Our range of variable autotransformers (often referred to as variacs) are used for the variable control of voltages from 0V to 270V (single-phase) and 0V to 470V (three-phase). Variable autotransformers are frequently used in repair shops for testing appliances under differing voltages or to imitate irregular line voltages.
Select the transformer with the mounting option and phase of your choice then pick your amperage from the dropdown menu inside.
Open-Type Variable Autotransformer for Panel Mounting 1ph (2~28A)from £37.90 Read moreQuick View
Enclosed Variable Autotransformer for Bench Mounting 1ph (2~20A)from £54.90 Add to basketQuick View
Open-Type Variable Autotransformer for Floor Mounting 3ph (2~20A)from £124.00 Add to basketQuick View
Enclosed Variable Autotransformer Free Standing 3ph (2~20A)from £152.00 Add to basketQuick View