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1800 Series Single Phase Uninterruptible Power Systems
Product Specifications – Rev 3.0 August 2008
2.4 kVA
Page 2 of 6
IGBT with a self-extinguishing function and a high switching speed. Optional input and
output transformers for extra power conditioning.
4.2 Modes of Operation
4.2.1 Emergency (Battery Backup)
In the event the AC power from the utility system fails, the DC power is supplied from
the batteries to the chopper and to the inverter to provide a continued and stable AC
power supply to the load without interruption.
4.2.2 Normal (Inverter)
The rectifier converts AC to DC to power the inverter, which supplies power to the
critical load and simultaneously float charges the batteries.
4.2.3 Battery Charge
The charger will float charge the batteries in normal and bypass modes.
4.2.4 Static Bypass
If the UPS unit is in severely overloaded or develops an internal fault, power is
automatically switched from the units’ main circuit to the bypass circuit. Power is
conditioned by line filters, and the isolation transformer during static bypass operation.
5.0 UPS Input
5.1 System Rating The UPS is sized to supply a load with a power factor of 0.70.
5.2 Electrical Requirements
Voltage: 208/240 VAC Single Phase
Voltage Range : 240V: 144V~264V (+10% to -40%)
: 208V: 125V~228V (+10% to -40%)
Frequency: 50 or 60 Hz ±3Hz
Power Factor: Greater than 0.95
Input Total Harmonic Distortion: Less than 5% (current)