5.12.19. RETURN TO PREFERRED SOURCE DELAY
Note: this time delay setting is only applicable for ATS ordered with the Dual Source
Option.
When the “Preferred” power source returns to normal following a power failure condition,
the ATS will automatically re-transfer back to the “Preferred” source following expiry of
the RETURN TO PREFERRED SOURCE DELAY timer. This timer is provided to
ensure the source is stable for a desired period of time prior to resuming load supply.
Select desired source return delay time in seconds. If no delay is required, set this time
delay to zero. NOTE: This time delay will be bypassed should the “Standby” source fail
during the time delay period.
5.12.20. WAIT FOR PREFERRED SOURCE DELAY
Note: this time delay setting is only applicable for ATS ordered with the Dual Gen
Standby (DSG) Option.
When the ATS is ordered with a Dual Gen Standby option, a control feature is provided
to allow the “Preferred” selected Generator to transfer on load before the “Standby”
source is allowed to transfer for a pre-determined time delay. The “Standby” generator
will automatically transfer on load should the “Preferred” generator fail to transfer on load
once the WAIT FOR PREFERRED SOURCE DELAY timer expires. Select desired time
in seconds. If no delay is required, set this time delay to zero.
5.12.21. TRANSFER FROM PREFERRED SOURCE DELAY
Note: this time delay setting is only applicable for ATS ordered with the Dual Source
Option.
If the “Preferred” source power fails, and its transient delay timers expire (e.g. 1 second
UV, UF timers etc.), the "TRANSFER FROM PREFERRED SOURCE DELAY” timer
will start timing. Once it expires, the “Standby” source will transfer on load once its Warm-
up delay has expired. Note: If the “Standby” source was previously energized at normal
voltage and frequency levels for longer than its Warm-up Timer setting, it will wait for the
"TRANSFER FROM PREFERRED SOURCE DELAY” timer to time out before it
transfers on load following a “Preferred” source power failure. Select desired time in
seconds. If no delay is required, set this time delay to zero.
5.13. UTILITY/GEN SET POINTS (VOLTAGE/FREQUENCY)
The TSC 900 controller provides 3-phase over voltage and under voltage sensing on both utility
and generator supplies. Each sensor is individually programmable for pickup and dropout
voltage set points (i.e. adjustable hysteresis) in addition to transient time delay settings. The
TSC 900 controller also provides under and over frequency sensing on both utility and generator
To Next Page
Loading...
Need help?
General
