Specifications

16 Distribution Products Catalog CA08101001E—October 2010 www.eaton.com
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16.2
Tr a n s f er Switches
Contactor-Based Designs
Bypass Isolation Transfer Switch
Contents
Description Page
Automatic Open Transition, 40–1200A . . . . . . . . . . . . . . . . 8
Automatic Closed Transition, 40–1200A . . . . . . . . . . . . . . . 12
Bypass Isolation Transfer Switches, 40–1200A,
Dual Drawout
Standards and Certifications . . . . . . . . . . . . . . . . . . . . . . 18
Catalog Number Selection . . . . . . . . . . . . . . . . . . . . . . . 18
Technical Data and Specifications . . . . . . . . . . . . . . . . . . 18
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Bypass Isolation Transfer Switches, 40–1200A,
Fixed Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Bypass Isolation Transfer Switches, 40–1200A, Dual Drawout
Product Description
A bypass isolation transfer
switch may be used to
provide emergency power to
life safety and other critical
loads where maintenance
of the main transfer switch,
without interruption of power
to the load, is either desirable
or required.
Application Description
Eaton’s Automatic Transfer
Switch is designed to provide
unmatched performance,
reliability and versatility for
critical standby power
applications. The switches
can be equipped with the
ATC-300 or ATC-800
controllers to match your
application needs.
Features
Industrial Design Highlights
●
Front access is a standard
feature on all ratings
●
Entry:
●
Top, bottom or both
●
Isolated compartments
●
Improved safety:
●
Isolated compartments
with barriers
●
Single motion rack-out
with doors closed
●
Ability to test power
switching elements
during drawout process
●
Dual ATS capability—
bypass contactor can be
controlled by the ATS
controller in the bypass
mode of operation
●
Installation flexibility:
●
Field entry/exit locations
can be modified in the
field
●
Interchangeable
drawout contactors
●
Field-selectable multi-tap
transformer panel permits
operation on a wide range
of system voltages
●
Dual drawout
Standard Features
●
Drawout cassette design
on both ATS and bypass
●
No service interruption in
bypass to the same source
●
Source available contacts:
●
Source 1 present
2NO and 2NC
●
Source 2 present
2NO and 2NC
●
Switch position contacts:
●
Source 1 position
1NO and 1NC
●
Source 2 position
1NO and 1NC
●
Source 1 and Source 2
sensing:
●
Undervoltage/
underfrequency
●
Overvoltage/
overfrequency
●
Three-phase rotation
protection
(ATC-300 only)
●
Three-phase voltage
unbalance/loss
(ATC-300 only)
●
Pretransfer signal
contacts 1NO and 1NC
(open transition only)
●
Go to Source 2
(EMERGENCY)
●
Field-programmable
time delays:
●
Time delay engine start:
0–1200 seconds
●
Time delay normal
to emergency:
0–1800 seconds
●
Time delay emergency
to normal:
0–1800 seconds
●
Time delay engine
cooldown:
0–1800 seconds
●
Time delay emergency
failure: 0–6 seconds
●
LCD-based display for
programming, system
diagnostics and Help
menu display
●
Mimic diagram with source
available and connected
LED indication
●
Time-stamped history log
●
System TEST pushbutton
●
Programmable plant
exerciser—OFF, daily,
7-, 14-, 28-day interval
selectable run time
0–600 minutes no load/
load with fail-safe