User Manual

Rack ATS AP44xx Installation and Quick Start8
Connect the ATS
Plug the ATS into two power sources that are independent of each other. The Rack ATS protects your
equipment by drawing from a secondary power source when the primary source becomes unstable or
unavailable. Without two independent sources, the Rack ATS is unable to protect your equipment.
Source Configurations
NOTICE
• Do not plug an ATS into a generator without the protection of a Double Conversion
On-Line Uninterruptible Power Supply (UPS).
• ATS models are compatible with only a Double Conversion On-Line UPS and not a Line
Interactive UPS. (See White Paper 1 on www.apc.com for more information.)
Source A: Utility A  Generator A  UPS A
Source B: Utility A
Source A: Utility A
Source B: Utility A
Source Configuration Configuration strength
A
B
Utility A  Generator A  UPS A
Utility B  Generator B  UPS B
Best
A
B
Utility A  Generator A  UPS
Utility B
Better
A
B
Utility A  Generator UPS A
Utility A
Good
A
B
Utility A  UPS A
Utility B  UPS B
Good
A
B
Utility A  UPS
Utility A
Good
A
B
Utility A
Utility B
Weak
A
B
Utility A
Utility A
Bad: sources A and B are not
independent
A
B
Utility A  Generator A
Utility B  Generator B
Bad: see NOTICE
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