Australian-Made. Built to Last
All Southern transformers are locally designed and manufactured for long service life, with full compliance to Australian Standards.
Custom-Built for Industrial Demands
From commercial industries to major sectors, we tailor each transformer to meet the real-world needs of your application – no limitations.
Delivered to Your Schedule without Compromise
We understand project timelines matter – Southern delivers transformers to meet your schedule, fast or slow, without cutting corners.
5-year Warranty, 25+ year design life
Every transformer is designed and built to operate continuously at rated power for 25+ years, backed by an industry-leading standard 5-year warranty.
Southern Electronic Services builds a range of 3 phase transformers, ready for hardwiring into your project.
SES holds high levels of materials to ensure we can deliver your project quickly.
- LV Dry-type isolation transformers up to 750kVA
- Typical input/output of 415v/415v, but can design and build up to 3.3kV
- Configuration of Delta/Star (Dyn11) is standard, but can design and build to any requirements
- All of our transformers are wound with enamelled copper for optimal performance and longevity
- Transformers are built using high-grade electrical steel for cores, minimising losses
- Class H (180°C) standard
- Full customisation to best suit application. Electro-static shielding, off-load tapping, additional switchgear all available
- K4 K-Factor standard, but can design to suit needs.
- Typical enclosures are IP33 (indoor) or IP65 (outdoor) rated, other available upon request. Enclosures are heavy-duty powdercoated mild steel.
Understanding Isolation Transformers
Isolation transformers block transmission between the primary and secondary electrical circuits. They play a vital role in protecting the power supply and power supply lines, allowing the voltage to increase from one section to another.
An isolation transformer is critical for many types of equipment and installations.
How Does an Isolation Transformer Work?
An isolation transformer is connected between the power supply (input) and an electrical circuit or device (output) to prevent electrical currents from traveling directly between circuits. This electrical isolation reduces the risk of equipment damage and protects people from electric shock.
Our transformers are designed to separate (isolate) a circuit from the supply. Typically a isolation transformer provide the same voltage at the output as the primary power supply voltage at the input, however, voltage conversion is also possible and common if needed. Their primary function is to achieve circuit separation by isolating the primary and secondary windings, enhancing safety, and reducing electrical noise.
Many transformers also include an electrostatic shield between the windings, which helps to block high-frequency noise from passing through to the output, offering additional protection for specialised equipment.
Why Use Isolation Transformers?
Isolation transformers are typically specified to protect equipment, improve system reliability, and manage electrical noise in demanding environments. They are used where:
- Sensitive electronics require separation from site supply
- Ground potential differences may cause interference
- Fault containment is important
- Compliance or earthing configuration requires electrical isolation
Optional electrostatic shields can further reduce high-frequency noise transfer between windings.
Choosing the Right Commercial Isolation Transformer
When selecting an isolation transformer, ensure it meets the specific voltage, current, and power requirements of your application. The right transformer provides effective isolation and protection, tailored to the operational demands of your system.
Benefits of Isolation Transformers
Create a Safer Environment
They can help prevent electrical shocks and reduce electrical noise, to protect workers and clients from harm.
Protect Your Equipment
Isolation transformers can protect critical devices from damage, increasing their lifespan and effectiveness.
Reduced Noise
Isolation transformers reduce electromagnetic interference between circuits, thereby reducing noise in the system.
Save on Costs
Isolation transformers are often more affordable than other power transformers, helping you save on costs and offering great value.
Built for Demanding Environments
Isolation transformers are often installed in environments where uptime matters — mining sites, industrial plants, data centres, renewable energy grids, BESS and HVAC systems, major infrastructure and more.
By electrically separating supply and load, they help contain faults, reduce interference, and support stable system performance in demanding operating conditions.
When reliability matters, specification matters.
Protect Your Equipment and Electrical Systems with Confidence
Isolation transformers are critical system components where accuracy matters. Voltage ratio, impedance, earthing configuration and environmental conditions must align with the project specification.
At SES, we manufacture to specification while ensuring the design suits real-world operating conditions.
Transformer Solutions Made Simple
Provide your project details and we’ll respond promptly with expert guidance tailored to your needs.
We combine industry expertise with direct technical support, because we don’t take the trust you place in us lightly
Every transformer we build supports critical infrastructure — from mining operations, to data centres and industrial facilities.
We appreciate the pressure around compliance, lead times, and performance, and understand that transformer specifications are somewhat foreign to many.
That’s why we work closely with you from first enquiry through to delivery, ensuring the right design, the right specification, and long-term reliability.
Why Choose Southern Electrical Services?
Years of Experience
We have provided people with custom transformers for over 45 years. This gives us the experience and expertise to ensure your systems get the best support.
High Quality Equipment
We ensure all our equipment is of the highest quality so you get great results every time. Manufactured in Melbourne, you can trust our support will make a difference.
Faster Results
We work quickly and efficiently, with a fast turnaround and international shipping. You can get the transformers you need when you need them.
Testimonials
What Clients Say About Us
Frequently Asked Questions
An isolation transformer is a type of transformer specifically designed to provide isolation between the primary and secondary circuits. It works by creating a protective barrier that shields the secondary circuits from electrical shock, power surges, or electromagnetic interference from other equipment.
An isolation transformer is connected between the power supply (input) and an electrical circuit or device (output) to prevent electrical currents from traveling directly between circuits. This isolation reduces the risk of equipment damage and protects people from electric shock.
Isolation transformers are designed to keep the supply side and the load side electrically separated. They usually provide the same voltage at the output as the input, although voltage conversion is also possible and commonly used when required. Their main purpose is to create electrical separation, improving safety and reducing unwanted noise in the system.
Many isolation transformers also include an electrostatic shield between the internal components, helping block high-frequency noise from passing through and providing additional protection for critical equipment.
There are many benefits of using isolation transformers. Here are some of the most common benefits:
- Increased Safety: The isolation provided by isolation transformers helps to protect people and equipment from potential electrical shock.
- Reduced Noise: Isolation transformers reduce electromagnetic interference between circuits, thus reducing noise in the system.
- Increased Reliability: Isolation transformers can also help to improve the reliability of a circuit by reducing the chances of power surges or shorts.
- Cost Savings: Isolation transformers are usually more affordable than other types of transformers.
Overall, isolation transformers are a great way to help protect electrical systems from potential damage and interference.
For many applications, isolation transformers may not be necessary. However, they can provide significant safety and performance benefits in certain situations.
For example, isolation transformers are often used in industrial settings where electrical safety is paramount, and isolation cannot be provided by other means.
They can also be beneficial for sensitive equipment that is prone to electrical interference, or in situations where power surges are a common problem.
Isolation transformers are used in a range of applications. Some of the most common uses include:
- Voltage isolation: isolation transformers are used to provide isolation between two circuits and reduce interference and electrical noise.
- Surge protection: isolation transformers can help to protect devices from unexpected voltage spikes and reduce the risk of short circuits.
- Industrial applications: isolation transformers provide isolation for industrial machinery, helping to reduce the risk of electrical shock.
Overall, isolation transformers are an important component of many installations. They provide isolation between circuits and can help to reduce the risk of electrical shock and interference.
If you’re looking for a way to increase the safety and reliability of your system.
When selecting an isolation transformer, ensure it meets the specific voltage, current, and power requirements of your application. The right transformer provides effective isolation and protection, tailored to the operational demands of your system.
Isolation transformers are an important component of many electrical installations. They provide isolation between circuits and can help to reduce the risk of electrical shock and interference.
If you’re looking for a way to increase the safety and reliability of your system, isolation transformers may be the perfect solution.
At Southern Electronic Services, we carry a wide range of isolation transformers for all types of applications. Contact us today to find out more about isolation transformers and how they can benefit your system.
Transformer Solutions Made Simple
Provide your project details and we’ll respond promptly with expert guidance tailored to your needs.
