Woodward DTSC-200A - Chapter 3. Functional Description; General ATS Functionality Flowchart

Manual 37941A DTSC-200A - ATS Controller - Operation
© Woodward Page 19/37
Chapter 3.
Functional Description
General ATS Functionality
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The following flowchart shows the typical ATS functionality:
Source 1 is
available
Close breaker to
Source 1
Source 1 is powering the load
Source 1 fails
„S2 start delay
timer“ expires
Send „engine
start“ signal ( de-
energize „engine
start“ relay )
Source 2
available ?
No
Source 2 stable
timer expires
Yes
Perform transfer to
Source 2
Source 2 is powering the load
Source 1
available ?
No
Source 1 stable
timer expires
Source 1 is powering the load
Engine cooldown
timer expires
Remove „engine
start“ signal
(energize Gen
start relay )
Motor load
disconnect
feature ON ?
Set Motor load
disconnect signal
No
De-energize
„Motor Load
Disconnect“ Signal
Perform transfer to
Source 1
Elevator pre-
signal feature
On ?
Set elevator pre-
signal
Motor load
disconnect
feature ON ?
Set motor load
disconnect signal
No
No
De-energize
„Elevator pre-
signal“
De-energize
„Motor Load
Disconnect“ Signal
Figure 3-1: General ATS functionality - flowchart