molded case circuit breakers - Eaton Canada

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REPLACEMENT CAPABILITIES
Synchronous Control Retrofit Using
Mark V Solid-State Control
To include replacing existing relay type
synchronous control with state-of-the-art
Solid-State Mark V control. Refer to
AMI Starter Retrofits
IQ Retrofit Kits
STARTERS (MEDIUM VOLTAGE)
AMI AMPGARD Assemblies, Retrofit Kits
and Renewal Parts
PRODUCT DESCRIPTION
Originally a Westinghouse Product
The AMI design AMPGARD starter, introduced
in 1957, was a complete line of starters
for magnetic control of squirrel cage,
wound rotor and synchronous motors.
The AMI was the first front accessible
starter and was available with air break
(type H) or oil immersed (type K) contactors.
The standard AMI for full voltage
starting was 30 inches deep, 38 inches
wide and 90 inches high. All components
were accessible from the front through
three doors opening into separate compartments.
The top compartment enclosed
the isolating switch and current limiting
power fuses. The middle compartment
enclosed the AC low voltage control panel,
and behind it, the CTs. The bottom compartment
housed the contactor.
TECHNOLOGY UPGRADES
Standard AMI 36-inch Wide Vacuum
Starter Retrofit Kit
This kit is used to include a standard full
voltage non-reversing vacuum starter in a
welded cell assembly with horizontal top
barriers and deep flanged doors. It will
retrofit the AMI designs that are at least
36 inches wide and 30 inches deep. The
cell is 45 inches high.
Refer to RPD 8855C, for more details.
Style No. 2147A95G41
Narrow AMI 30-inch Wide Vacuum
Starter Retrofit Kit
This kit is used to include a standard full
voltage non-reversing vacuum starter in a
welded cell assembly with horizontal top
barriers and deep flanged doors. It will
retrofit the AMI designs that are at least
30 inches wide and 30 inches deep. The
cell is 58 inches high.
Refer to RPD 8855C, for more details.
Style No. 2147A95G42
pages 186-189, 192 of this publication for
synchronous motor field control panels.
Add-on Structure
New add-on vacuum structures as an
extension to the AMI type structure may
* Upper filler cover may require field modification.
IQ Surface Mounting for IQ Products
Includes drilling for (one) IQ device and
(three) 30mm devices. Supplied with
or without IQ and PB devices. Refer to
RPD 8855C for more details.
IQ Floor Mounted Enclosure for Mounting
IQ Products
Includes standard AMPGARD structure
construction to be used as a line-up
As a note, the pre-AMI design was a rear
access assembly with two compartments–
current limiting fuses on the
top and the contactor below.
Ratings (maximum)
400A
1500 HP @ 2500V; 2500 HP @ 5000V
Chronology
The AMI design AMPGARD was manufactured
from 1957 until 1970 at the General
Control Division in Buffalo, NY and
Westinghouse Manufacturing and Repair
(M&R) facilities around the country. The
air contactor was available through 1966.
The oil contactor was available through
1970.
be connected directly to the main bus
without a transition section using special
bus links. Contact your local Cutler-Hammer
Field Sales Office.
extension. Each 10-inch wide, 90-inch high
and 30-inch deep section comes with (two)
doors, each with a works-in-a-drawer drawout
panel. Each door has (three) standard
IQ cutouts with device panels. Supplied
with or without IQ and PB devices. Refer
to RPD 8855C for more details.
March 2001