Instructional Booklet
Page
34
Effective: March 2012
Instructions for Installation, Operation and Maintenance of the
Eaton ATC-800 Closed/Open Transition Transfer Switch Controller
For more information visit: www.eaton.com
IB ATS-C103
Appendix E: Operational Flowcharts
•
Utility - Generator Transfer Switch
•
Dual Utility Transfer Switch
•
In-phase Transition Implementation
•
Closed/In-phase/Open Transition Flowchart
Source 1 is available
Is Source 2
available?
Close Source 2 breaker
(Momentarily energize K4)
N
Utility - Generator Transfer Switch
Close Source 1 breaker
(Momentarily energize K3)
Source 1 becomes unavailable
(or Engine Test, Plant Exerciser, Go To Emergency)
TDES timer times out
Send “Engine Start” signal
(Energize Gen Start relay)
TDNE timer times out
Open Source 1 breaker
(Energize K2)
Y
Source 2 is powering the load
TDEN timer times out
Open Source 2 breaker
(Energize K1)
Close Source 1 breaker
(Momentarily energize K3)
N
Is Source 1
available yet?
Y
Source 1 is powering the load
TDN timer times out
(if Option 32A is enabled)
TDN timer times out
(if Option 32A is enabled)
Source 1 is powering the load
TDEC timer times out
Remove “Engine Start” signal
(De-energize Gen Start relay)
Send Pretransfer signal. TPRE times out.
(if Pretransfer enabled)
Send Pretransfer signal. TPRE times out.
(if Pretransfer enabled)
