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This is one of the latest online UPS designs and most widely used after the simple Double Conversion UPS. It was introduced to reduce the drawbacks of the Double Conversion design and increase the electrical efficiency, which is extremely important on high power systems.
This design is very similar to the Double Conversion design, except from the fact that the Delta Transformer also contributes to the output of the UPS, assisting the ever-working inverter. The major differences do not take place at the output of the UPS but at the input. The Delta conversion UPS provides dynamic control and power factor correction at the input, resulting in a significant reduction of energy loss. It also increases compatibility with other power equipment (e.g. generators) and severely reduces the need of over-sizing wiring and generators.
We are not going to get into too much detail about Delta Conversion UPS units because they are only available in sizes above 4kVA and range up to 2000kVA, meaning that they are designed for powering anything between a small business to a small city and not for home consumers. Furthermore this design is one of the few UPS designs protected by patents, which limits its availability and increases its price far beyond the financial capabilities of typical home consumers.
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This fascinated me, I had no idea there were so many varieties !
I really like these power supplies things KitGuru produce, ive learned so much.
I have always meant to pick up a UPS, just for protection to the computer, rather than for anything hard core.
Honestly, I can’t imagine running any system (house) without UPS. I learned that lesson long time ago the hard way and since then UPS is a must have. Right now running 3: APC SUA2200VA/1980W for primary PC, SUA1500VA/980W for 2nd PC, and another SUA1500 for TV,DVD and all other electronic equipment (including central heating controller/pump). Expensive and heavy piece of equipment but it is worth of every penny/cent/whatever tiny amount of cash :D.
One thing to remember. Never try to save money by buying cheap UPS. Go for APC.
thanks. due to an extraordinarily poor power grid we are dependant upon ups but have found it difficult to choose between them.