7
Instructional Leaflet
IB48041
Effective December 2009
Instructions for AMPGARD 400A
medium voltage starter
eaton corporatIon
www.eaton.com
Danger
De-energize anD lock out all incoming power connections
at their source before servicing any part of the equipment
Directly connecteD to the incoming power, incluDing main
horizontal bus, vertical bus, bus potential transformers,
or control power transformers.
Review the order drawings supplied with the equipment for informa-
tion on the incoming connections for your specific equipment.
Ensure that all connections are tight and of the proper ampacity
to carry the rated load. Cables should be properly supported and
braced, with special attention to ensure that the insulation is
protected from damage.
Load cable termination
Load cable terminations are typically located in the left rear of the
controller compartment. Refer to
Figure 14
for location details.
In reduced-voltage starters, the terminations are located in the
reduced-voltage compartment. Load cables may exit either the top
or bottom of the structure. Ensure that the factory-supplied phase
barriers are installed before energizing the starters. Failure to install
the barriers can result in a flashover at the load connections.
Figure 14. Customer Load Connections, Shown with optionally
Supplied Lugs
In two-high controller arrangements, the cables from one controller
must pass through the controller located either above or below. An
isolated steel cableway is provided for these cables. Special barriers
are provided to enhance this isolation. The order drawings will state
if the factory construction was set up for top or for bottom entry of
cables. If the actual entry of cables is different than the factory set-
ting, the special barriers can be removed and reinstalled in the other
controller compartment to facilitate entry from the other direction.
Figure 15. Medium Voltage Cable Isolation Barriers
Top-exiting cables pass through the left rear area of the main bus
compartment. For two-high construction, the cable area includes
a barrier to isolate the cables from the two starters. The front area
should be used for access to the top controller, the rear area should
be used for access to the lower controller.
Figure 16. Medium Voltage Cable Conduit Area (View from Top
Rear of Bus Compartment)
Control connections
Control wires may enter the enclosure from either the top or the
bottom. For lineups with main bus, a low voltage wireway is located
in the left front of the bus compartment to facilitate top entry of
control wiring. For controllers where bottom entry is used, wires
enter the lower left front of the enclosure. Refer to the order-
specific drawings for specific locations for control wireways.
Steel channels are provided for the isolation of control wires in two-
high construction. For top entry of control wires, the lower starter
wiring should pass behind the channel in the upper compartment.
For bottom entry of control wires, the top starter wiring should pass
behind the channel in the lower compartment. The order drawings
will state if the factory construction was set up for top or for bottom
entry of control wires. If the actual entry of wires is different
than the factory setting, the special barriers can be removed and
reinstalled in the other controller compartment to facilitate entry
from the other direction.
Figure 17
below illustrates the barriers
for top entry of low voltage wires.
Figure 17. Low Voltage Terminal Blocks and Vertical Wireway
A fixed row of terminal blocks for control connections is located in
the left front of the controller compartment. The starter isolation
switch should be in the disconnected position and the medium
voltage door open for wiring access to these terminal blocks.
When top entry of low voltage wiring is used, make sure that the
wiring for the top starter is routed to the left and secured using wire
ties as soon as possible to prevent interference with the low voltage
control compartment when the medium voltage door is closed.
Some wiring may need to be connected to devices on the low
voltage door or in the low voltage compartment. Wiring to these
devices should come through one of the wire cutouts in the
bottom left of the low voltage compartment. Make sure that there
is sufficient slack in the wiring to allow the medium voltage door to
open properly.
A horizontal low voltage wireway is located at the bottom front of
each lineup. The equipment ground bus is also located in the wire-
way. This area may be used to route control wires that must pass
from one structure to another.
Move Barriers to Starter
Above or Below if Cable
Entrance is Different from
Factory Configuration
Low Voltage
Wireway
Barriers (move
to lower starter
if bottom entry)
Low Voltage Wire
Space from Bus
Compartment
Terminal
Blocks
