Transformers
Our strength, and at the same time our competitive advantage, is the comprehensive execution of projects related to the repair, installation, and relocation of various power transformers.
- Repair of 6-330 (400) kV power transformers
- Montage of new 6-330 (400) kV power transformers
- Transport and relocation of 35-330 kV power transformers
- Repair and maintenance of 0.4-20 kV substations
Equipment
Energoservis has an extensive equipment fleet to ensure the successful execution of projects, enabling us to perform high-voltage work of very different levels of complexity. Our equipment includes, among other things:
- Transformer oil degassing units MAS6000, MAS2000 and URM-1000
- Vacuum unit GPV2E500
- Transformer oil heating unit with a capacity of 70 kW
- Oil pumps with various capacities
- Vacuum- and oil-resistant hoses
- Oil tanks of various volumes
- Hydraulic jacks with a control console for lifting and horizontally moving transformers weighing up to 150 tons
- A lifting device with a work basket mounted on a 6.5-ton truck
Wind Energy Projects
Since 2009, we have carried out transformer repair works for wind generators at their installation locations in Estonia, Finland, and Sweden. Our primary area of expertise in this field is the repair of wind turbine transformers, in which we have skills and experience that are unique in the Estonian market.
Solar Energy Projects
The company’s ambition is to enter the market for implementing various solar energy projects — work in this direction is ongoing.
Our Working Process
Consultation
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Proposal
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Installation
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Inspection
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References
Estonia
● Major overhaul of Sindi autotransformer A1T (330 kV, 125 MVA, ZTR)
● Assembly of Tartu autotransformers A1T and A2T (330 kV, 200 MVA, CG Global)
● Assembly of Aruküla autotransformers A1T and A2T (330 kV, 200 MVA, Chint)
● Assembly of Paide autotransformer A2T (330 kV, 200 MVA, ABB)
● Installation of the Estlink-1 submarine cable autotransformer (330 kV, 400 MVA, ABB)
● Installation of Harku A1T autotransformer (330 kV, 200 MVA, CG Global)
● Installation of Kiisa AREJ autotransformer 3× (330 kV, 73 MVA, Hyundai)
● Installation of Sindi autotransformer (330 kV, 200 MVA, ABB)
● Installation and assembly of Balti A2T 200 MVA 330 kV transformer, BEST, 2016
● Installation and assembly of Sindi A2T 200 MVA 330 kV transformer; dismantling, tank entry, reinstallation and assembly, BEST, 2020–2021
● Installation and assembly of Püssi A4T 200 MVA 330 kV transformer, BEST, 2022
● Installation and assembly of Paide 120 MVAR 330 kV shunt reactor; dismantling, active part lifting, reinstallation and assembly, BEST, 2022
● Assembly of Purtse substation 50 MVA 347 kV transformer, GANZ, 2022
● Installation and assembly of Balti A1T 200 MVA 330 kV transformer, BEST, 2023
● Installation and assembly of Sopi substation 4 × 100 MVA 347/33 kV transformers, BEST, 2023
● Assembly of Kiisa, Püssi and Viru substations 50 MVA 347/15 kV transformers, Siemens Energy, 2023–2024
● Installation and assembly of Kiisa and Tartu 200 MVA 330 kV reserve transformers, BEST, 2024
● Installation and assembly of Lihula A1T and A2T 200 MVA 330 kV transformers and 120 MVAR 330 kV shunt reactor, BEST, 2024–2025
● Installation and assembly of Balti and Mustvee 120 MVAR 330 kV shunt reactors, BEST, 2024–2025
● Installation and assembly of HERTZ1 115 MVA 347/33 kV transformer, ASTOR, 2025
Latvia
● Assembly of Riga TEC-2 autotransformer (330 kV, 380 MVA, ZTR)
● Major overhaul of Valmiera autotransformers ATR-1 and ATR-2 (330 kV, 125 MVA, ZTR)
Finland
● Assembly of Yllikkäla autotransformer TR-1 (400 kV, 400 MVA, Siemens)
● Assembly of Kangasala 400 MVA 400 kV transformer (Siemens)
● Assembly of three Porvoo 40 MVA 110/10 kV power transformers (Siemens)
● Assembly of Mäntsälä 25 MVA 110/20 kV power transformer (Siemens)
● Assembly of Lavianvuori substation 400 MVA / 400 kV power transformer (Siemens)
In addition to the above, we also have experience with power transformers from the following manufacturers: Končar (Croatia), SGB (Germany), VA Tech EBG (Austria), Xi’an (China), GBE (Italy), ETRA KOLEKTOR (Slovenia), BEST (Turkey), ABB/Hitachi (Finland, Poland, Italy), Trioni (Italy), KPT Siemens Energy (Croatia), Siemens (Germany), Astor (Turkey), Ganz (Czech Republic), Chint (China), Pauwels (Belgium) and Hyundai (Bulgaria).