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Variable Transformers

Our Rotavolt variable autotransformers provide a continuous linear regulation of AC voltage, with high efficiency, without distorting waveforms significantly.

The Watford Control Rotavolt provides a precise and effective way of controlling current, light, heat, motor speed or any other type of output that has a voltage factor.

Our Rotavolt autotransformers are the backbone of our EM Voltage Stabilisers, renowned for their unrivalled accuracy and reliability, with tens of thousands of systems in operation around the world.

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We offer a range of specifications depending on your needs. Here are some key features to help you choose the best option:

  • 9 frame sizes and ratings up to 60kVA
  • Single and three phase models
  • Ideal for high-speed servo applications
  • Multi ganged units available
  • Output voltage continuously variable from 0-115% of input voltage
  • Motorised versions available for remote or automatic operation

Whatever your needs or application, our friendly technical sales staff at Watford Control can help you to get the right product.
Simply fill out our online Fast Track Enquiry Form or call us on +44 (0) 333 210–2–240.

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Services

How can we help you with our services?

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Voltage Stabilisers

Our range of Servo Controlled and Solid State AC voltage stabilisers, offer a solution to meet the most exacting requirements, from 1kVA right up to 4mVA across single or 3 phase applications...

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Power Conditioners

Power Conditioners are used to keep voltage spikes and interference at harmless levels, whilst maintaining a stable voltage supply. There will always be some transient noise in any mains...

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watford-control

Variable Transformers

Our Rotavolt variable autotransformers provide a continuous linear regulation of AC voltage, with high efficiency, without distorting waveforms significantly. The Watford Control Rotavolt...

LEARN MORE
watford-control

Voltage Optimisation

Did you know that you could reduce the cost of your energy by up to 18% through voltage optimisation and management? At Watford Control, we’re working with some of the best known retail brands in...

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Over 10,000+ Products Shipped Worldwide

Unrivalled Voltage Correction Range
of ± 40%

Solid State or Electro
Mechanical Operation

Independent 3 Phase Control

Large Range of Models From 1kVA to
4mVA Single or Three Phase

Fully Customisable to Unique
Customer Requirements

Clients we have served...