Frequently Asked Questions about powerPerfector
We expect to see the greatest savings on sites with large lighting and office equipment loads, including motors, refrigeration and air conditioning. Longer operating hours (high ‘load factor’) will maximise the savings made.
We would expect sites with conventional equipment to see energy savings of between 5-10%. Please see our case study section for more information.
Are there any funding routes available for a powerPerfector installation?
Full details can be found there.
What savings would I expect to see following a powerPerfector Installation?
For lighting systems with an electronic ballast there is less direct effect on energy use, but these systems are responsible for generating higher levels of harmonic distortion than a reactive ballast. As the powerPerfector helps to filter harmonic distortion, the efficiency of a site with electronic fluorescent lighting can be improved.
Similarly, there is a substantial opportunity to make savings where motor equipment is “direct online” and running at part load. However, when a variable speed drive is in use, the motor’s power supply is managed by the drive, so there is a reduced direct effect from the powerPerfector. Savings are made by filtering the harmful harmonic content these drives sometimes generate.
A full load assessment will be undertaken by a powerPerfector engineer prior to installation, to appraise the likely savings, based on the specific mixture of electrical loads at your site
Why don’t I just tap down my transformers?
The savings and benefits of a powerPerfector installation will quickly outweigh a transformer tap.
How do you log the site voltage as part of your appraisal?
In our experience, this method captures the worst case voltage, allowing us to set the powerPerfector unit appropriately. The phase balancing is checked later as part of the site survey process, so if a severe imbalance is detected the site can be re-logged to capture other phases.
Three phase logging can be used to support this process, for example on sites with a high proportion of three phase equipment. Please contact a member of the sales team for details and costs.
How does powerPerfector differ from power factor correction?
powerPerfector does not contain any capacitive components, but by reducing the running currents to equipment the reactive impedance of that equipment is also reduced, lowering levels of reactive power on the site overall and lifting the power factor by between 3-10%.
What are the differences between powerPerfector and autotransformers?
A powerPerfector meanwhile, has no moving parts or electronic controllers, giving it a maintenance-free lifespan of 50+ years. Its functions (optimisation of voltage, transient protection, harmonic suppression and phase balancing) occur through the interaction of magnetic fields in its unique winding configuration. Further, advanced manufacturing techniques allow it to operate with a peak efficiency of 99.94%. This again sets it apart from an autotransformer, where efficiency may change substantially according to the load passing through the device.
The powerPerfector is designed to be an energy-saving device, optimised to address the problems of over-voltage and the electrical conditions of today’s grid. Autotransformers were developed for different applications and have been adapted to allow their suppliers to capitalise on the growing market for energy saving equipment. Only the powerPerfector has been designed from scratch to sit at the source of your building’s power supply without introducing a risk of overheating or failure.
What is the lead time for units?
powerPerfector Plus units may take slightly longer from the point of order, however please contact us for more details as lead times can be reduced for multiple unit orders.
What is the guarantee offered on the units?
The expected lifetime is 50 years.
Which items of infrastructure need checking either before or after installation?
There is also an equipment checklist that should be checked prior to and after installation. Talk to one of our sales team to understand more about the process.
Is powerPerfector compatible with Photo Voltaic (PV)?
This is something we will identify during the site survey and advise on prior to installation.
What happens if we move premises or extend our site?
If you are planning to expand and anticipate that your electrical demand will increase we will allow more headroom by installing a larger unit.
What will happen to the old motors on site that are rated 415V?
The nameplate rating of motors is part of this assessment, but in general their loading point is a much more important consideration than the nameplate voltage – lightly loaded motors can be made to run more efficiently by bringing the voltage to a more appropriate level for their loading point.
Is a by-pass required when installing a powerPerfector unit?
- You wish to prove the savings attributable to the powerPerfector by switching it in and out of circuit and observing the effect on energy consumption.
- You perceive the powerPerfector unit as a potential failure point therefore by-pass is favourable to provide capacity at short notice.
- Historic performance is the best indicator of risk. We have supplied and installed over 5,500 units in the UK and tens of thousands worldwide over the last 20+ years. There has never been a single unit failure.
- The powerPerfector is connected in series and has no moving parts. The powerPerfector Plus is also wired in series except for a control module based on solid state thyristor technology that controls voltage output, which is connected in parallel. This unit also contains no moving parts, and in the unlikely event of a failure in the electronics, the supply to the building will be maintained but without the voltage control on the existing supply. As a result, our clients can be absolutely confident in the reliability of the powerPerfector as a permanent part of the electrical infrastructure.
It is important to consider that specifying a by-pass does not mean that a standard voltage optimisation unit can be removed from circuit seamlessly. For a fixed ratio unit the power needs to be isolated before the by-pass can be engaged, meaning that there is a short power outage associated with using the by-pass.
We have CHP at site – where does the powerPerfector need to be installed?