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3 Phase Custom Transformers

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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.

3 Phase Custom Transformers — 3ph isol TF 1000v / 415v @ 200kVA IP65 with switchgear

Reliable solutions, great service – fast.

All of our transformers are designed and built here in Australia, giving us the ability to provide a custom solution quickly. SES keeps a large range of raw materials in stock, to be able to turn projects around quickly, reducing any potential downtime pressures on your end. Check out our capabilities below, and touch base with your custom 3-phase transformer requirements today.

If you’re not sure of your transformer requirements, please give us a call 03 9706 4202 and speak to our team.

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Manufactured to Your Specifications

SES will build three-phase transformers to meet your specific project needs:

1kVA up to 750KVA power rating
Input voltage – designed to your needs, up to 3.3kV
Output voltage – designed to your needs, up to 3.3kV, multiple output windings if required
Isolation transformer or auto-transformer (Note that an auto-transformer is a single-winding transformer, providing a smaller & cheaper alternative to a double-wound T/F, useful when isolation from the input mains is not required)
± 2.5% & ± 5% tappings available if required
Insulation classes – Class F (150°C) & Class H (180°C) as standard
Low load regulation
Enameled copper windings
Copper busbar terminals standard, other termination options available
Brass Earth stud provided on frame for connection
Electro-static screening if required
Tough varnish impregnation insulation coating
Additional switchgear fitting if required
Choice of enclosure rating (open, IP23, IP65, other)

Other Transformers

3 Phase Step Down Transformers

Ideal for running international 3-phase equipment in Australia. Stepping 415V down to your required voltage (200V, 220V, 380V, other)

3ph 415V Isolation Transformer

3-phase LV isolation transformers up to 750kVA designed and constructed to your specific requirements built in our Melbourne-based factory.

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.