TSC 900 TRANSFER SWITCH CONTROLLER
PM 151 REV 1 15/10/08 Thomson Power Systems
NO (DISABLED): The Automatic Sync Initiate Output will stay energized to
continue an auto synchronizing operation irrespective if the “Fail to Auto Sync”
timer expires or not.
YES (ENABLED): The Automatic Sync Initiate Output shall be de-energized
upon expiry of the “Fail to Auto Sync” time delay setting to halt further auto sync
operation.
5.10.9. MANUAL UTILITY RETRANSFER CONTROL
The TSC 900 transfer switch controller contains a “MANUAL UTILITY RETRANSFER
CONTROL” feature, which allows an operator initiated re-transfer sequence to occur
when utility power has returned following a power failure. This feature is user
programmable and allows 2 different functional settings which are described below:
NO (DISABLED): The transfer switch will automatically re-transfer back to the
utility supply if within nominal pre-programmed limits and following expiry of the
Utility Return Timer.
YES (ENABLED): The transfer switch will remain on the generator supply until
system operators manually initiate the re-transfer sequence by utilizing the
Manual Re-Transfer button on the GHC display home screen. NOTE: The
transfer switch will automatically re-transfer back to the utility supply if the
generator supply fails.
5.10.10. FORCE TRANSFER
The TSC 900 transfer switch controller contains a “FORCE TRANSFER” feature which
can be enabled to allow the ATS to automatically force a transfer to the alternate
source should an abnormal operating condition be detected with the ATS. The TSC
900 controller will detect abnormal conditions such as loss of ATS load voltage due to
a tripped power switching device or the transfer mechanism limit switch is not in the
correct state. The Force Transfer feature is user programmable and allows 2 different
functional settings as described below:
NO (DISABLED): Force transfer to alternate source is disabled in this mode. If
an abnormal operating condition is detected by the TSC 900 controller, a
Transfer Switch Fail Alarm will be posted on the GHC display. The TSC 900
controller will keep the ATS mechanism in the current position and will take no
further action. The alarm condition may be reset utilizing the Reset button on
the GHC Alarm page.
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