGear
®
ND frames as shown on the floor
plan drawings.
Summary of Contents for ReliaGear ND
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