Voltage Optimization

This is basic Power Factor Correction. Whilst this particular device may have been design in Japan approx 12 yrs ago, PFC has been around a lot longer.

http://en.wikipedia.org/wiki/Power_factor

Just my two cents worth

Look at their tech site:- http://www.powerperfector.com/technical.php. It is not just a power factor correction device although they do say it improves power factor.

The primary of the transformer is an inductor in series with the site load. The secondaries are not electrically connected to the load. Thus the voltage reduction is taking place across the "primary". What is happening there magnetically is not so clear. Are they saturating the core, a technique used for voltage control in some old battery chargers, or are the secondaries producing a reverse EMF in the primary thus reducing the output to the 220V target voltage?

They seem fairly open about their design, and so I suppose that they have a fairly tight patent, so why not ask for a more detailed explanation of the equipment?

The savings should come from the reduction in voltage to the load equipment which makes the assumption that the loads were designed for optimal results at 220V /50Hz and that the supply is nearer the UK older standard of 240V.

Regards, Chas.

Does anybody else have experience of these "power perfectors" the company i work for is considering investing in these at a considerable cost.We too have many vfd's so where would the savings come from.We are currently pulling about 600amps per phase and have a voltage of 250v.The 11KV transformer has another tapping 2.5% lower which would give me 244v per phase?Wouldnt this save money at no cost?The thing that worrys me is if a 1KW motor on say 100v pulls 2 amps(hypathetical) if i lower the voltage to 50v wont i pull 4amps as P=V*I?Any suggestions appreciated.

My company spoke to a number of suppliers who offer voltage optimsation products. We could not decide the merits of each company who were Powerperfector, EMS, Claude Lyon, Watford Controls, SDC. We were having some transformer and MV switchgear maintenance work completed by an electrical contractor and ended up talking to them about this topic as they are one of the major installers of "VPO" equipment. You could try speaking to them as they seem to know what they are talking about and come from an electrical bias rather than a sales one. The company was called MEC Electrical Contractors in Sheffield and the guy was called David Elliott.

I hope this assists

PS. On there advice we did not install any of the units, instead they adjusted the HV taps on our two site transformers