Q&A

The two devices have fundamental differences. A “variac” autotransformer is a mechanical device designed to control voltage by adjusting the tap setting of a transformer coil in response to changes in incoming voltage. Heating due to inefficiencies, and abrasion of moving parts means that these devices need regular maintenance and have short lifetimes.

A powerPerfector meanwhile, has no moving parts or electronic controllers, giving it a maintenance-free lifespan of 30-50 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 an unprecedented efficiency of 99.9%, achieved from 15% loading up to full loading. This again sets it apart from an autotransformer, where efficiency will 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.