Marathon TSC 900 - Open Transition In-Sync Transfer (Model X); Closed Transition Operation (Model 3 & 4)

TSC 900 TRANSFER SWITCH CONTROLLER
PM 151 REV 1 15/10/08 Thomson Power Systems
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4.5.1. OPEN TRANSITION IN-SYNC TRANSFER OPERATION (MODEL X)
If the ATS is supplied with ATS Model X feature (i.e. Open Transition – In-sync
Transfer), the ATS will operate as per automatic sequence of operation (open
transition) however all transfers will occur using in-sync transfer control sensing instead
of neutral delay control logic. All In-sync transfer operations will occur only when both
sources of power are available and within normal operating limits. Note: Open
Transition In-sync Transfer operation is only possible if the ATS mechanism is
equipped for in-sync operation and optional feature is enabled in Settings. Refer to
Section 5.10.10 for further details.
4.5.2. CLOSED TRANSITION OPERATION (MODEL 3 & 4)
If the ATS is supplied with any of the Closed Transition Transfer features, the CLOSE
TRANSITION control selection will be provided on the GHC display via the Change
Mode button selection.
When the CLOSE TRANSITION button is selected, a pop-up screen will appear
showing operation mode selections as shown below;
The current operating transfer mode” is displayed in the Transfer Mode Window as
shown. To change to a different operating mode, select the following;