TSC 800 TRANSFER SWITCH CONTROLLER
PM 049 REV 9 06/04/24 Thomson Technology
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7.4.17. GENERATOR UNDER FREQUENCY SENSOR
Set to the desired generator under frequency setpoint at which the internal frequency
sensor drops out (i.e. the sensor de-energizes to an abnormal state when the
generator 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).
7.4.18. GENERATOR UNDER FREQUENCY SENSOR TIME DELAY
(DROPOUT)
Select the desired generator 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
time delay to zero.
7.4.19. GENERATOR OVER FREQUENCY SENSOR
Set to the desired generator over frequency setpoint at which the internal frequency
sensor picks up (i.e. the sensor energizes to an abnormal state when the generator
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).
7.4.20. GENERATOR OVER FREQUENCY SENSOR TIME DELAY (PICKUP)
Select the desired generator 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.
7.5. GENERATOR CONTROL LOGIC
The TSC 800 provides control and delay logic specific to the operation of the generator, these
are:
7.5.1. COMMIT TO TRANSFER LOGIC
The TSC 800 transfer switch controller contains a “COMMIT TO TRANSFER” logic
selection feature. This feature is user programmable and allows 2 different functional
settings which are described below:
DISABLED: The transfer switch will not commit to transfer after the engine
start delay has expired.“
ENABLED: The transfer switch will commit to transfer after the engine start
delay has expired.“ Selecting the “ENABLED” mode will prevent numerous
engine starting and stopping sequences if the utility supply is continuously
fluctuating beyond the pre-set limits. The feature is automatically cancelled
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