TES Transformer Electro Service S.r.l.

Via Seriola,74, 25035 Ospitaletto - Brescia
Italy

Telephone +39 030 6840628
Fax +39 030 6847560
info@tes.st

Location

Hall map

METEC 2015 hall map (Hall 4): stand D36

Fairground map

METEC 2015 fairground map: Hall 4

Contact

Danilo Dosi

Executive board/managing director
Marketing, sales, advertising, PR

Via Seriola, 74
25035 Ospitaletto / Brescia, Italy

Phone
+390306840628

Fax
+390306847560

Email
d.dosi@tes.st

Filippo Buttini

Senior head of department
Marketing, sales, advertising, PR

Via Seriola, 74
25035 Ospitaletto / Brescia, Italy

Phone
+390306840628

Fax
+390306847560

Email
f.buttini@tes.st

Fabio Marton

Executive board/managing director
Research, development, design

Via Seriola, 74
25035 Ospitaletto, Italy

Phone
+390306840628

Fax
+390306847560

Email
f.marton@tes.st

Our range of products

Product categories

  • 03  Plant and equipment for steel making
  • 03.02  Electric steel production

Electric steel production

  • 04  Plant and equipment for non-ferrous metal production
  • 04.06  Components, ancillary equipment

Components, ancillary equipment

  • 10  Electrical engineering and process control technology
  • 10.01  Electrical equipment
  • 13  Miscellaneous equipment for metallurgical plants and rolling mills
  • 13.05  Maintenances and repair equipment

Maintenances and repair equipment

  • 14  Steel mills

Steel mills

Our products

Product category: Electric steel production

Three phase power transformers

Using its consolidated technology and the experience it has accumulated in the construction of oil-filled power transformers, TES designs, builds, tests, commissions and maintains power transformers with voltages of up to 420 kV and power ratings of up to 300 MVA.

Power transformers are used wherever it is necessary to connect systems for the generation, transmission, distribution and utilisation of electrical energy, which function at different voltages, in order to transfer large quantities of active and reactive energy between these systems.

The experience that TES has built up has allowed to company to become a leading brand both nationally and internationally in the power transformers market. The company’s products are used across a wide spectrum of applications by a plethora of major clients.

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Product category: Electrical equipment

Three Phase Rectifier Transformer

Using its consolidated technology and the experience it has accumulated in the construction of oil-filled three-phase rectifier transformers, TES designs, builds, tests, commissions and maintains transformers for rectifiers with power ratings of up to 100 MVA and primary voltages of up to 52 kV.

Today, there are numerous applications that require transformers to supply rectifiers with ever-increasing levels of power. The classic example is provided by those industries that use electrolysis processes for the production of aluminium, and the high secondary currents, together with the harmonic currents generated by the rectification systems, must be taken into account fully when designing transformers to power such loads.

Two types of rectifiers are available: thyristor rectifiers and diode rectifiers. In both cases, the transformers that power them must supply a gradually adjustable secondary voltage, which is normally produced via an on-load switch (OLTC). In cases in which the range of secondary voltages is high, the variation is produced through a regulation transformer, which can be located in a separate tank or in the same tank as the main transformer.

The construction of these transformers involves both the use of three-phase hubs with three or five columns (with free-phase secondary windings) and the use of two secondary windings (star/triangle), either magnetically coupled or magnetically uncoupled.

The experience that TES has built up has allowed to company to become a leading brand both nationally and internationally in the field of rectifier transformers. The company’s products are used across a wide spectrum of applications by a plethora of major clients.

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Product category: Electrical equipment

Series reactor for electric-arc furnaces

Using its consolidated technology and the experience it has accumulated in the construction of oil-filled series reactors for AC arc furnaces, TES designs, builds, tests, commissions and maintains oil-phase reactors with power ratings of up to 60 Mvar and voltages of up to 132 kV.

In arc furnaces, which use long arcs and high levels of secondary voltage, it is normally essential to introduce an additional reactor, which serves to stabilise the arc during fusion and to optimise the functionality of the furnace. The furnace transformers are often used in series with reactors which have some regulation taps operated with either an on-load tap changer (OLTC), for maximum flexibility, or with a no-load tap changer (NLTC). The reactor can be built inside the main transformer cabinet, or alternatively, it can be entirely separate from it or located next to it.

This solution makes it possible to eliminate the costs of cabling the MV connections between the transformer and the reactor, thus making it possible to carry out maintenance work on the reactor without having to shut off the transformer. In this way, the overall reliability of the system can be enhanced.

The experience that TES has built up has allowed to company to become a leading brand both nationally and internationally for in series reactors for arc furnaces. The company’s products are used across a wide spectrum of applications by a plethora of major clients.

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Product category: Electrical equipment

Single Phase Transformer EAF

Using its consolidated technology and the experience it has accumulated in the construction of transformers for AC arc furnaces (EAFs), TES designs, builds, tests, commissions and maintains single-phase furnace transformers with power ratings of up to 100 MVA and primary voltages of up to 132 kV.

Transformers for alternating current electric-arc furnaces (AC EAFs) are used throughout the steel industry. They are used to power arc furnaces for the production of steel, which require high levels of power that must also be variable due to the frequent short-circuits, and also to power arc furnaces for the production of special alloys – these alloys often require the deployment of three single-phase furnace transformers instead of a single three-phase transformer in order to balance the total phase impedance through an equilateral-triangle layout of the units.

These transformers must be designed to resist the high levels of electrical, thermal and mechanical stress to which they are subject during utilisation. Other elements that must be taken into consideration when designing transformers for electric-arc furnaces are the high secondary currents required for the fusion process (dozens of kA) and the wide range of secondary voltages, which are normally regulated by an on-load tap changer (OLTC), either directly on the high-voltage winding or via an intermediate booster located within the same tank.

The experience that TES has built up has allowed to company to become a leading brand both nationally and internationally in the single-phase furnace transformers market. The company’s products are used across a wide spectrum of applications by a plethora of major clients.

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About us

Company details

TES – which stands for 'Transformer Electro Service' – is the successful result of the synergy that exists between the members of a team that has more than twenty years of experience in manufacturing high-power and high-current transformers.

Founded by some of Italian finest technicians, today TES is one of the most highly-evolved and qualified companies which designs, produces and tests Power transformers, EAF / SAF / ESR / LF transformers, Rectifier transformers, and Series Reactors.

Within TES, experience and technology are perfectly integrated, since the company's operations are co-ordinated by the most innovative manufacturing, organisational and technological processes, which have enabled the company to make a name for itself in a multitude of international markets.

TES can guarantee not only the high quality standards of its products, but also the efficient after sales service, the international commercial experience and the customization of its products based on its Customers’ needs. The company has what it takes to meet any requirement for development and support across the Metallurgical Industry’s world.

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Company data

Sales volume

10-49 Mio US $

Export content

> 75%

Number of employees

50-99

Foundation

1998

Company information as a PDF file