AC Voltage Stabilisers / Regulators

1 to 5000 kVA
Single & Three Phase

Voltage Stabilisers

In many developed and developing economies, power demand is outstripping supply, giving rise to large voltage swings, surges, and brownouts in the utility mains supply.

All mains powered equipment requires a supply which is maintained within specified limits. Too low and the equipment will malfunction, too high and the equipment could be severely damaged.

At Ashley-Edison (UK) our AC Voltage Stabilizers continuously monitor the incoming mains supply. If the voltage rises or drops, they will automatically control the output voltage – ensuring the voltage reaching the load equipment always remains constant at the required requisite voltage. Inbuilt protection features also continuously safeguard that the load against harmful mains born high energy surges, spikes, and transients.

To learn more about the comprehensive ranges of Voltage Stabilizers available from
Ashley-Edison (UK) please check-out the series listings and FAQ’s below: 

Servo Electronic - Digitally Enhanced - Design

Our latest generation of digitally enhanced, and feature-rich, Servo Electronic Stabilisers (SES) are widely regarded as being the “Finest in Class.”

Suitable for 95% of all applications, they not only guard against voltage fluctuations they also offer protection against all too frequent harmful high-energy surges, transients, and voltage spikes.

Now digitally remastered for the specific needs of today’s ‘Digital Age,’ they include as standard many advanced protection features – usually only available from others as additional expensive add-on options.

1 to 120 kVA

Servo Electronic Voltage Stabilisers available

Single-Phase
2 Wire

Cost-Efficient Voltage Stabilisation and basic Power Conditioning for the smaller General Commercial & Industrial Applications

Also available in 19″ Rack-Mountable and IP54/NEMA 3 Style Enclosures

Single-Phase
2 Wire

Ideal for most General Commercial & Industrial Applications

Also available in IP54 / NEMA 3 Style Enclosures (-IP54 Option) and as Power Line Conditioners (-PC Option)

Split Single/Two-Phase
2 Wire to 3 Wire

Specifically configured for electrical distribution systems commonly found in North American residential and light commercial buildings

Also available in IP54 / NEMA 3 Style Enclosures (-IP54 Option) and as Power Line Conditioners (-PC Option)

Three-Phase
4  or 3 Wire

Our Traditional Servo Electronic Stabiliser (SES) design digitally remastered for today’s demanding power environments

Also available in IP54 / NEMA 3 Style Enclosures (-IP54 Option) and as Power Line Conditioners (-PC Option)

Static Electronic Digital Design

Our ranges of Static Electronic Voltage Stabilisers are micro-processor based digital electronic regulators and represent the latest in voltage stabilizer design evolution.

Based on the exceptionally well proven Buck-Boost design topology, which underlines our SVR Servo Voltage Stabilisers, ESR Static Voltage Regulators utilise SCRs (Silicon Controlled Rectifiers), as opposed to Variable Transformers, to control the voltage.

Compatible with all load types and offering independent phase control, they deliver ultra-fast response times in correcting over/under voltages, sags, and surges – making them ideal for highly sensitive and mission-critical loads and their applications.

0.5 to 3125 kVA

Static Electronic Voltage Stabilisers available

Single Phase
2 Wire

Low Cost, virtually maintenance-free, Voltage Stabilisation and Power Conditioning for the Home and Small Business Office

Alternative permissible input voltage window models available to accommodate even the worst of Power Environments

Single Phase
2 Wire

3 to 150 kVA

Ideal for most General Commercial & Industrial Applications where a virtually maintenance-free solution is required

Also available in IP54 / NEMA 3 Style Enclosures (-IP54 Option) and as Power Line Conditioners (-PC Option)

Three Phase
3 or 4 Wire

6 to 400 kVA

Highly efficient microprocessor control. Ideal for today’s modern General Commercial & Industrial Applications

Also available in IP54 / NEMA 3 Style Enclosures (-IP54 Option) and as Power Line Conditioners (-PC Option)

Three Phase
3 or 4 Wire

450 to 3125 kVA

Specifically configured for the needs of larger sites.

Also available in IP54 / NEMA 3 Style Enclosures (-IP54 Option) and as Power Line Conditioners (-PC Option)

Brushless Magnetic Induction Design

Designed for maximum reliability, making them ideal for the toughest of applications, Ashley-Edison (UK) Three-Phase Oil Immersed and Air Cooled AC Automatic Voltage Stabilizers and Regulators enhance power quality, providing industrial-grade regulation and power protection.

Tried, tested, and extensively proven in some of this world’s harshest industrial and most challenging power environments.

250 to 5000 kVA

Magnetic Induction Voltage Stabilisers available

Magnetic Induction
Oil Immersed
With Independent
Phase Control

250 to 3000 kVA
Three Phase –  3 & 4 Wire

Oil Cooled “Brushless” Industrial design – with Independent Phase Control.

Oil Immersion considerably enhances cooling efficiencies and as a result delivers, in terms of physical size, a highly compact voltage regulation solution.

Also available as an ISO Containerised solution with associated Switchgear (-ISO-MSB Option).

Magnetic Induction
Oil Immersed
Without Independent
Phase Control

250 to 5000 kVA
Three Phase –  3 & 4 Wire

Oil Cooled “Brushless” Industrial design – without Independent Phase Control.

Oil Immersion considerably enhances cooling efficiencies and as a result delivers, in terms of physical size, a highly compact voltage regulation solution.

Also available as an ISO Containerised solution with associated Switchgear (-ISO-MSB Option). 

Magnetic Induction
Air Cooled
With Independent
Phase Control

250 to 2000 kVA
Three Phase –  3 & 4 Wire

Air Cooled “Brushless” Industrial design – with Independent Phase Control.

Also available in IP54 / NEMA 3 Style Enclosures (-IP54 Option) or as an ISO Containerised solution with associated Switchgear (-ISO-MSB Option).

Magnetic Induction
Air Cooled
Without Independent
Phase Control

250 to 2000 kVA
Three Phase –  3 & 4 Wire

Air Cooled “Brushless” Industrial design – without Independent Phase Control.

Also available in IP54 / NEMA 3 Style Enclosures (-IP54 Option) or as an ISO Containerised solution with associated Switchgear (-ISO-MSB Option).

Voltage Satbilisers FAQ's

Here you’ll find answers to some of the more frequently asked questions when looking for a Voltage Stabilizer.

We also have a dedicated FAQ page where we try to answer other questions. Visit the FAQ page.

If you have a question that you can’t find the answer to, please let us know by using the Contact Us page.

The cost of a Voltage Stabiliser can vary depending on a variety of factors, of which the two prime ones are – the power rating of the load you wish to protect and the required permissible input voltage window the Stabilizer is expected to operate in whilst still delivering the required output voltage. As a general rule of thumb, on smaller rated applications, Servo Electronic solutions are the most cost-efficient. However, above 80 kVA Static Electronic Stabilizers tend to be more cost advantageous and offer enhanced power protection features with a smaller footprint. To get pricing, please contact us.

In essence both protect against voltage transients, spikes, sags and brownouts, but a Power Conditioner also offers additional protection against Electrical Noise and higher-level defence against transients and spikes. In most cases, a Power Line Conditioner is simply a Voltage Stabiliser with the inclusion of an isolation transformer. When a good earth cannot be provided Common Mode Noise (E to L and E to N) can be a problem. With the inclusion of a shielded isolating transformer in a Power Conditioner, this interference will be suppressed to harmless levels. The output of an AC Power Conditioner is commonly referred to as a Clean supply. As you would expect, a Power Line Conditioner usually is more expensive than a Voltage Stabilizer / Regulator. So, if electrical noise is not an issue on your site, the most cost-efficient solution is typically a Voltage Stabiliser.

Historically, for general commercial and industrial applications, Servo Electronic based Voltage Stabilisers have dominated the market. However, in recent times with advances in microprocessor control, the Static Electronic Stabiliser has really come into its own. Today, as static solutions with no moving parts other than fans for cooling, these types of Stabilizer are leading their field, especially for power applications above 80 kVA. Where the application is genuinely industrial in nature, and the stabilizer is expected to operate in a far more demanding power environment, Magnetic Induction based industrial stabilizers are the most appropriate. However, they come with a heftier price tag!

In situations where there is a reasonably good mains supply, a Stabiliser offering an input variation swing of ±15% (Our S15 Models) will usually be more than acceptable, but in more remote locations, or countries where the national supply infrastructure is less developed, variations of ±20% or greater may be needed to be accommodated by the Stabiliser. Given that the wider the permissible input voltage window option you select will probably mean the more expensive the stabiliser will be, it is vital to determine before ordering a stabiliser how low, or high, the utility mains supply voltage goes on your site.