Our Variable transformers (or Regavolt® as we call them) can deliver a user adjustable output voltage, usually between 0-100% or 0-113% of the input voltage depending on model. These transformers are used in a wide variety of different applications, but are the most commonly found in industrial settings. Often controlled with an optional knob dial, Regavolts are generally used in applications where you need to adjust (ramp up or down) the AC input voltage for a piece of test equipment to a voltage other than that delivered by the energy provider.

Although they operate on similar principles, Regavolts do vary from standard transformers due to the autotransformer design meaning that they only have a single coil which means that there is no physical separation between the voltage source and the load. But how do Regavolts work? As you turn the dial knob, a carbon roller brush moves across an exposed part of the windings, as the brush moves from the neutral connection end to the live connection end the voltage increases. There are often several additional windings past the Live 230v termination which allow you to achieve an output voltage greater than the original input voltage, giving an output of up to 113% of the input voltage.

There are a huge range of uses for, you can use them in any application where the amount of voltage needs to be varied on the fly. Other uses include speeding up or slowing down AC electric motors, making lights brighter or dimmer and also for testing purposes, to achieve output voltages up to 260V from a standard 230V AC supply.

Please click here to see our Variable Transformer range, or contact our Product Specialist on 01992 455930.

Regavolt® is a registered Trade Mark of The Allendale Group Limited.