Specifications

Instructional Booklet
Page 14 Effective: May 2006
O&M Manual for the Eaton ATC-100
Automatic Transfer Switch Controller
For more information visit: www.eatonelectrical.com IB01602019E
Appendix A: Operational Flowchart
Utility is available
Close Utility switching device
(Momentariily energize K1)
Utility is powering the load
Utility becomes unavailable
(or System Test, Generator Test)
TDES timer times out
Send "Generator Start" signal
(Energize Gen Start relay)
Is Generator
Available?
TDNE timer times out
Open Utility breaker
(Momentarialy energize K2)
Close Generator breaker
(Momentarily energize K2)
The generator is powering the load
Is Utility
available yet?
TDEN timer times out
Ye s
No
No
Ye s
Open Generator breaker
(Momentarily energize K1)
Close Utility breaker
(Momentarily energize K1)
Utility is powering the load
TDEC timer times out
Remove "Engine Start" signal
(De-energize Gen Start relay)