TSC 800 TRANSFER SWITCH CONTROLLER
PM 049 REV 10 08/09/25 Thomson Technology
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2. The neutral delay may be bypassed should the operating
power fail for longer than the timer setting.
7.5.12. NEUTRAL DELAY BYPASS
The TSC 800 transfer switch controller contains a “NEUTRAL DELAY BYPASS” logic,
which allows a shorter neutral delay period during transfer if the load bus voltage falls
to safe levels before the transfer sequence is completed. This feature is user
programmable and allows 2 different functional settings which are described below:
DISABLED: The transfer switch neutral delay period will operate as per the
Neutral Delay Timer setting.
ENABLED: The transfer switch neutral delay period will be bypassed if the
load bus voltage falls to safe levels before the transfer sequence is completed.
7.5.13. MAXIMUM TRANSFER TIME
The TSC 800 transfer control logic includes an adjustable time delay feature to detect
when a transfer switch mechanism fails to operate. This time delay is set to a time
value which is greater than the typical time that the transfer mechanism typically takes
to operate from one supply position to the opposite supply position. This feature is
factory set to match the specific transfer switch mechanism as supplied with the unit.
7.5.14. TRANSFER FAIL
The TSC 800 transfer switch controller contains a “TRANSFER SWITCH FAIL”
detection feature. This feature is user programmable and allows 3 different functional
settings which are described below:
DISABLED: The “TRANSFER SWITCH FAIL” feature is disabled in this mode.
The TSC 800 controller will not verify that the transfer mechanism has operated
correctly.
HALT TRANSFER: The TSC 800 controller will verify that the transfer switch
mechanism has correctly transferred or is in the correct position. If the TSC
800 controller senses an abnormal condition (i.e. load voltage and transfer
switch position contacts are not at the normal levels or states) the controller will
activate an alarm message to the LCD display. Note: “The transferring output
signals from the controller will be de-activated and the engine start contact will
remain in its last state (before the alarm was activated)”. The controller has an
internal 30-second timer to provide an alarm bypass to enable correct operating
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