Specifications

Distribution Products Catalog CA08101001E—October 2010 www.eaton.com 51
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16.4
Tr a n s f er Switches
Magnum-Based Designs
Bypass Isolation Transfer Switch
Contents
Description Page
Floor-Standing Magnum Transfer Switches . . . . . . . . . . . . . 42
Bypass Isolation Transfer Switch
Standards and Certifications . . . . . . . . . . . . . . . . . . . . . . 52
Catalog Number Selection. . . . . . . . . . . . . . . . . . . . . . . . 53
Product Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Technical Data and Specifications . . . . . . . . . . . . . . . . . . 54
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Magnum Closed Transition Soft Load Transfer Switches
with ATC-5000 Controller . . . . . . . . . . . . . . . . . . . . . . . . . 57
ATC-5000 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Bypass Isolation Transfer Switch
Product Description
A bypass isolation switch
utilizes loadbreak isolation
and bypass transfer power
contacts. Thus, should
voltage be lost on the line to
which the ATS is connected,
and should a manual bypass
be required to the other line,
this can be accomplished
safely and quickly as
described below. With
contactor designs utilizing
non-loadbreak isolation and
bypass switches, manual
bypass to the other line is
hindered by mechanical or
electrical safety interlocking.
Application Description
The bypass isolation switch
is designed for applications
where maintenance,
inspection and testing
must be performed while
maintaining continuous
power to the load. This is
typically required in critical
life-support systems and
standby power situations
calling for safe system
maintenance with no power
disruptions. Such a design
allows for the quick removal
of the different switching
devices for inspection,
maintenance or replacement.
Features, Benefits and Functions
Eaton’s transfer switch is
a rugged, compact design
utilizing Magnum power
switches or Magnum power
circuit breakers to transfer
essential loads from one
power source to another.
Open transition switching
devices are interlocked to
prevent both switching
devices from being closed at
the same time. The versatile
design, in addition to standard
transfer functions, offers an
optional integral thermal
and short-circuit protection
in either or both switching
devices.
The switching devices
are in a compact vertical
arrangement. The logic
can be easily disconnected
from the switching device
without disturbing critical
connections. The enclosure
is free standing, and by
using the specially supplied
cleats, the switch is seismic
approved (Option 42). The
terminals are mounted in the
rear of the switch, permitting
rear, top, bottom or side
cable or bus bar entrance.
The switching devices have
a high withstand rating. The
high-speed, stored-energy
switching mechanism
guarantees a transfer time
of less than three cycles.
●
Reliable microprocessor
logic
●
Designed to safely
withstand fault currents
●
Eliminates need for
complex interlocks
●
Most versatile bypass
isolation transfer switch
available
●
Eaton drawout cassette
design
●
Overcurrent protection
available
●
No loadbreak when
bypassing to the
same source
●
Drawout capabilities
on both ATS and
bypass portions
●
Compact design
●
Ability to test power
switching elements
during drawout process
●
Power switching
devices completely
interchangeable between
ATS and bypass portions