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IB ATS-C103
Instructional Booklet
Page
36
Effective: March 2012
Instructions for Installation, Operation and Maintenance of the
Eaton ATC-800 Closed/Open Transition 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
(Energize K2)
Close Source 2 (out of Sync)
(Momentarily energize K4)
Source 1 is powering the load
TDN timer times out
(For Breaker type ATS only)
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)
For 2-position contactor ATS,
TDN timer times out if not
programmed equal to zero
(For 2-position contactor ATS,
TDN is not applicable and hence
recommended to program TDN=0)