6
Instructional Leaflet
IB48041
Effective December 2009
Instructions for AMPGARD 400A
medium voltage starter
eaton corporatIon
www.eaton.com
Current transformers
A three-phase current transformer (CT) is provided as standard on all
starters. The standard mounting location for the CT is under the con-
tactor load connection assembly. The three CTs in the assembly are
provided with the proper ratio and output burden to work properly
with the overload relay supplied in the control compartment.
Figure 12. Standard CT Mounting
Main bus
AMPGARD lineups are typically supplied with copper main bus. The
bus is located in a 12-inch-high bus compartment mounted at the
top of the lineup. Bus may be rated 1000, 1200, 2000, or 3000A.
The standard bus is uninsulated and tin plated. Optional insulation
and silver plating are available. Bus specifications can be found on
the job-specific order drawings.
Figure 13. Main Bus Compartment, Top View
The main bus compartment in a starter section includes vertical
bus drops to connect the starter(s) to the main bus. Also included
are wireways for routing of motor load and control cables to the
starters below.
Installation
Handling
An AMPGARD controller is insulated for high voltages and must be
protected against damage during handling. The controller should
remain in an upright position at all times.
Exercise extreme care during any movement and placement
operations to prevent dropping or unintentional rolling or tipping.
AMPGARD medium voltage equipment may be moved by forklift,
rollers, or overhead crane.
A forklift is usually the most convenient method of handling the
controller. Use safety straps around the protective packaging
material when handling the controller with a forklift. Insert the forks
under the shipping skid. Do not allow the end of the forks to enter
the bottom of the enclosure.
Rod or pipe rollers provide a simple method for moving the
controller on a level floor. The bottom of the AMPGARD structure is
designed to be rolled without damage on minimum 2-inch diameter
rollers, four rollers per 36-inch section.
AMPGARD controllers are shipped with two steel lifting angles,
one in front and one in back, running the full width of the shipping
section. Back-to-back units also have one in the back and one in the
front, running the full width of the shipping section. Select or adjust
the rigging lengths to compensate for any unequal distribution
of the load, and maintain the controller in an upright position.
Some controller interiors may contain heavy equipment, such as
transformers, that can make the center of gravity vary considerably
from the center of the lineup.
Do not allow the angle between
the lifting cables and vertical to exceed 45 degrees.
Do not pass
ropes or cables through the lift holes. Use slings with safety hooks
or shackles of adequate load rating.
Each controller is properly adjusted at the factory before
shipment. However, vibration and mechanical stresses imposed
by transit and installation can adversely affect mechanical
interlocks and other adjustments; therefore, a final inspection
is essential before energizing. If this inspection reveals any
portion of the controller has come out of adjustment, the
controller should be readjusted according to information in
this instruction book or by a qualified Eaton service engineer.
Storage
If it is necessary to store an AMPGARD controller before installation,
keep it in a clean, dry location with ample air circulation and heat
to prevent condensation. Like all electrical apparatus, an AMPGARD
controller contains insulation that must be protected against dirt
and moisture.
Mounting
AMPGARD controllers should be installed on a non-combustible
level surface of sufficient strength to properly support the control-
ler’s mass. After the lineup has been placed in position, anchor bolts
may be installed and tightened. Refer to the job-specific order
drawings for the bolt locations. The use of half-inch diameter bolts
is recommended.
Equipment located in certain seismic zones must be anchored to
meet the requirements of those zones. Refer to Eaton I.B. 48042
for instructions on mounting in these special locations. It is the
user’s responsibility to ensure the mounting pad is sufficiently strong
to properly anchor and support the equipment.
When an order includes two or more shipping sections, the order
outline drawing will show the sequence in which the sections are
to be lined up and which shipping splits are to be joined. A bus bar
splice kit and a connecting hardware kit are supplied for each open
joint between sections.
Place the first shipping split into position. Move the second
shipping split into position alongside the first, and use the six or
eight 3/8 x 1.50-inch bolts and companion hardware to connect the
two sideplates. Place one flat washer under the bolt head and one
flat washer and one lock washer under the nut. Tighten each bolt to
25 lb-ft (33 Nm).
Bus splicing
Connect the bus bars using the splice kit, including hardware
(3/8-inch diameter) that is provided with the equipment. Tighten
bolts to 25 lb-ft (33 Nm).
Power connections
Incoming power connects to the lineup in a variety of ways. Cables,
bus from other close-coupled equipment, busduct, and transformer
shunts are some of the more common methods. Note that these
connections may be energized even when the starter isolation
switch or other switching devices are in the open position.
Ground
Fault CT
High-
Interrupting
Contactor
Code Plate
Phase Barriers (4)
Three-Phase CT
Ground Bus
Main Bus
(3000A
shown)
Vertical
Bus
Low Voltage
Conduit
Space
Upper Starter
Medium
Voltage
Conduit Space
Lower Starter
Medium
Voltage
Conduit Space
