Issue 1 8
7.2.2 MAINS
Mains alarms signal that the mains supply is out of limits. In AUTO mode, the generator is called to
start (if not already running) and will be placed on load when available.
If the mains supply fails while the generator is running in MANUAL mode, the 333 ATS module
transfers load to the generator supply.
Should an input configured to Simulate Mains Available be active, the mains failure detection is
inhibited.
Mains failure
Combined message to indicate the failure of the mains supply or activation of an input configured to
Auxiliary MainsFailure.
Mains Under Frequency trip
The mains supply is below the configured Under Frequency trip level.
Mains Under Voltage trip
The mains supply is below the configured Under Voltage trip level.
Mains Over Frequency trip
The mains supply is above the configured Over Frequency trip level.
Mains Over Voltage trip
The mains supply is above the configured Over Voltage trip level.
7.3 PLANT BATTERY
Plant battery alarms are Warning alarms only. The module displays the fault but no further action is
taken.
Under Voltage warning
The battery supply is below the configured Under Voltage warning level.
Under Voltage warning
The battery supply is above the configured Over Voltage warning level.
8 SYSTEM TEST
It is recommended that the generator is tested every week and run on load for 30 minutes.
9 FRONT PANEL CONFIGURATION
This configuration mode allows the operator limited customising of the way the module operates.
Use the module’s navigation buttons to traverse the menu and make value changes to the
parameters:
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