
IB ATS-1005
For more information visit: www.eaton.com
Instructional Booklet
Effective: March 2010
Page
35
Instructions for Installation, Operation and Maintenance of the
Eaton ATC-600 Automatic Transfer Switch Controller
Source 1 is available
Is Source 2
available?
N
In-phase Transition Implementation
Close Source 1 breaker
(Momentarily energize K3)
Receive request to transfer to Source 2
(Engine Test, Plant Exerciser, Go To Emergency)
TDES timer times out
Send “engine start” signal
(Energize Gen Start relay)
TDNE timer times out
Y
Source 2 is powering the load
Energize Alarm relay
Open Source 1 breaker
(Energize K2)
Close Source 2 breaker
(Momentarily energize K4)
Source 1 is powering the load
TDN timer times out
Source 2 is powering the load
Sources
synchronized
before Sync timer
times out?
Sync timer starts timing
Open Source 1 breaker
(Energize K2)
Close Source 2 breaker
(Momentarily energize K4)
Y
N
Send Pretransfer signal. TPRE times out.
(if Pretransfer enabled)