TSC 800 TRANSFER SWITCH CONTROLLER
PM 049 REV 10 08/09/25 Thomson Technology
60
feature is set to either “Halt” or “Force” transfer
settings.
NOTE:
The following Programmable output features are provided in
TSC 800 Software version 2.0 (or higher).
UTIL NORMAL Output relay energizes when the utility supply is
energized and is within programmed voltage,
frequency and phase balance limits on all
phases.
GEN NORMAL Output relay energizes when the generator
supply is energized and is within programmed
voltage, frequency and phase balance limits on
all phases.
ATS NOT IN AUTO Output relay energizes when the TSC 800
operating mode is not in the AUTO operating
mode. This condition will occur when the
external switch (e.g. FTS4) or internal Test
Modes is programmed in any other mode other
than Auto.
2
nd
ENGINE START Output relay de-energizes when the TSC 800
signal an engine start operation due to a failed
Utility supply or activated Test mode.
UTIL and GEN NORMAL Output relay energizes when the generator
supply and utility supply are both energized and
are within programmed voltage, frequency and
phase balance limits on all phases.
7.6. VOLTAGE SENSING CALIBRATION
The TSC 800 software program provides voltage-sensing calibration for the utility, generator
and load sensors. All voltage-sensing circuits are factory calibrated to specific voltage levels
prior to shipment of the transfer switch. Recalibration in the field is rare and in most cases
only the Span Calibration needs minor adjustment. Zero calibration should only be
undertaken by qualified personnel due to the nature of the requirements to achieve proper
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