5
Instruction Booklet
IB01900002E
Effective June 2011
Instructions for Magnum DS Metal-Enclosed
Low-Voltage NEMA 3R Assemblies
EATON CORPORATION
www.eaton.com
2.3.2 Rolling
If during the moving and positioning process it is not feasible to use
an overhead crane, the equipment can be moved on construction
rollers. The heavy steel base on an NEMA 3R assembly is suitable
for use directly when rolling. Use no less than four evenly spaced
rollers for assembly movement. Since equipment length can vary,
each 1.5 to 2.0 feet (457 to 610 mm) of equipment length requires a
roller. As the equipment is carefully moved, the rollers that become
free at the end opposite the movement direction should once again
be placed at the front for continued movement.
2.3.3 Lifting Plate Removal
The lifting plates attached at the base perform the dual purpose of
providing a convenient and robust method of securing the unit to
the foundation. A separate channel base is not required. Once an
assembly is in its permanent location remove the lifting eyes from
the angles (Figure 2). Rotate the angles 180 degrees and reinstall.
Use the holes in the angles to bolt the assembly to the foundation.
Figure 2. Figure 2 Lifting Angle in Place As Received Prior to
Reversing for Securing to Foundation.
2.4 Storage
A fully assembled assembly requires a minimum of care during
outdoor storage. The area should be reasonably free of dirt and
corrosive gases. The space heaters, which are standard with weath-
erproof assemblies, must be energized to prevent condensation.
NEMA 3R assemblies which are not fully assembled must be treat-
ed in the same manner as indoor equipment.
CAUTION
WHEN SPACE HEATERS ARE ENENERGIZED, CARE MUST BE TAKEN THAT
INTEGRAL CONTROL POWER TRANSFORMERS ARE NOT BACK-FED.
DISCONNECT PRIMARY AND SECONDARY FUSES.
During storage, all assemblies, whether indoors or outdoors, should
be placed on a firm, level surface. This will prevent any unneces-
sary strain or possible distortion. Store all other separately packaged
accessory equipment in a clean, dry location. It is recommended
that a waterproof cover be placed over circuit breaker cartons and
the cartons kept in an indoor storage location when the circuit break-
ers are stored separately from the assembly.
Section 3: Equipment Description
3.1 General Description
The following descriptions apply to standard metal-enclosed con-
struction and wiring. Special features and control schemes are often
incorporated per customer specifications. These special features are
evident and portrayed on the drawings and diagrams for the specific
assembly. Instructions on included apparatus such as relays, instru-
ments, control switches and circuit breakers are included elsewhere
in separate instruction books or sheets.
Each low-voltage (600 volts and below) indoor and outdoor metal-
enclosed assembly is factory assembled and tested. It is designed
to require a minimum amount of labor for installation.
Each metal-enclosed assembly consists of a stationary structure that
includes one or more free-standing vertical sections mechanically
and electrically joined to make a single coordinated installation.
In enclosures identified as rear-accessible, a vertical section consists
of three major divisions: the front compartment (breakers), bus
compartment, and cable compartment, wherein the power cables
are accessed through doors located in the rear of the enclosure.
In addition, personnel ingress (and access to the circuit breakers)
is affected either through a walk-in aisleway (Figure 3) or directly
through the front of the enclosure (Figure 4).
In enclosures identified as front-accessible, the three divisions are
redistributed between a pair of vertical sections: front compartment/
bus compartment in one half; cable compartment/bus compart-
ment in the remaining half, wherein the power cables are accessed
through doors located in the front of the enclosure. In addition, per-
sonnel ingress (and access to the circuit breakers) is affected either
through a walk-in aisleway (Figure 5) or directly through the front of
the enclosure (Figure 6).
All Magnum DS Metal-Enclosed Low-Voltage NEMA 3R Assemblies
are a predetermined depth based on one of the four configurations
chosen. Direct transformer connections are easily managed with
rear-accessible units. However, due to the foreshortened design of
front-accessible assemblies, direct transformer connection is not
possible without the aid of a special transition enclosure. If this is
an essential part of an installation, contact an Eaton sales and ser-
vice representative for assistance.
NOTICE
FOR SPECIFIC INFORMATION REGARDING THE INTERNAL CONSTRUCTION
OF MAGNUM DS METAL-ENCLOSED LOW-VOLTAGE ASSEMBLIES,
INCLUDING BUT NOT LIMITED TO CIRCUIT BREAKER INSTALLATION, BUS
CONSTRUCTION AND CABLE/CONDUIT SPACES, REFER TO SECTION 3 OF
IB01901001E, REFERENCED IN SECTION 6 OF THIS MANUAL.
