THOMSON TSC 80, Руководство по обслуживанию, Страница: 34 / 41

TSC 80 TRANSFER SWITCH CONTROLLER
PM063 Rev 7 09/02/27 Thomson Technology
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frequency setting with an adjustable range of 70-90% (e.g. If system frequency
configuration jumper is set for 60Hz, an 90% under frequency setting will correspond
to an actual 54Hz setpoint.).
NOTE
The actual under
frequency
setpoint voltage is calculated
based on the TSC 80 voltage configuration jumper setting (i.e.
nominal system
frequency
) and the potentiometer setting.
Actual system operating
frequency
should not be used to
calculate the under
frequency
setpoint.
The under frequency setting is for a falling generator frequency (i.e. “drop-out” setting)
on any one phase. The under frequency sensor will reset to normal when the
generator frequency rises 0.5% above the “drop-out setting (i.e. differential value).
Example: if under frequency is adjusted to an 80% drop-out value (i.e. 48.0Hz), it will
reset at 48.3Hz. The 0.5% differential value is not programmable.
NOTE
To override momentary under frequency fluctuations, the under
frequency sensor is provided with a transient time delay period
of 3 seconds which is non-adjustable.
Refer to Table 1 for the factory default settings of the generator under frequency
sensor.
4.2.4. ENGINE START DELAY
A potentiometer is provided to adjust the TSC 80’s Engine Start Delay timer. The
engine start signal will be initiated following expiry of the start delay timer. Select
desired Engine Start time delay in seconds. The range of setting is 0 to 60 seconds.
If no delay is required, set this time delay to zero.
NOTE
The output relay is normally energized when the utility power is
within limits and de-energizes to start the
engine.
Refer to Table 1 for the factory default settings of the Engine Start Delay timer.