Single-phase transformers

Production of single-phase transformers

Single-phase transformers are electrical transformers that operate in alternating current and are used to transfer electrical power from one voltage level to another. The transformers are comprised of a magnetic core and at least two electric coils. The coils are classified according to the number of turns, those with high voltage (HV) with a greater number of turns (with fewer sections) and those with low voltage (LV) with a lesser number of turns (with fewer sections).

The single-phase autotransformers, contrary to the single-phase transformers, have a single winding, and therefore do not have the galvanic separation between the two windings.

The S.V.T.I. single-phase transformers and single-phase autotransformers are designed and manufactured with top-quality materials, electrolytic conductors in copper wire, ribbon cable and aluminium, insulated with high dielectric and thermal properties (classes F and H), impregnated with paint or epoxy resins, with extremely sturdy and safe mechanical support suitable for any installation requirement.

S.V.T.I. single-phase transformers and single-phase autotransformers can be supplied complete with accessories and custom wiring, based on the specific needs of the end client.

On request, a metal box to protect the machinery with varying degrees of protection can be supplied.

Among the primary and secondary electric windings, a protective shield can also be applied that ensures a greater insulation; in addition, upon request thermal protection against overheating can be applied on the primary winding, which can be automatic or manual thermal reset, depending on the required applications.

The quality of S.V.T.I. single-phase transformers and single-phase autotransformers is verified on several levels: each phase of implementation is checked, from the initial winding up to the final test of the transformer itself. Upon conclusion of production, each transformer is tested 100%. In this way, the electromagnetic performance and safety degree is certified for each transformer. The pre-testing as well as the final testing is performed in accordance with applicable CEI EN 61558 - CEI 96.7 - 96.8 - CE regulations applicable, according to the type of transformer and its use.

The careful overseeing of production processes and customisation of testing with dedicated and specially-designed equipment guarantees maximum reliability for S.V.T.I. transformers.


Also to note is that the S.V.T.I. single-phase transformers and single-phase autotransformers are made with automatic machinery to ensure maximum reliability and repeatability in electric tolerance parameters.

S.V.T.I. designs and develops different types of single-phase transformers and single-phase autotransformers designed and customised according to the needs of the end user by maximising performance and preventing any kind of problem. The S.V.T.I. single-phase transformers and single-phase autotransformers, cover a wide range of applications with dimensional and technical characteristics that range from standard to more complex customisation.


S.V.T.I. supports its customers from the design and customisation of the single-phase transformers and single-phase autotransformers, so as to guarantee the best results in economic and technical performance terms.

The S.V.T.I. electrical transformers find their application in several sectors, such as in that of control panels, home automation and more generally in all applications requiring a variation of voltage with respect to that which these same transformers are fed.
Precise and binding tests ensure a high degree of safety and reliability for each transformer produced, in accordance with applicable national and international regulations.


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