PRODUCTS . PORTFOLIO - aib.bs.it · Product: Three-phase LF transformer Characteristics: Rated...

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One of the most well developed and qualified manufacturer of high-power & high-current transformers.

Design, manufacturing, repair, revamping, maintenance of po-wer, special & electric arc furnace transformers, series & shunt reactors.

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TeS

TES has adopted, since many years now, the Quality and Safety and Health Assurance systems, currently in compliance with ISO 9001:2008, ISO 14001:2004, and ISO 18001:2007 standards. TES’ Quality Assurance is described in the quality manual and implemented through the “Quality Control Plans” prepared for every job. Product conformity, is checked by specialized experts, who carry out production controls and final inspection in the Testing Room. The Health and Safety systems instead, for the protection of all TES’ employees and the surrounding Environment, are followed by other specialized experts who study the potential risks, internal and external to the company and make sure, these could be avoided. TES Quality and Safety and Health Assurance systems, are certified by SQS and IQNet.Ce

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eddy losses, short circuit forces, magnetic and electric field analysis by finite elements software.Mechanical design with Autodesk inventor.Mathcad and Matlab developed code for transient phenomena cal-culations.

new winding department with dry treatment winding oven and mechanical stabilization by press with the following features:

n° of winding machines: 9Max. coil weight: 8000 kg Max. press load: 150 tLifting capacity: 10 t

New testing room:Insulation level class: 420 kVCapacity of testing unit:up to 500 MVA 420 kV transfor-mer up to 400 MVA 440/230 kV autotransformerCapacity of reactive power:up to 124 Mvar

New impulse test generator:Manufacturer:Passoni & Villa (ALSTOM)Rated voltage impulse: 2000 kVTotal energy power: 200 kJN° of stages: 10 of 200 kV eachCapacitive voltage divider:2000 kVData acquisition system: 12 bit

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Three-phase and single pha-se transformers for elec-tric arc, ladle, refining and submerged arc furnaces for the steel market and ferroal-loy industries.

SeRIeS & SHUnTReACTORS

Three-phase and single-phase series reactors for electric arc furnace application in the steel market and shunt reactors for HV networks.

ReCTIFIeR- COnVeRSIOnTRAnSFORMeRS

Three-phase and single-phase rectifier transformers for indu-strial network and traction appli-cations.

POweRTRAnSFORMeRS

HV/MV and MV/MV power, distri-bution and auto transformers for power plant, transmission, di-stribution and industrial applica-tions and for mobile substations.

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Repair, revamping and mainte-nance of power, special, furnace transformers and of reactors for all the applications.

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cumulated in the construction of transformers for AC and DC arc furnaces (eAFs), TeS designs, manufactures, tests, com-missions and maintains three-phase furnace transformers with power ratings of up to more than 300 MVA .

Transformers for electric-arc furnaces are used throughout the steel industry. They are used to power arc furnaces for the pro-duction 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 iron alloys - these alloys often require the deployment of three single-phase furnace transformers instead of a single three-phase transfor-mer in order to balance the total phase impedance through an equilateral-triangle layout of the units or in applications of mo-dern steel processes as SAF, VAR, eSR or Smelters.

These transformers must be designed and manufactured to resist to the high levels of electrical, thermal and mechanical stresses to which they are subject during utilisation, characteri-zed by high levels of power oftenly variable due to the frequent short circuits.

Other elements that must be taken into consideration when designing transformers for electric-arc furnaces are the high secondary currents required for the melting 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 bo-oster located within the same tank.

An additional option that is now often used in furnace transfor-mers is the closure of the secondary electrical circuit (triangle) within the transformer tank.Furnace transformers are often used in series with reactors, which serves to enhance the stability of the arc. The reactor can be built inside the main transformer tank, or alternatively, it can be entirely separate from it or located next to it (OBR - On Board Reactor).

This solution (OBR) makes possible the elimination of the costs of the MV cabling 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.

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Year: 2007Product: Three-phase eAF transformerCharacteristics:Rated power:Primary voltage:Secondary voltages:Tap-changer:N° of taps:Frequency:Connection:Secondary current:Cooling system:Total mass:

156 MVA33000 V 1251÷1119÷653 V OLTC 18 50 Hz Dd6 80,5 kA OFwF 135000 kg


170 MVA34500 V 1380÷1061÷746 V OLTC 18 50 Hz Dd4 92,46 kA OFwF 180000 kg

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220 MVA33000 V1450÷1278÷810 VOLTC2750 HzDd099,4 kAOFwF220000 kg

204 MVA33000 V1350÷1100÷750 VOLTC2550 HzDd (open)10,7 kAOFwF203000 kg

Year: 2013Product: Single-phase SAF transformersCharacteristics:Rated power:Primary voltage:Secondary voltages:Tap-changer:N° of taps:Frequency:Secondary current:Cooling system:Total mass:

Year: 2014Product: Single-phase SAF transformersCharacteristics:Rated power:Primary voltage:Secondary voltages:Tap-changer:N° of taps:Frequency:Secondary current:Cooling system:Total mass:

12 MVA20000 V121÷237,9÷291 VOLTC3350 Hz60,5 kAOFwF35000 kg

16 MVA345000 V140÷291,2÷340 VOLTC8360 Hz54,9 kAOFwF35000 kg

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Year: 2006Product: Three-phase LF transformerCharacteristics:Rated power:Primary voltage:Secondary voltages:Tap-changer:N° of taps:Frequency:Connection:Secondary current:Cooling system:Total mass:


Among its wide production range, TeS designs, manufactures, tests, commissions and maintains three-phase ladle furnace (LF) transformers.

LF Transformers are used throughout the steel industry and are often deployed in combination with electric-arc furnaces (eAFs).when designing these transformers, it is necessary to take into consideration the same factors that apply to the design of those that are used to power electric-arc furnaces: high levels of electrical, thermal and mechanical stresses, high secondary currents and tap changing of the secondary vol-tages. As with eAFs, an additional option that is now often used in furnace transformers, is the closure of the secondary electrical circuit (triangle) within the transforme tank.



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36 MVA33000 V400÷350÷200 VOLTC1250 Hzyd (open)59,4 kAOFwF51500 kg

Year: 2010Product: Three-phase series reactorCharacteristics:Rated inductance:Primary voltage:Tap-changer:N° of taps:Frequency:Current:Cooling system:Total mass:

4,8 Ohm34500 VOLTC1150 Hz1643 AOFwF79000 kg

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S TeS designs, manufactures, tests, commissions and main-tains single-phase and three-phase oil-type reactors.

In electric arc furnaces, which use long arcs and high values 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 de-energized tap changer (DeTC). The reactor can be built either inside the main transformer tank, or alternatively, it can be entirely separate from it or located next to it (OBR).

This solution (OBR) makes possible the elimination of the costs of the MV cabling connections between the transfor-mer 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 sy-stem can be enhanced.

Year: 2014Product: Three-phase shunt reactorCharacteristics:Rated power:Primary voltage:Frequency:Total mass:

15 Mvar145000 V50 Hz44000 kg

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KSIn long HV networks there is often the need to install single-phase or three-phase shunt reactors to compensate the lar-ge amount of reactive power generated by the network itself during no load conditions. Shunt reactors are nowadays an important equipment needed to help managing and control-ling the energy flows in the HV networks.

Year: 2006Product: Three-phase & single-phase rectifier transformersCharacteristics:Rated power:Primary voltage:Secondary voltages: Tap-changer:N° of taps:Frequency:Connection:Secondary AC current:Cooling system:Total mass:

5 MVA13,8 kV250÷130 VOLTC1960 HzDd0 - Dy11 ± 7,5°6,3 kAOFAF26000 kg

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S TeS designs, manufactures, tests, commissions and main-tains single-phase and three-phase rectifier and conversion transformers for industrial, network and traction applications.

Today, there are numerous applications that require similar transformers with ever-increasing levels of power. The clas-sic example is provided by those industries that use elec-trolysis processes or for the production of aluminium. The high secondary currents, together with the harmonic cur-rents generated by the rectification systems, must be fully taken into account 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, sometimes shifted, which can be located in a separate tank or in the same tank as the main transformer.

The construction of these transformers involves sometimes the use of both different primary voltages, tertiary filter win-dings, IPT (Inter Phase Transformers), saturable reactors and the use of two secondary windings (star/triangle), either ma-gnetically coupled or magnetically uncoupled.

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Year: 2011Product: Three-phase rectifier transformerCharacteristics:Rated power:Primary voltage:Secondary voltages:Tap-changer:N° of taps:Frequency:Connection:Secondary AC current:Cooling system:Total mass:

Year: 2013Product: Three-phase rectifier transformerCharacteristics:Rated power:Primary voltage:Secondary voltages:Frequency:Connection:Secondary AC current:Cooling system:Total mass:

28,2 MVA60 kV570÷390 VOLTC2360 HzDd10 – Dy1115 kAOFwF62000 kg

8,7 / 3x2,9 / 2 MVA132000 V3x5400 V50 Hzy/yO-yO-yO/d113x698,5 AOnAn52000 kg

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S Power and distribution transformers and autotransfor-mers are used wherever it is necessary to connect sy-stems 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.

Power and distribution transformers are nowadays used as-well in mobile substations, needed to feed energy where a standard substation is not or cannot be built.The geometry and the particular characteristics some-times used in those transformers (multiple, primary and secondary voltages, plug-in connections, etc.) make them special in the design and in the costruction.

Year: 2008Product: Three-phase power transformer for power plantCharacteristics:Rated power:Primary voltage:Secondary voltages:Tap-changer:N° of taps:Frequency:Connection:Cooling system:Total mass:

63/78 MVA132000 V10500 VOLTC2550 Hzstar with neutral/deltaOnAn/OnAF96000 kg

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Year: 2008Product: Three-phase power transformer for industriesCharacteristics:Rated power:Primary voltage:Secondary voltages:Tap-changer:N° of taps:Frequency:Connection:Cooling system:Total mass:

120 MVA220000 V21000 / 31500 VOLTC1750 Hzynd11OnAF168000 kg

Year: 2009Product: Three-phase power transformer for industriesCharacteristics:Rated power:Primary voltage:Secondary voltage:Tap-changer:N° of taps:Frequency:Connection:Cooling system:Total mass:

160 MVA225000 V33000 VOLTC2150 Hzstar with neutral/deltaOnAF190000 kg

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Year: 2010Product: Three-phase power transformer for mobile substationCharacteristics:Rated power:Primary voltage:Secondary voltage:Tap-changer:N° of taps:Frequency:Connection:Cooling system:Total mass:

Year: 2014Product: Three-phase power transformer for mobile substationCharacteristics:Rated power:Primary voltage:Secondary voltage:Tap-changer:N° of taps:Frequency:Connection:Cooling system:Total mass:

35 MVA145000 V72500 VOLTC2150 Hzynd5OFAF73000 kg

45 MVA132000 V33000 VOLTC1750 Hzynd11ODAF60000 kg

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Year: 2010Product: Repairing of a three-phase DC furnace transformerCharacteristics:Power:Primary voltage:Secondary voltage:Tap-changer:N° of taps:Frequency:Connection:Cooling system:Total mass:

87 MVA21000 V782,1 - 395,3 VOLTC1150 Hzdelta / delta - starOFwF120000 kg

TeS has been created with the aim not only to provide pro-ducts or services, but through the quality and efficiency of these processes, to ensure that the customer production cycles are steady and continuous.The after sales service is our indispensable tool to support our customers with maintenance and diagnostic check of transformers. A comprehensive and timely service that moni-tors machine reliability, prevent any anomalies and promptly implements actions to avoid any interruption in the customer production cycles.For the reason TeS has housed in a coverad area of 4000 m² a new business unit entirely dedicated to service, desi-gned for repairing, upgrading and performing the routine or extraordinary maintenance of any type of transformers, even produced by other manufacturers.TeS is equipped with facilities and tools for emergency servi-ce as well as equipment for oil treatment and an efficient la-boratory for physical - chemical and gas - chromatographic tests. In addition TeS has a mobile test lab able to provide measurements and inspections on customer’s site.

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Year: 2011Product: Commissioning of a three-phase power transformer 100 MVA

Year: 2013Product: Revamping and rewinding of a three-phase power transformerCharacteristics:Power:Primary voltage:Secondary voltage:Tap-changer:N° of taps:Frequency:Connection:Cooling system:Total mass:

130 MVA215000 V31500 VOLTC2150 Hzynyn0OnAF178000 kg

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TES TRANSFORMER ELECTRO SERVICE S.r.l.Via Seriola, 7425035 Ospitaletto (BS)CF/PI 03438790176phone: +39 030.6840628-9fax: +39 030.6847560internet: www.testransformer.come-mail: [email protected]

PRODUCTS . PORTFOLIO - aib.bs.it · Product: Three-phase LF transformer Characteristics: Rated...

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