• 17 Junction St, Yennora NSW 2161, Australia
  • (02) 9157 9096
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Our team is Creating Success by Understanding our Customer’s Mission

Special Transformers by Hunter

At Hunter Transformers, we are more than specialist transformer manufacturers.

We are more than an engineering team that listens to, and acts on every customer’s request.

We are a group of passionate people, working together, and with the customer, to understand how we can create the best value.

Supply Chain Management

Take advantage of our competitive advantages, managing supply chain outcomes to create the most reliable and quality transformer, at the right price

Supportive Local Service

Based out of Sydney, we are able to respond any of your requests and enquiries in the shortest time possible.

Creative Solutions

With engineering experience from a broad range of backgrounds, we are confident we can make the right transformer solution for your special project requirements.

Quality Assured, Tried & Tested

We think like engineers, and act like engineers, taking care of all the fine details, so you have the right transformer on site, at the right time.

View Our Mission
500kVA 66kV
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2000kVA 22kV ONAN(al)
20241209_013135325_iOS
20250526_234509204_iOS
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20241209_013226558_iOS
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ABOUT US

About Hunter Transformers

50 Years of Power Solutions, Built to Last

From Sydney’s heart to Australia’s biggest projects, Hunter Transformers has been engineering custom transformer solutions that keep mining equipment running and industries thriving. Whether it’s a dry-type unit for a commercial area re-development or a multi-million dollar package of custom containerised transformers for mining operations, our half-century of expertise means we don’t just build transformers—we solve their power challenges.

Every project tells a story of innovation, precision, and partnership. Ready to discover what five decades of engineering excellence can do for your next project?

Learn More
Meet our Team

Custom solutions, unique manufacturing process and quality crafted by talent.

Call us

Market Leaders Since 2002

Hunter Transformers has been providing superior customer service, for more than 40 years. We have always had focus on the customer’s mission, and over, serving a wide range of customers and markets. We collaborate with our customers to provide cost-effective and innovative solutions to the power circuits they are working with, and we work as a team to understand and solve our customers’ transformer problems while providing excellent customer service.

Our mission is to identify and solve electrical problems for our customers.

We strive to be an important member of our customers’ teams.

We value innovation and creativity, and we strive to improve everything we do.

In our industry, a quick response time and attention to detail are essential. Special Transformer has consistently provided excellent service due to the professionalism and expertise of its staff. We are very pleased with the product’s performance and prompt after-sales service.
“I just wanted to express my gratitude for all of your efforts in preparing the transformer core and coil for our application. Everything fits perfectly, and the unit works flawlessly. When the need for a transformer replacement arises in the future, you will be the first call.
Thank you once more.”

In our industry, a quick response time and attention to detail are essential. Special Transformer has consistently provided excellent service due to the professionalism and expertise of its staff. We are very pleased with the product’s performance and prompt after-sales service.
“I just wanted to express my gratitude for all of your efforts in preparing the transformer core and coil for our application. Everything fits perfectly, and the unit works flawlessly. When the need for a transformer replacement arises in the future, you will be the first call.
Thank you once more.”

In our industry, a quick response time and attention to detail are essential. Special Transformer has consistently provided excellent service due to the professionalism and expertise of its staff. We are very pleased with the product’s performance and prompt after-sales service.
“I just wanted to express my gratitude for all of your efforts in preparing the transformer core and coil for our application. Everything fits perfectly, and the unit works flawlessly. When the need for a transformer replacement arises in the future, you will be the first call.
Thank you once more.”

In our industry, a quick response time and attention to detail are essential. Special Transformer has consistently provided excellent service due to the professionalism and expertise of its staff. We are very pleased with the product’s performance and prompt after-sales service.
“I just wanted to express my gratitude for all of your efforts in preparing the transformer core and coil for our application. Everything fits perfectly, and the unit works flawlessly. When the need for a transformer replacement arises in the future, you will be the first call.
Thank you once more.”

Inquire Now!!

 Fill out the form below for inquiry

Market Leaders Since 2002

Hunter Transformers has been providing superior customer service, for more than 40 years. We have always had focus on the customer’s mission, and over, serving a wide range of customers and markets. We collaborate with our customers to provide cost-effective and innovative solutions to the power circuits they are working with, and we work as a team to understand and solve our customers’ transformer problems while providing excellent customer service.

In our industry, a quick response time and attention to detail are essential. Special Transformer has consistently provided excellent service due to the professionalism and expertise of its staff. We are very pleased with the product’s performance and prompt after-sales service.
“I just wanted to express my gratitude for all of your efforts in preparing the transformer core and coil for our application. Everything fits perfectly, and the unit works flawlessly. When the need for a transformer replacement arises in the future, you will be the first call.
Thank you once more.”

In our industry, a quick response time and attention to detail are essential. Special Transformer has consistently provided excellent service due to the professionalism and expertise of its staff. We are very pleased with the product’s performance and prompt after-sales service.
“I just wanted to express my gratitude for all of your efforts in preparing the transformer core and coil for our application. Everything fits perfectly, and the unit works flawlessly. When the need for a transformer replacement arises in the future, you will be the first call.
Thank you once more.”

In our industry, a quick response time and attention to detail are essential. Special Transformer has consistently provided excellent service due to the professionalism and expertise of its staff. We are very pleased with the product’s performance and prompt after-sales service.
“I just wanted to express my gratitude for all of your efforts in preparing the transformer core and coil for our application. Everything fits perfectly, and the unit works flawlessly. When the need for a transformer replacement arises in the future, you will be the first call.
Thank you once more.”

In our industry, a quick response time and attention to detail are essential. Special Transformer has consistently provided excellent service due to the professionalism and expertise of its staff. We are very pleased with the product’s performance and prompt after-sales service.
“I just wanted to express my gratitude for all of your efforts in preparing the transformer core and coil for our application. Everything fits perfectly, and the unit works flawlessly. When the need for a transformer replacement arises in the future, you will be the first call.
Thank you once more.”

FAQs

Frequently asked

Do you need a Transformer for your project?

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Need help choosing the right transformer?
We are here to help!!

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Kiosk Solutions (up to IP64)

Technical capabilities

For transformers up to 3MVA frame size, up to 33kV voltage rating.

Applications

Suited for outdoor installations.

Performance Advantages

Integrated oil bund and weatherproof kiosk to keep the oil bund for oil only. Less site preparation work for installation.

Safety Considerations

Transformer with standard safety accessories. Keep the site from oil spilling issue.

Target Environments

Mining, Construction site etc.

Mini Substations (11-33kV)

Technical capabilities

For transformers up to 3MVA frame size, up to 33kV voltage rating.

Applications

Suited for outdoor installations.

Performance Advantages

Less installation work, can be relocated with projects.

Safety Considerations

MV and LV protections are included.

Target Environments

Minding, Construction etc.

Earthing Transformers

Our Earthing Transformers (Oil filled), are great for situating in your system which requires the addition of a neutral for earth protection.

Technical capabilities

Up to 3MVA frame size, up to 33kV voltage rating

Applications

Suited for outdoor installations. Use for control ground fault current and Earth-fault factor. (ref: IEEE Std C62.92 series)

Performance Advantages

Specially designed to withstand your site fault levels, with practical and theoretical condition testing on the design available.

Safety Considerations

With critical safety accessories.

Target Environments

Renewable, microgrid etc.

Dry Type - Cast Resin & VPI Transformers

Our Dry Type Transformers (AS60076.11) are great for more protected, indoor environments, where avoidance of potential oil spills is critical. The transformer has much less maintenance required in comparison to oil-filled alternatives

Technical capabilities

Up to 20MVA frame size, up to 33kV voltage rating. Available in MEPS and HEPS efficiency rating.

Applications

Suited for indoor installations, to be used in conjunction with surge protection.

Performance Advantages

Able to be installed closer to other structures (1.5m according to AS 2067), has no risk for oil leaks.

Safety Considerations

Safety clearances must be maintained to live parts.

Target Environments

Ideal for indoor environments and in sensitive areas, such as Hospital Basement.

Enhanced Protected Transformers

Our Enhanced Protected Transformers (Less flammable K-type, KNAN, per AS 2067:2016) are the perfect installation for more exposed, outdoor environments which are situated close to other installations (eg. non-fire rated wall). Being enhanced protected, the transformer has greater tank structural design, alongside a high-rate pressure relief valve. The customer is responsible for installation of HV and LV fuses to maintain Enhanced Protected certification.

Technical capabilities

Up to 50MVA frame size, up to 66kV voltage rating. Available in MEPS and HEPS efficiency rating.

Applications

Suited for most outdoor installations, when used in conjunction with oil bunding (we can provide a kiosk solution if no on-site bunding available).

Performance Advantages

Resilience to outdoor environments, able to be installed closer to other structures (ref AS2067:2016 Table 6.1), better robust protection against physical damage, transformer design clearances more effectively managed with the insulating properties of the oil.

Safety Considerations

Bunding must be used to avoid oil spill leakage to surrounding environments.

Target Environments

Ideal for outdoor installations and where transformer is installed close to other structures, able to be offered in hot dip galvanised finish when environment is corrosive.

Oil Filled Transformers

Our Mineral Oil Filled Transformers (ONAN, as per AS 60076) are the perfect installation for more exposed, outdoor environments. The steel tank, filled with oil, which surrounds the transformer, offers a high resistance to external corrosion, and the insulating oil assists in clearances required for the transformer design.

Technical capabilities

Up to 50MVA frame size, up to 66kV voltage rating. Available in MEPS and HEPS efficiency rating as per 2374.1.2-2003.

Applications

Suited for most outdoor installations, when used in conjunction with oil bunding (we can provide a kiosk solution if no on-site bunding available).

Performance Advantages

Resilience to outdoor environments, better robust protection against physical damage, transformer design clearances more effectively managed with the insulating properties of the oil.

Safety Considerations

Bunding must be used to avoid oil spill leakage to surrounding environments.

Target Environments

Ideal for outdoor installations, able to be offered in hot dip galvanised finish when environment is corrosive.

GNAN Transformers (non-certified)

Our GNAN transformer is an advanced electrical power conversion system designed for high-performance applications, though it requires careful environmental considerations as it lacks explosive-proof certification.

Technical capabilities

Up to 3MVA frame size, up to 66kV voltage rating. Available in MEPS and HEPS efficiency rating.

Applications

Excels in surface and first level subsurface – industrial facilities, data centers, renewable energy systems, or specialized manufacturing environments

Performance Advantages

Higher efficiency, better thermal management, reduced maintenance requirements.

Safety Considerations

While not explosive-proof certified, it satisfies surface level installations or initial sub surface installations, where explosion certification is not mandatory, but the transformer still requires the level of protection only offered by a GNAN transformer.

Target Environments

Ideal for surface, or first level sub-surface installation, where explosion certification is not mandatory.