Specifications

Distribution Products Catalog CA08101001E—October 2010 www.eaton.com 57
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16.4
Tr a n s f er Switches
Magnum-Based Designs
Magnum Closed Transition Soft Load Transfer Switch with ATC-5000 Controller
Contents
Description Page
Floor-Standing Magnum Transfer Switches . . . . . . . . . . . . . 42
Bypass Isolation Transfer Switch . . . . . . . . . . . . . . . . . . . . . 51
Magnum Closed Transition Soft Load Transfer Switches
with ATC-5000 Controller
Application Description . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Features, Benefits and Functions . . . . . . . . . . . . . . . . . . 58
Catalog Number Selection. . . . . . . . . . . . . . . . . . . . . . . . 62
Product Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Technical Data and Specifications . . . . . . . . . . . . . . . . . . 64
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
ATC-5000 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Magnum Closed Transition Soft Load Transfer Switches with ATC-5000 Controller
Product Description
Electrical power generation
located at or near the point of
its consumption, commonly
referred to as distributed
generation, has seen
tremendous growth recently
due to factors such as limited
utility grid generation and
transmission capacity
combined with the onset of
utility deregulation. Strong
economic incentives now
exist for many users to
consider on-site self-
generation for both improved
power reliability and energy
cost reduction. Additionally,
these opportunities have
spurred the development of
new and unique types of
generating and switching
technologies.
Eaton closed transition soft
load automatic transfer
switches are just such a
technology. Closed transition
soft load transfer switches
are an ideal solution for
power availability, energy
management and generator-
set exercising applications.
Unlike traditional open
transition switches that
provide a break-before-make
operation, the closed
transition soft load switch
allows two power sources,
usually the utility and a
generator set, to be paralleled
indefinitely. This permits the
load, inductive or resistive, to
be gradually and seamlessly
transferred from one source
to another. All of this is
accomplished through the
make-before-break operation
of the switch with no power
interruption to the load.
Eaton closed transition soft
load switch utilizes an
integrated micro-processor-
based power controller to
make active paralleling of two
power sources
possible. It
manages the speed governor
and voltage regulator of the
generator set to bring the two
sources into synchronization.
This approach allows the
transfer switch to be applied
in soft load transfer
applications. In addition, it
can also be used as a peak
shaving switch helping
customers to reduce
their
peak demand charges by
paralleling
the generator set
with the utility source during
times of high electrical
demand.
Standard fixed drawout or
drawout bypass isolation
configurations are available
with or without an integral
service entrance rating. If a
switch with a service
entrance rating is used as
service entrance equipment,
the need for separate service
disconnects and overcurrent
protective devices is
eliminated.
Eaton closed transition soft
load automatic transfer
switches are available for
800 through 3200A, up to
600 Vac, 50 or 60 Hz
applications worldwide.
They are offered in both
indoor (NEMA 1) and outdoor
(NEMA 3R) free-standing
enclosures utilizing drawout
or fixed insulated case
Magnum DS switching
devices. The Magnum DS
switching device is a 100%
rated device with a 100 kA
interrupting capability at
600 Vac.