TSC 800 TRANSFER SWITCH CONTROLLER
PM 049 REV 10 08/09/25 Thomson Technology
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To Exit the Test Mode:
• Using the ENTER pushbutton, scroll to the ATS Mode Menu.
• Using the INCREMENT pushbutton, select the Yes message and press the
ENTER pushbutton.
• Using the INCREMENT pushbutton, select Auto.
• Press the ENTER pushbutton. After the Utility Return Timer has expired the
transfer of the load from the generator to the utility supply will be initiated.
6.4.2 AUTOMATIC PLANT EXERCISE TEST
To initiate an automatic plant exercise test mode, the TSC 800 must be pre-
programmed for the desired start/stop times, frequency of the test and type of test (i.e.
Onload, Offload).
Refer to the Programming section for details on programming.
Once the plant exercise timer is programmed, the engine will immediately start at the
selected time and transfer on load (if Onload is selected) once nominal voltage and
frequency levels have been obtained. The engine will remain operating until the stop
time is reached, then the load will re-transfer back to the utility supply after the utility
return timer has expired. The generator will repeat the test sequence as programmed.
6.4.3 FOUR FUNCTION REMOTE TEST (FTS4 OPTION)
The function of the Four Position Test Switch Input is to allow operators to select
various operating scenarios for test or maintenance purposes, in addition to the use of
the faceplate mounted pushbuttons.
NOTE: When an external FTS4 switch is used, the TSC 800 operation will be based
on the highest priority of either the internal ATS Mode or the external FTS4 inputs to
the controller.
Mode Priority: 1 Off, 2 Onload Test, 3 Offload Test & 4 Auto
Off: Disables the engine start output from the transfer switch
(FTS4 only). TSC 800 will display “Controller Out of
Service”. All transfer logic outputs are dropped out
(disabled). The transfer switch will not provide automatic
control in the event of a power failure. Engine start output on
the controller is dropped out. (Place generator controls in
OFF if continuous running of the generator is not desired.)
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