Alan Luscombe from Uninterruptible Power Supplies looks at how developments in UPS technology can help optimise energy efficiency without compromising power protection. When UPS systems first became commercially available, they appeared as rotary or 'no break' systems. As the power train relied on the mechanical link between the motor and generator, isolation from mains-borne events such as spikes was excellent, but efficiency was relatively low at typically 84 - 88%. However in those days, energy was relatively cheap and Green strategies were not yet a political or social consideration.
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