Voltage Regulators, Autotransformers
and Isolation TransformersOver 30 Years of Manufacturing Expertise
Servo and static regulators, autotransformers, isolation transformers and UPS solutions that protect your machines and electronics from voltage fluctuation, each sized to your project’s power and voltage.
Servo and static regulators, autotransformers, isolation transformers and UPS solutions.
- 2-year insurance cover
- Over 30 years of manufacturing expertise
- Custom kVA and voltage manufacturing
- Domestic and international projects
Our products are insured for 2 years
In case of burn-out or failure, a payout can be claimed under the insurance cover. Scope and conditions follow the policy terms.
Product Groups
Our core product groups, each sized specifically to your needs.
Servo Voltage Regulator
Servo-motor-controlled voltage regulator that stabilizes voltage smoothly and with high precision.
Static Voltage Regulator
Electronically switched regulator with no moving parts, correcting voltage within milliseconds.
Autotransformer
Single-winding transformer that raises or lowers voltage economically and efficiently.
Isolation Transformer
Transformer with electrically separate windings, providing safety and noise filtering.
Uninterruptible Power Supply (UPS)
Uninterruptible power supply that keeps the load running on battery power during a power outage.
Find the right product in 2 questions
We suggest the product group that fits your answers.
1What would you like to do?
2How does the voltage fluctuate?
2Is electrical isolation also needed?
Servo Voltage Regulator
Servo-motor-controlled voltage regulator that stabilizes voltage smoothly and with high precision.
This is a first suggestion; confirm the final choice with our technical team using your load data.
Static Voltage Regulator
Electronically switched regulator with no moving parts, correcting voltage within milliseconds.
This is a first suggestion; confirm the final choice with our technical team using your load data.
Autotransformer
Single-winding transformer that raises or lowers voltage economically and efficiently.
This is a first suggestion; confirm the final choice with our technical team using your load data.
Isolation Transformer
Transformer with electrically separate windings, providing safety and noise filtering.
This is a first suggestion; confirm the final choice with our technical team using your load data.
Uninterruptible Power Supply (UPS)
Uninterruptible power supply that keeps the load running on battery power during a power outage.
This is a first suggestion; confirm the final choice with our technical team using your load data.
The advantage of a manufacturer: design around your load
30+ years of manufacturing expertise
We carry forward our founding partner’s more than thirty years of manufacturing know-how under our new brand.
Custom sizing
We do not settle for off-the-shelf values; kVA, voltage and phase configuration follow your load.
Engineering support
From selection to commissioning we work with you through our technical team.
Domestic and international
We serve local and overseas projects with multilingual technical communication.
Sectors served
Voltage Lab
Move the grid voltage yourself and compare how servo and static regulators respond, live.
Within correction window
Servo: stepless and precise, but limited by servo motor speed.
Educational simulation. Example values: nominal 220 V, correction window 170–250 V, servo accuracy ±1%, static step 10 V. Actual values are defined per project and model.
Voltage problems are a silent and costly expense
Every deviation in mains voltage leaves invisible wear on your equipment. The problem is often noticed only when something fails.
Unexpected failures
Under low voltage motors draw excess current and overheat; under high voltage drives and electronic boards are damaged.
Downtime and quality loss
In CNC and precision machines, voltage deviation causes dimensional errors, sudden stops and more scrap.
Shortened equipment life
Constant fluctuation reduces the life and efficiency of the equipment you invested in.
Autotransformer or isolation transformer?
Follow the path of the electricity and see the key difference between the two at a glance.
One shared winding: electricity passes directly from input to output. Economical and efficient; no galvanic isolation.
Calculate regulator kVA instantly
Enter your load power and get the required kVA in seconds, with power factor and headroom applied.
Four steps from needs analysis to delivery
Needs analysis
We review your load, voltage, phase and environment data together.
Sizing and quotation
We define kVA and technical specifications and prepare a clear quote.
Manufacturing and inspection
We build and inspect the unit to specification.
Delivery and support
We provide technical support through shipment and commissioning.
Technical guides
Technical guides for choosing regulators and transformers.
2-Year Insurance Cover: Burn-Out and Failure Protection for ONS Enerji Products
What does the 2-year insurance cover on ONS Enerji products mean? A payout can be claimed for burn-out and failure, with scope set by the policy terms.
Autotransformer vs Isolation Transformer: What Is the Difference?
Autotransformer vs isolation transformer: winding structure, galvanic isolation, safety, efficiency and cost. When to use which? Comparison table and guidance.
How to Calculate Voltage Regulator kVA: Step-by-Step Sizing Guide
How to calculate voltage regulator and transformer kVA. Watt-to-VA conversion, power factor, motor starting current and headroom, with worked examples.
Servo vs Static Voltage Regulator: Differences and Selection Guide
Differences between servo and static voltage regulators: speed, accuracy, maintenance and cost. Which one suits which load? Comparison table and selection guide.
Frequently Asked Questions
The most common questions about selecting regulators and transformers, custom manufacturing and the quotation process.
01What is a voltage regulator and what does it do?
A voltage regulator is an automatic protection device that keeps the voltage supplied to equipment close to its nominal value when mains voltage rises or drops. It protects machines, electronic boards and drives from failures and lifetime loss caused by voltage fluctuation.
02What is the difference between a servo and a static regulator?
A servo regulator corrects voltage steplessly and precisely with a servo-driven variac, but more slowly. A static regulator corrects in steps using electronic switches, very fast and with no moving parts. The choice depends on the load’s accuracy and speed needs.
03Are your products covered by insurance?
Yes. ONS Enerji products are covered by insurance for 2 years; in case of burn-out or failure, a payout can be claimed under the insurance cover. Scope, exclusions and the claim process follow the policy terms; please contact us for details.
04What is the difference between an autotransformer and an isolation transformer?
An autotransformer shares one winding between input and output; it is economical and efficient but gives no galvanic isolation. An isolation transformer has two electrically separate windings, providing safety and noise filtering.
05Do you manufacture custom kVA or voltage ratings?
Yes. We size and manufacture regulators and transformers to your load, input/output voltage and phase configuration. Simply share your details through the quote form.
06What information is needed for a quote?
Application, total load power (kW/kVA), input and output voltage, number of phases, quantity and desired lead time. You can submit the form even with incomplete data; our engineers will get back to you.
Let’s define the right solution for your project
Share your load data and operating conditions; we will confirm kVA, voltage and protection needs together with our engineers.