Product Type: Transformers

Type 90 Class 2 Transformers

  • Color-Coded Primary Leads
  • Multi-Mount Styles Available
  • Single and Multivolt Models Available


  • Heating & Cooling Applications
  • Industrial Applications
  • Food and Beverage Service Equipment

POWERSTAT® Variable Transformers

The flagship voltage control product offered by Superior Electric, POWERSTAT® Variable Transformers provide a simple, rugged method of controlling electrical voltage, current and power. They take in utility line voltage and provide continuously adjustable output voltage.

Rugged, and designed for heavy duty use, POWERSTAT® Variable Transformers provide excellent power regulation with negligible variation in output voltage from no-load to full-load current. POWERSTAT® Variable Transformers are available in both manual and motor-driven options. They provide high current ratings, long life, superior overload capacity and exceptional resistance to contaminants such as fungus and salt spray.


  • Voltage correction for under-voltage or over-voltage supplies on 1, 2 or 3-phase circuits
  • Producing variable DC voltages from AC sources, usually by control of input voltage to rectifier elements
  • Heater or oven temperature control. Voltage adjustment in addition to usual thermostatic control provides more uniform heating
  • Dimming or controlling incandescent lamp circuits. Life of lamps goes down significantly when operated above rated voltage. Conversely lamp life increases significantly when operated below rated voltage
  • Varying step-transformer output voltage by control of input voltage
  • Operating motors and other electrical equipment at correct voltages even when supply is above or below normal. Starting characteristics at subnormal voltages and heating at higher than normal voltages are critical design factors
  • Speed control of some AC motors and of DC motors operation rectified AC circuits. Fan and other motors with low starting torque are good applications
  • Providing voltages not commonly used for tests or operational runs
  • Calibrating electrical equipment and controls
  • Servo motor regulation

Tripp Lite

Tripp Lite is a manufacturer of solutions to power, connect, secure and protect equipment for IT environments. From the largest data center to the smallest home office, Tripp Lite products keep your equipment running effectively and efficiently. Outstanding reliability, competitive pricing and exceptional service have been Tripp Lite trademarks for over 95 years.

Superior Electric

When you need high-quality, high-reliability voltage or power control and conditioning products, don’t make concessions. Superior Electric is your choice.

Our products and engineered solutions are among the finest in the world.

Superior Electric POWERSTAT® Variable Transformers are used across the world in countless critical applications/installations, while our STABILINE® Voltage Regulators and SUPERCON® Electrical Connecters continue to be the industry standard for users.

Triad Magnetics

Triad Magnetics’ pioneering design process promotes innovation. There are thousands of Triad Magnetics designs providing application solutions throughout the world, from data processing to telecommunications to power conversion. Our engineers are experienced in all packaging styles, even paper encapsulated units. Each engineer has direct ownership and manages projects from initial concept through production.


Power quality problems can disrupt production, damage equipment and corrupt valuable data. SolaHD total power quality solutions keep production lines moving while keeping people, equipment and information safe. Prevent the costly effects of poor power quality with  our comprehensive line of products that convert, protect and back up power throughout production facilities. If it needs power, it needs SolaHD.