9
power fails or not.
In event that a power failure lasts longer than a UPS backup time, it will shut down avoiding battery
discharge, and as soon as voltage comes back, the UPS will automatically charge up and start
recharging the batteries.
As shown in fig.1 block diagram:
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An input filter reduces transients on the mains
●
For maintaining full battery charge, AC-power is rectified and regulated in the rectifier feeding
power to the inverter and battery converter.
●
DC power is converted to AC in the inverter passing it on to the load.
●
Power is maintained from the battery during a power failure.
●
The converter increases voltage appropriately for the inverter.
Fig.1.
Block diagram
Efficiency Optimizer function
The Efficiency Optimizer function is a new feature for the UPS adding cost effectiveness,
minimizing power loss and reducing power consumption. Alternating between bypass and on-line
modes is achieved automatically and in accordance with the conditions of the utility power. On-line
mode may be used during times of intermittent power supply, and bypass mode when power flows
smoothly in order to obtain greatest efficiency. Irregularities can be detected in less than a second,
and on-line mode reactivated immediately. Switching back to online mode occurs when input
voltage is outside ±10% or nominal (±15% selectable), when input frequency is outside of ±3Hz or
when no input line is available.