Three-phase transformers
Three-phase transformers - Reliable performance for industrial power supplies
Efficient transformer technology for industrial applications
Three-phase transformers are essential for a stable and powerful power supply in industrial systems. Rist Transformatorenbau GmbH develops and manufactures high-performance transformer solutions that impress with their high reliability, thermal stability and standard-compliant design – “Made in Germany” for over 70 years.
Our three-phase transformers are used in numerous industries: mechanical engineering, automation, medical technology, testing technology, power distribution and many more.
Examples of our transformers
Our range of three-phase transformers
We manufacture a wide range of three-phase transformers in various power ranges and designs – precisely tailored to your application:
Three-phase dry transformers (50 VA – 150 kVA)
Three-phase isolating transformers
Three-phase control transformers
Three-phase autotransformers
Special transformers for frequency converters and special applications
Open or encapsulated construction
Optional: UL-compliant production
Technical advantages of our three-phase transformers
High operational reliability even under continuous load
Low power losses thanks to optimized winding and core technology
Durable and low-maintenance
Quiet operation
Compact, customizable designs
Thermal load capacity up to insulation class F/H
UL-certified materials and manufacturing processes on request
UL-compliant production & standards
Our three-phase transformers are manufactured to UL standards on request – ideal for use on the US market. Documented insulation systems and approved materials are used.
We manufacture according to the following relevant standards:
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EN 61558-2-4 / -2-6 (isolating and control transformers)
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EN 61558-2-13 (autotransformers)
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EN 61558 (power supply units in general)
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Further standards as required
Why transformers from Rist?
✅ Over 70 years of experience in transformer construction
✅ Manufactured in Germany with in-house development and production
✅ Tailor-made solutions – even in small quantities
✅ Short delivery times thanks to high vertical integration
✅ UL-compliant versions for the international market
✅ Personal advice from an owner-managed company
What customers should know about three-phase transformers
Discover all our transformers, transformer power supplies and chokes here
A three-phase transformer is an essential component in electrical systems, particularly in industry, mechanical engineering or energy distribution. It converts electrical energy between different voltage or current levels in the three-phase network and ensures that machines and systems work safely, efficiently and without faults.
In contrast to single-phase transformers, a three-phase transformer processes three separate AC systems simultaneously – this enables more even power transmission, lower line losses and a more compact design. The most common applications range from isolating transformers for galvanic isolation and control transformers in control cabinets to autotransformers that save space and weight.
Important for our customers: Three-phase transformers can be individually adapted to your requirements. This includes not only power and voltage, but also design, protection class, connection type or insulation materials. For special requirements – such as for export to the USA or Canada – we also offer UL-compliant versions.
For you as a user, this means that you don’t just get any standard transformer from us, but a solution that fits your application exactly – whether for a control cabinet, a medical system or an industrial control system. We advise you personally, accompany your project from the initial idea through to commissioning and remain at your side as a long-term partner.
Rely on our experience and let us advise you individually – we look forward to hearing from you.