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6. Configuration and Operation
6.1 Automatic Transfer Switch
When the Source A and Source B inputs are both connected to power sources, the ATS operates
as an Automatic Transfer Switch, providing redundant input power for high availability applications.
The ATS will distribute power from the preferred input source under normal operating conditions
and switch to the other input source under abnormal conditions. The default preferred source is
Source A (Refer to the Navigating Config Menus and Submenus section for instructions on
changing the preferred source). The ATS will switch to the preferred source whenever it is "Good"
according to the ATS input voltage definitions (see section 6.1.2).
6.1.1 Preferred Configuration
The Automatic Transfer Switch function provides increased availability when the Source A and
Source B inputs of the ATS are connected to separate power sources. For maximum availability, it
is recommended when using UPS systems that the UPS systems are matching with pure sine wave
output for the Source A and Source B input power sources. The automatic transfer switch function
will be compromised if the Source A and Source B inputs are connected to the same utility power
source.
Utility B
16-01-031-933588.indb 20
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Equipment
Loads
Power Strip
20
Utility A
Source B
Power Source
Source A
Power Source
Source A
Input Cord
Source B
Input Cord
ATS
3/22/2016 4:14:25 PM
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