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Black Gold Single Phase Uninterruptible Power Supply Systems
Guide Specifications
2.0kVA Industrial Rackmount
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waveform modulated by the PWM control using the 16 KHz switching frequency
sinewave. The PWM-Modulated voltage waveform is transformed into a sine voltage
waveform by the inductive component of the inverter transformer and by the capacitive
component of the capacitor filter. The chopper, inverter, and charger use the IGBT with
a self-extinguishing function and a high switching speed.
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 charging the batteries.
4.2.3 Battery Charge
The charger will float charge the batteries while no load is being powered by normal
mode.
4.2.4 Static Bypass
The load is being powered by an alternate source by being transferred from normal mode
to bypass mode by the bypass switch. This mode is used during overload and
maintenance repair. Power is conditioned by M.O.V.'s and a line filter during bypass
operation.
5.0 UPS Input
5.1 System Rating The UPS's are sized to supply a load with a power factor of 0.70.
5.2 Electrical Requirements
Voltage: 120 VAC Single Phase +10%/-30%
Frequency: 50 or 60 Hz +/- 5 Hz
Input Harmonic Distortion: less than 10% THD (current)
Input capacity: 1.0 times output capacity
Input power: approximately 1.0 power factor (unity)
5.2.2 Battery Bus
Volts: 2.0 KVA 72 VDC nominal
Backup time: 6 mins @ full load/18 mins @ half load