Superior Electric TYPE 10B Powerstat Variable Transformer

The Superior Electric Type 10B POWERSTAT Variable Transformer is a toroidal autotransformer that delivers smooth, continuously adjustable AC voltage from a 120V input, with an output range of 0–120V AC nominal (up to 132V AC depending on configuration). It operates at 50/60 Hz and is rated for approximately 1.75–2.25 A and about 210–230 VA, enabling precise voltage regulation for testing, calibration, motor speed control, and heater regulation in laboratory, industrial, and electronic applications, with a track record of low waveform distortion and high efficiency. The unit uses a manual rotary brush-tap adjustment and an open-frame toroidal design, suitable for bench-top or panel-mounted installation in test benches, calibration systems, repair stations, and automation setups that require dependable, adjustable AC power delivery.