TSC 800 TRANSFER SWITCH CONTROLLER
PM 049 REV 9 06/04/24 Thomson Technology
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ground reference is provided by the these transformers and no further
actions are required). Where this ground reference path does not exist
a true zero voltage reference may not be achievable (upstream breaker
ahead of the TSC 800 open in respect to the building utility supply
transformer) as this leaves the sensing inputs to the TSC 800 floating.
In cases such as this the TSC 800 sensing inputs for the Utility supply
must temporarily be grounded to provide this true zero reference. It is
imperative, should this work be undertaken, it only is preformed by
qualified personnel and that the shorting leads be removed before re-
energizing the circuit. Failure to do so will result in catastrophic
equipment failure and possible personnel injury and/or death.
7.6.2.1.3. Use the INCREMENT or DECREMENT pushbuttons to
adjust the correction factor number while observing the displayed
voltage level. Adjust the correction factor number to obtain 0VAC on
the display.
7.6.2.1.4. With the correct voltage displayed, press the ENTER
pushbutton to accept the correction factor number. Record the
correction factor number on the TSC 800 programming sheet for future
reference if required.
7.6.2.1.5. Repeat the above procedure for Zero Calibration for all
remaining phases of the utility supply as required. Remove any
shorting leads for zeroing purposes before proceeding.
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