It is standard practice to provide controlled temperature and humidity in testing and calibration laboratories. But it is equally important to provide a stable supply voltage both to the equipment under test and to the testing instrumentation. 

Specifications for the testing of many types of equipment and apparatus require the application of a specified supply voltage and it is often required that tests are carried out over a range of voltages.  

Feeding a variable test voltage provided by Claude Lyons Regavolt® Variable Transformers, from a stabilised mains supply ensures repeatability and adherence to specifications. Manufacturers and importers of power domestic machines have found this especially beneficial.








UK Established Since 1918

The Claude Lyons Group was founded in the UK in 1918 and is still in private ownership. Since our early days we have been innovators in areas related to voltage and power control and more recently in energy saving and harmonic mitigation. Operating as a global exporter with many years experience we can justifiably call ourselves a world leader in the field of voltage stabilisers, power conditioning and uninterruptible power supplies (UPS)