TSC 800 TRANSFER SWITCH CONTROLLER
PM 049 REV 9 06/04/24 Thomson Technology
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6.8 MANUAL UTILITY RE-TRANSFER
If the TSC 800 is programmed to provide a Manual Utility Re-transfer Sequence, an operator
must initiate the re-transfer sequence when the utility supply has returned to normal following
a utility power failure and TSC 800 LCD message “ Util Return” – “Press Lamp Test “.
NOTE:
Manual Re-transfer feature is provided in TSC 800 Software
version 2.0 (or higher). Programmed Utility Return Delay Time
is not included to ensure stable utility supply prior to retransfer.
6.9 SERVICE ENTRANCE ATS MODE
For transfer switches equipped with the Service Entrance Mode option, the TSC 800 is
configured to provide additional logic for the application. When the TSC 800 controller
receives an input signal for Service Entrance Mode (contact closing on TB2-15) the TSC 800
will post an alarm message on the LCD display “ Service Disconnecting” when sourcing
neutral position and when both Load on Generator and Utility inputs are de-energized and the
load bus is de-energized will display “Service Disconnected”. The control logic required to
move the ATS mechanism to the neutral position is controlled by external logic and not by the
TSC 800. When in “Service Disconnect” mode all transfer logic outputs are de-energized.
When “Service Disconnect” mode is removed the controller will display “Returning to Service”
and move to the appropriate source depending on availability within programmed limits.
NOTE: On return to Normal Service the Engine Start output is inhibited (held up) for
approximately 8 – 10 seconds. Requesting another mode of operation during this time, which
requires the engine start contact to close, will be ignored.
NOTE:
Service entrance feature is provided in TSC 800 Software version 2.0
(or higher).
6.10 PHASE BALANCE PROTECTION ALARM
When the TSC 800 is programmed with Phase Balance protection enabled, should a transfer
occur due to an out of limit phase balance condition, an alarm message will be shown on the
TSC 800 LCD display “UTIL (or GEN) UNBALANCED”. The Phase Balance feature may be
user programmed to provide two different re-transfer operating sequences (i.e. AUTO or
MANUAL RETRANSFER).
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