Q&A

Installing a powerPerfector to optimise the power supply to common motors (HVAC etc) can deliver better energy savings than a Variable Speed Drive installation: as well as optimising the voltage it will act to balance the three phase voltage (which dramatically improves efficiency), reduce reactive power and improve power factor. Savings from voltage optimisation on AC motors depend on the extent to which over-voltage and phase imbalance are currently a problem, but we would expect savings in the region of 11% for an average supply voltage. We have carried out installations at several sites, however, where correcting phase imbalance has resulted in much higher savings than that.

For specialist applications, a VSD may well deliver higher savings on an individual motor, but the aggregated benefits of having a powerPerfector optimise the entire site's load at source are considerable. Some sites already have VSDs installed on various motors: the powerPerfector will give further energy savings on these as well as improving the reliability of the VSD itself.  However, the level of savings achieved is likely to be lower than average, as we cannot 'double account' for the savings already delivered by the VSD.

Our Energy Consultants will give you a realistic estimate of the energy savings that can be achieved on your site in advance of a powerPerfector installation, factoring in the number of VSDs already installed.