TSC 800 TRANSFER SWITCH CONTROLLER
PM 049 REV 9 06/04/24 Thomson Technology
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7.4.6. UTILITY OVER VOLTAGE SENSOR TIME DELAY (PICKUP)
Select the desired utility over voltage time delay setting. The setting is entered in
seconds within a range of 0 to 5 seconds. If no delay is required, set this time delay to
zero.
7.4.7. UTILITY UNDER FREQUENCY SENSOR
Set to the desired utility under frequency setpoint at which the internal frequency
sensor drops out (i.e. the sensor de-energizes to an abnormal state when the utility
frequency is below the setpoint). The setting is entered in a frequency value within a
range of 25.0 to 49.9Hz (for 50 Hz Systems) and 30.0 to 59.9Hz (for 60Hz Systems).
7.4.8. UTILITY UNDER FREQUENCY SENSOR TIME DELAY (DROPOUT)
Select the desired utility under frequency time delay setting. The setting is entered in
seconds within a range of 0 to 10 seconds. If no delay is required, set this feature to
zero.
7.4.9. UTILITY OVER FREQUENCY SENSOR
Set to the desired utility over frequency setpoint at which the internal frequency sensor
picks up (i.e. the sensor energizes to an abnormal state when the utility frequency is
above the setpoint). The setting is entered in a frequency value within a range of 50.1
to 100.0Hz (for 50 Hz Systems) and 60.1 to 120.0Hz (for 60Hz Systems).
7.4.10. UTILITY OVER FREQUENCY SENSOR TIME DELAY (PICKUP)
Select the desired utility over frequency time delay setting. The setting is entered in
seconds within a range of 0 to 5 seconds. If no delay is required, set this time delay to
zero.
7.4.11. GENERATOR UNDER VOLTAGE SENSOR PICKUP
Set to the desired generator under voltage setpoint at which the internal voltage
sensor picks up (i.e. the sensor energizes to a normal state when all phases of the
generator voltage are above 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.
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
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