Staco Energy 2kW Variable Autotransformer

The Staco Energy 2kW Variable Autotransformer is a variable transformer designed to provide adjustable output voltage from 0 to 117% of the unit's input voltage. It is used wherever you need controlled, repeatable voltage adjustment for setup, testing, troubleshooting, or operating equipment at a specific voltage.

Variable Voltage Control, Turn-by-Turn

It consists of a copper winding on a toroidal core of laminated, grain-oriented, silicon steel. A carbon brush, connected to an output terminal, is rotated over the length of a precision-ground, precious metal-plated, commutator track to tap off voltage at any turn from zero volts to the maximum output voltage of the winding. This design supports smooth, continuous voltage selection, helping you dial in the output level instead of being limited to fixed transformer taps.

Cased Plug-In Design for Bench and Field Use

The cased plug-in model variable transformer features a ventilated steel case, input line cord and plug, fused NEMA rated output receptacle, and an illuminated on/off switch. It is connected for output voltage increase with a clockwise rotation, and the dials are graduated from 0-100% of the voltage setting, making it easier to return to a known setting during repeat tests or adjustments.