Installing Shipping Sections; Setting Shipping Sections; Leveling Of The Switchgear; Leveling Indoor Switchgear - Siemens WL Series Instruction & Installation Manual

Type WL Low Voltage Metal-Enclosed Switchgear
Installation

Installing Shipping Sections

The proper method of installation depends on whether the
switchgear has been shipped as one complete group, or in two
or more shipping sections. The general arrangement drawings
will indicate the shipping sections, vertical section numbers
and their location within the switchgear lineup. Sections are
assembled and wired in accordance with the arrangement as
in the final installation.
Mounting surfaces (sills, slab, piers or pilings) must be level
and in the same plane. Conduits must be properly located and
installed so that they will clear the floor plate cutouts. Mounting
surfaces must be swept free of stones, chips and other debris.

Setting Shipping Sections

After checking each shipping section for its proper location
sequence, as shown on the general arrangement drawing,
move the first section of the switchgear to its location. When
a throat-connected transformer is part of the installation and
in its current location, the switchgear is positioned next to the
transformer as shown in Figures 20 and 21. The switchgear
shipping section should be kept high enough to just clear any
conduits, and then moved toward the transformer throat to
conform to the dimensions shown on the general arrange-
ment drawing.
Align the switchgear with the anchor bolt locations and (simul-
taneously) with the conduit locations. With all points aligned
and with conduit caps and floor plate covers removed, carefully
lower the section to its permanent location.
It is important that the first section be accurately positioned and
leveled as each successive section will depend on the first.

Leveling of the Switchgear

The floor, sills, piers, or pilings must be true and in a level plane.
Within the area of the switchgear, there should be no projec-
tions (such as pebbles, concrete or debris) protruding above
this plate.
To make certain that there has been no distortion of the switch-
gear in shipping or handling, each shipping section should be
checked with a plumb line after it is resting on the permanent
(level) foundation. A plumb line dropped from the top front
corner at each end of the shipping section should verify that the
section is vertical within 1/8" (3.2mm). Out-of-plumb conditions
greater than 1/8" (3.2mm) usually indicate an uneven base, and
shimming may be required.
Courtesy of NationalSwitchgear.com

Leveling Indoor Switchgear

Each section is provided with four anchor bolt locations, as shown
in Figures 9, 10, 11 and 12. Examine these anchor bolt locations
to make certain that the section is in firm contact with the
mounting surface in the area of the anchor bolt. In the absence
of firm contact, shims must be added adjacent to the anchor
bolt holes. These shims will prevent distortion of the section
when anchor bolts are drawn tight. Shims should be approxi-
mately three inches square, and sufficient shims should be
installed to provide firm contact between the section and the
shimmed foundation. Tighten anchoring hardware, and check
for plumb. The act of tightening of the anchoring hardware
should not cause any distortion of the section. If the section
does distort, add additional shims as required. Ensure that
the switchgear frame is in firm contact with the mounting
surface at the rear of the front compartments (19.8" (503mm)
for non-fused breakers or 24.8" (630mm) for fused breakers,
see Figure 10, Dimension E). Shim as required in each section.
If the lineup consists of more than one shipping section, each
successive shipping section should be installed in a similar
manner. Move the second section into place, being certain
that the front panels are aligned with those of the first section.
Check for plumb as was done for the first section. Insert hard-
ware for bolting the two sections together, but do not tighten.
Repeat the leveling, shimming and tightening of anchoring
hardware as on the first section. After this is complete, tighten
the hardware holding the two shipping sections together.
Repeat this procedure for each shipping section in the line-up

Leveling Outdoor Switchgear

Plumbing and leveling outdoor equipment is basically the same
as for indoor. When resting on its permanent foundation, the
sections should be plumb within 1/8" (3.2mm). Unlike indoor
switchgear, outdoor equipment is anchored using studs or
J-bolts grouted into the foundation, and with clamp washers
gripping the switchgear base. Examine the area adjacent to
each anchor bolt to make certain that the base is in firm con-
tact with the mounting surface. If these are areas adjacent to
these studs which are not in firm contact with the mounting
surface, shims must be added as described for indoor units.
These shims must prevent distortion of the base when anchor
hardware is tightened. With all points of contact checked, and
shipping section properly located, tighten anchor hardware.
Ensure that the switchgear base is in firm contact with the
mounting surface at the front instrument panel location (refer
to Figure 12). Shim as required at sides of shipping section.
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