TSC 800 TRANSFER SWITCH CONTROLLER
PM 049 REV 10 08/09/25 Thomson Technology
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NOTE: The difference between the pickup and dropout setting is considered the dead
band or hysteresis value.
Note: The generator Under Voltage time delay function is enabled if generator voltage
drops below the setpoint on one or more phases and the voltage remains between the
setpoint and 50% of nominal voltage. Should the generator voltage drop below 50% of
nominal value on all phases, the programmed time delay will automatically be reduced
to zero seconds. This feature reduces total transfer time back to the utility supply
should the generator set shutdown or loose total voltage output for any reason.
7.4.12. GENERATOR UNDER VOLTAGE SENSOR DROPOUT
Set to the desired generator under voltage setpoint at which the internal voltage
sensor drops out (i.e. the sensor de-energizes to an abnormal state when any one
phase of the generator voltage is below the setpoint). The setting is entered based on
a phase-to-phase voltage value within a range of 70% to 99% of nominal system
voltage. NOTE: The difference between the pickup and dropout setting is considered
the dead band or hysteresis value.
7.4.13. GENERATOR UNDER VOLTAGE SENSOR TIME DELAY
(DROPOUT)
Select the desired generator under voltage time delay setting. The setting is entered in
seconds within a range of 0 to 10 seconds. If no delay is required, set this time delay
to zero.
7.4.14. GENERATOR OVER VOLTAGE SENSOR PICKUP
Set to the desired generator over voltage setpoint at which the internal voltage sensor
picks up (i.e. the sensor energizes to an abnormal state when any one phase of the
generator voltage is above the setpoint). The setting is entered based on a phase-to-
phase voltage value within a range of 101% to 200% of nominal system voltage.
NOTE: The difference between the pick up and drop out setting is considered the dead
band or hysteresis value.
7.4.15. GENERATOR OVER VOLTAGE SENSOR DROPOUT
Set to the desired generator over voltage setpoint at which the internal voltage sensor
drops out (i.e. the sensor de-energizes to a normal state when all phases of the
generator voltage are below the setpoint). The setting is entered based on a phase-to-
phase voltage value within a range of 101% to 200% of nominal system voltage.
NOTE: The difference between the pickup and dropout setting is considered the dead
band or hysteresis value.
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