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# TET-ESTEL: Company develops, manufactures, and supplies a broad range of power converter equipment and power semiconductors, focusing on complex technological solutions and production “turnkey” delivery.

## Sitemaps
[XML Sitemap](https://tet-estel.com/sitemap_index.xml): Includes all crawlable and indexable pages.

## Posts
- [TET ESTEL at PCIM Europe 2026](https://tet-estel.com/tet-estel-at-pcim-europe-2026/): If you are visiting PCIM Europe 2026, we would be happy to meet you at:
- [Students from Pirita Majandusgümnaasium Visit TET ESTEL Factory](https://tet-estel.com/students-from-pirita-majandusgumnaasium-visit-tet-estel-factory/): TET ESTEL recently had the pleasure of welcoming students from Pirita Majandusgümnaasium to our production facility in Tallinn.
- [TET ESTEL at Titanium Europe 2026](https://tet-estel.com/tet-estel-at-titanium-europe-2026/): TET ESTEL is pleased to announce its participation in the Titanium Europe 2026 Conference & Expo, organized by the International Titanium Association.
- [Containerized Rectifier for VAR Furnace Power Supply](https://tet-estel.com/containerized-rectifier-for-var-furnace-power-supply/): This fully containerized rectifier system is not just a piece of equipment; it is a turnkey solution designed to operate under the most demanding industrial conditions, specifically engineered to provide stable, high-capacity power for a VAR furnace.
- [Engineering Power for Cutting-Edge Science](https://tet-estel.com/engineering-power-for-cutting-edge-science/): Right now, in a high-voltage testing laboratory in Slovenia, the pre-series unit of a 60 kV 40 A diode rectifier manufactured by TET ESTEL is undergoing rigorous high-voltage tests. This system was designed and assembled by our engineers for the Large Hadron Collider project. Earlier, the prototype was successfully tested — a critical first step.
- [Christmas greetings](https://tet-estel.com/christmas-greetings-2026/): Other News
- [Extreme Conditions, Zero Compromise: Diesel GPU in Action](https://tet-estel.com/extreme-conditions-zero-compromise-diesel-gpu-in-action/): The new model of diesel GPU by TET ESTEL, recently delivered to the customer, has been successfully commissioned at the airport and is already operating in extremely low-temperature conditions.
- [TET ESTEL anniversary – 155!](https://tet-estel.com/tet-estel-anniversary-155/): Other News
- [155 Years of Innovation and Reliability](https://tet-estel.com/155-years-of-innovation-and-reliability/): The Estonian Chamber of Commerce and Industry (ECCI), the oldest and largest Estonian representative organization of entrepreneurs, published an interview with the CEO of TET ESTEL, revealing the key factors behind the company's longevity and competitiveness, as well as what makes it a trusted partner.
- [TET ESTEL in Kazakhstan](https://tet-estel.com/tet-estel-in-kazakhstan/): The President of Estonia made a state visit to Kazakhstan from 17-19 November 2025 accompanied by the members of the government and business delegation, including the representative of TET ESTEL.
- [Join us at Inter Airport Europe 2025!](https://tet-estel.com/join-us-at-inter-airport-europe-2025/): 🌍 Join us at Inter Airport Europe 2025! ✈️
- [TET ESTEL Moves Forward with Rectifier Project: Prototype Successfully Tested](https://tet-estel.com/rectifier-project-prototype-successfully-tested/): Continuing work on the full-bridge diode rectifier development project for CERN, TET ESTEL has successfully completed the first major milestone: the design, manufacture, and testing of a prototype of the future product.
- [Embassy of the Republic of Kazakhstan visits TET ESTEL](https://tet-estel.com/embassy-of-the-republic-of-kazakhstan-visits-tet-estel/): We are pleased to announce a visit of the Ambassador of the Republic of Kazakhstan Altay Kulginov and Deputy Head of Mission Anuar Adilbekov to TET ESTEL which took place on 16 May 20, 2025.
- [Equipment Shipment for Vacuum Induction Furnaces.](https://tet-estel.com/equipment-shipment-for-vacuum-induction-furnaces/): Today, TET ESTEL successfully completed the shipment of a full set of equipment for two separate projects. The delivery includes induction heating systems designed for vacuum induction furnaces.
- [TET ESTEL took part in PCIM Expo 2025](https://tet-estel.com/tet-estel-took-part-in-pcim-expo-2025/): Our company could explore the existing trends in power semiconductor market, present its products (thyristor, diodes, power modules) and technology to a wide audience, and establish new business ties.
- [TET ESTEL will take part at the PCIM Expo](https://tet-estel.com/tet-estel-will-take-part-at-the-pcim-expo/): Join us at the PCIM Expo 2025 – the leading exhibition for power electronics!
- [TET ESTEL participated in the Passenger Terminal Expo 2025](https://tet-estel.com/tet-estel-participated-in-the-passenger-terminal-expo-2025/): Recently, our company attended the world’s leading international airport conference and exhibition Passenger Terminal Expo 2025 in Madrid.
- [TET ESTEL started working on a new project for CERN](https://tet-estel.com/tet-estel-started-working-on-a-new-project-for-cern/): TET ESTEL, an Estonian electrical engineering company, has contributed to the supply of components for CERN's Large Hadron Collider (LHC) project.
- [TET ESTEL is taking part at Passenger Terminal Expo 2025](https://tet-estel.com/tet-estel-is-taking-part-at-passenger-terminal-expo-2025/): Passenger Terminal Expo 2025 – get ready for this must-attend Expo & Conference!
- [DIODES STUD](https://tet-estel.com/diodes-stud/): RECTIFIER DIODES
- [THYRISTORS STUDS](https://tet-estel.com/thyristors-studs/): PHASE CONTROL THYRISTORS
- [SUPPRESSOR STUD](https://tet-estel.com/suppressor-stud/): VOLTAGE SUPPRESSORS
- [THYRISTORS TABLETS](https://tet-estel.com/thyristors-tablets/): PHASE CONTROL THYRISTORS
- [SUPPRESSOR TABLETS](https://tet-estel.com/suppressor-tablets/): VOLTAGE SUPPRESSORS
- [DIODES TABLETS](https://tet-estel.com/diodes-tablets/): RECTIFIER DIODES
- [TURN-KEY COMPLEX SOLUTIONS](https://tet-estel.com/turn-key-complex-solutions/): * - optional
- [RECTIFIER FOR DIESEL LOCOMOTIVES](https://tet-estel.com/rectifier-for-diesel-locomotives/): Main characteristicsTechnical specifications
- [RECTIFIER-INVERTER FOR ELECTRIC LOCOMOTIVES](https://tet-estel.com/rectifier-inverter-for-electric-locomotives/): Main characteristicsTechnical specifications
- [TRACTION SUBSTATION INVERTER FOR MAINLINE RAILWAY](https://tet-estel.com/traction-substation-inverter-for-mainline-railway/): Main characteristicsTechnical specifications
- [TRACTION SUBSTATION RECTIFIER  FOR URBAN TRANSPORT](https://tet-estel.com/traction-substation-rectifier-for-urban-transport/): In the standard design the rectifier is assembled according to 12-pulse current rectification circuit formed by subsequent connection of two bridges. However, 6-pulse rectifier circuit is also possible. Natural cooling ensures high reliability and overload capacity, maintenance is not required in the course of operation. Use of a common heatsink on two parallel diodes is a block minimizes quantity of buses and transitional contacts leads to reduced losses. Assembly includes a custom-made clamping mechanism allowing quick replacement of diodes without the need of neither removing the power equipment nor using special tools.    
- [TRACTION SUBSTATION RECTIFIER  FOR MAINLINE RAILWAY](https://tet-estel.com/traction-substation-rectifier-for-mainline-railway/): Main characteristicsTechnical specifications
- [INDUCTION POWER UNIT FOR HEATING](https://tet-estel.com/induction-power-unit-for-heating/): The UIN-H package includes the following elements:
- [LOW FREQUENCY POWER SUPPLY FOR ESR FURNACE](https://tet-estel.com/low-frequency-power-supply-for-esr-furnace/): Main characteristicsTechnical specifications
- [NETWORK FREQUENCY POWER SUPPLY FOR ESR FURNACE](https://tet-estel.com/network-frequency-power-supply-for-esr-furnace/): TET ESTEL power supply units for ESR furnaces are designed to regulate power and stabilize alternating current flowing through a liquid slag layer. Industrial frequency power supplies are built on thyristor controllers consisting of antiparallel connected thyristors with pulse-phase control.
- [VAR FURNACE POWER SUPLY](https://tet-estel.com/var-furnace-power-suply/): Power supply units are designed for automatic adjustment of metal remelting procedure in open-type electric arc furnaces of with working volume up to 65 tons. Several versions of supply units of different power and voltage are available depending on furnace features.Use of water cooling and powerful new thyristors allows to minimize the power supply unit needed installation floor area.                            
- [DC OPEN-TYPE-EAF POWER SUPPLY](https://tet-estel.com/open-type-eaf-power-supply/): ARO series power supply units are designed for automatic control of the metal melting process in open-type DC electric arc furnaces with capacities up to 30 tons. Multiple power and voltage configurations are available to meet specific furnace requirements. Water cooling and high-performance thyristor technology minimize installation footprint.     
- [INDUCTION POWER UNIT FOR MELTING IN VACUUM OR OPEN TYPE FURNACES](https://tet-estel.com/induction-power-unit-for-melting-in-vacuum-or-open-type-furnaces/): Main characteristicsTechnical specifications
- [IGBT FREQUENCY CONVERTER](https://tet-estel.com/igbt-frequency-converter/): The FCI series frequency converter for induction heating is designed for electrothermal systems and can be used either as a standalone device in the melting, heating or hardening process or as an integrated device and a part of technological systems. The main difference from TFC is in the wider range of adjustment, smaller size and the ability to work at higher frequencies.
- [THYRISTOR FREQUENCY CONVERTERS](https://tet-estel.com/thyristor-frequency-converters/): The TFC series frequency converter for induction heating and metal- melting devices is designed to work in electrothermal heating systems and can be used as either a standalone device in the metal heating and melting process or as an integrated device as a part of technological systems. The main feature of thyristor converters is high reliability, wide power range and relatively high output voltage.
- [CABLE WINDING DEVICE](https://tet-estel.com/cable-winding-device/): Cable winding device CW is intended for the compact storage as well as for the winding and unwinding of power supply cable.
- [AUTOMATIC CABLE WINDING DEVICE](https://tet-estel.com/automatic-cable-winding-device/): Automatic cable winding device is operated using remote control panel or from diagnostics panel.
- [DISTRIBUTION COLUMN](https://tet-estel.com/distribution-column/): Airfield electric distribution column is intended for distribution and supplying stationary and mobile ground power units with electric power, during operational forms of aircrafts technical maintenance.
- [DIESEL POWERED GROUND POWER UNITS](https://tet-estel.com/diesel-powered-ground-power-units/): Main characteristicsTechnical specifications
- [BATTERY POWERED GROUND POWER UNITS](https://tet-estel.com/battery-powered-ground-power-units/): Main characteristicsTechnical specifications
- [MOBILE COMBINED GROUND POWER UNITS](https://tet-estel.com/mobile-combined-ground-power-units/): Main characteristicsTechnical specifications
- [STATIONARY COMBINED GROUND POWER UNITS](https://tet-estel.com/stationary-combined-ground-power-units/): Combined power unit FCA-90/AR-600A consists of frequency converter 400 Hz and 28 V rectifier. The unit is designed to supply aircafts and helicopters during preflight maintenance at the airport. It can also be used as a power unit of test benches, hangars and aircraft manufacturing plants.
- [MOBILE AIRCRAFT RECTIFIERS](https://tet-estel.com/mobile-aircraft-rectifiers/): Airport rectifiers are designed to supply aircrafts and helicopters during preflight maintenance at the airport.They can also be used as a power unit of test benches, hangars and aircraft manufacturing plants.AR is intended to supply all types of aircrafts and helicopters with 28,0 /28,5 V.Could be manufactured in a mobile and stationary versions.
- [STATIONARY AIRCRAFT RECTIFIERS](https://tet-estel.com/stationary-aircraft-rectifiers/): Airport rectifiers are designed to supply aircrafts and helicopters during preflight maintenance at the airport.
- [UNDER BRIDGE FREQUENCY CONVERTER](https://tet-estel.com/under-bridge-frequency-converter/): Consists of static frequency converter FCA-90H and automated cable winding device ACW-04.. Each device is functionally complete and can be joined with each other. 
- [MOBILE FREQUENCY CONVERTER](https://tet-estel.com/mobile-frequency-converter/): Main characteristicsTechnical specifications

## Pages
- [Portfolio](https://tet-estel.com/portfolio/): Rectifiers supplement for diesel-electric locomotives enginesSkinest Rail (Estonia)
- [Quality Control , Environmental, Health and Safety Policy](https://tet-estel.com/quality-control-environmental-health-and-safety-policy/): To lead the market by creating, improving and producing high-quality, reliable products that improve our customers' business efficiency, thereby ensuring the success and development of our company. We are committed to making a positive contribution to society and the environment.
- [Transport](https://tet-estel.com/transport-en/): TPRS Series
- [Careers](https://tet-estel.com/careers/): Engineering Design Department
- [Electric Drives](https://tet-estel.com/electric-drives/): ELECTRIC  DRIVES  0START OF DELIVERY 0+UNITS SUPPLIED 0+TYPES OF DEVICES Frequency  control  converters  for  soft  start  and  speed  regulation  of  synchronous  machines  and  asynchronous  motors  with  phase  rotor  HIGH  VOLTAGE  ELECTRIC  DRIVE  EQUIPMENT  HIGH-VOLTAGE FREQUENCY CONTROL CONVERTER FOR SYNCHRONOUS MOTORS CFS Series SOFT STARTER FOR ASYNCHRONOUS MOTORS WITH A PHASE ROTOR SSA Series
- [Shore-to-Ship Power Supply Frequency Converters — Cold Ironing Solutions](https://tet-estel.com/shore-to-ship-power-supply/): 0START OF DELIVERY
- [Electrothermal Equipment](https://tet-estel.com/electrothermal-equipment/): ELECTROTHERMAL  EQUIPMENT  0START OF DELIVERY 0+EQUIPMENT SOLD 0+NUMBER OF COUNTRIES TET ESTEL has been manufacturing frequency converters and equipment for induction heating technology since 1968, when the plant released the first thyristor frequency converter of the TFC series and began their serial production. In the late 1980s, the production of rectifiers and equipment for DC vacuum arc furnace (VAR) technologies began, and since 1998 - the production of DC rectifier units for open electric arc furnaces (EAF). Since 2000, the development of regulators for electroslag remelting furnaces (ESR) began. In 2006, transistor frequency converters of the FCI series on IGBT modules were developed and launched into serial production. Today the plant produces 6th generation thyristor frequency converters, IGBT-based transistor converters, induction heating complexes for heat treatment and melting, rectifier units for EAF and VAR furnaces and power regulators for ESR furnaces. FREQUENCY  CONVERTERS  THYRISTOR  FREQUENCY  CONVERTER  TFC Series IGBT  FREQUENCY  CONVERTER  FCI Series INDUCTION  HEATING  SYSTEMS  INDUCTION  POWER  UNIT  FOR  MELTING  IN  VACUUM  OR  OPEN  TYPE  FURNACES  UIN-M Series INDUCTION  POWER  UNIT  FOR  HEATING  BILLETS,  HEAT  TREATMENT  UIN-H Series RECTIFIER  UNITS  FOR  OPEN  AND  VACUUM  DC  ELECTRIC  ARC  FURNACES  OPEN-TYPE  ELECTRIC  ARC  FURNACE  (EAF)  POWER  SUPPLY  ARO Series VACUUM  ARC  REMELTING  (VAR)  FURNACE  POWER  SUPPLY  ARV Series ESR  REGULATORS  NETWORK  FREQUENCY  POWER  SUPPLY  FOR  ELECTRO  SLAG  REMELTING  FURNACE  SRG Series LOW-FREQUENCY  POWER  SUPPLY  FOR  ELECTRO  SLAG  REMELTING  FURNACE  SRL Series
- [Power Semiconductor Devices](https://tet-estel.com/power-semiconductor-devices/): POWER  SEMICONDUCTOR  DEVICES  0+YEARS OF EXPERIENCE 0 mln+UNITS SUPPLIED 0+TYPES OF DEVICES The range of power semiconductor devices produced by TET ESTEL differs from its analogues on market by not competitively prices only, but also by high level of quality, reliability and design. All TET ESTEL products are equipped with semiconductors of its own production or manufactured in cooperation with well-known European companies according to our specifications. THYRISTORS  THYRISTORS  TABLETS  THYRISTORS TABLETS THYRISTORS  STUDS  THYRISTORS STUDS DIODES  DIODES  TABLETS  DIODES TABLETS DIODES  STUD  DIODES STUD SUPPRESSORS  SUPPRESSOR  TABLETS  SUPPERSSON TABLETS SUPPRESSOR  STUD  SUPPERSSON STUD
- [Aviation – Ground Power Units and Frequency Converters](https://tet-estel.com/aviation-ground-power-units-and-frequency-converters/): eGPU
- [Contact us](https://tet-estel.com/contact-us/): Kuuli 6, Tallinn 13619, EstoniaContact our team
- [TET ESTEL](https://tet-estel.com/): Company profile