Three-phase to single-phase transformers

Three-phase to single-phase transformers, commonly referred to as "tri-mono", convert a three-phase network into a single-phase network while ensuring better load distribution across the three-phase network than a simple phase-to-neutral connection.

As with all electrical transformers, it is an isolation transformer with substantial galvanic isolation, generally 3,000 Volts minimum. Like more conventional transformers, it can therefore also play a role in separating electrical networks.

The three-phase to single-phase transformer generally complies with the power transformer standard (IEC 60076-11). Most often installed in technical rooms or close to machinery, they are usually enclosed (IP21, IP23 or IP33) to protect people. They can also be supplied "Bare" (IP00) for installation in a secure cabinet, or "Weatherproof" (IP5X) if the environment is subject to heavy splashing.

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Transformer Three-phase-Single-phase 400V / 230V

Transformer Three-phase-Single-phase 400V / 230V

Low-voltage

This Tri-Mono 400V – 230V transformer, with its specific coupling, offers three key features: it converts a three-phase primary network into a single-phase network while limiting supply network imbalance; it provides substantial galvanic isolation, from 3,000 to 4,500 Volts depending on the version; and it […]

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Three-phase to single-phase transformers

Three-phase to single-phase transformers – custom-made

Specific voltages, particular power ratings, low or high frequency, special integration conditions or configurations: if your project does not match a standard reference, our teams will support you in designing a custom transformer.

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Note: if you are looking for a known Le Cosinus tri-mono transformer reference outside the standards listed on the site, you can search for it directly in the search engine. If it is listed, you will be able to obtain information about it and request a quote from us.

If you cannot find your product, contact us directly — we are able to reproduce products even if they were manufactured many years ago.

Standard three-phase voltages today are 400V in Europe, but many people still use the designation 380V for the three-phase network. Our products, rated at 400V, will replace products displaying older voltages without difficulty. They will only perform better!

Please note that all our low voltage transformers are systematically vacuum and pressure impregnated with tropicalised resin. This technique is a guarantee of quality that fewer and fewer companies take the time to implement.

For any custom products, please don't hesitate to contact us. We can extensively adapt our products to all your applications.

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