Transformer Works
Our strength and competitive edge is the complete execution of projects related to the repair, assembly and relocation of various power transformers and substation repair and maintenance work.
- Repair of 6–330 (400) kV power transformers
- Installation of new 6–330 (400) kV power transformers
- Transportation and relocation of 35–330 kV power transformers
- Repair and maintenance of 0.4–20 kV substations
Equipment Fleet
Energoservis operates an extensive equipment fleet that enables the execution of high-voltage works of varying complexity. Our equipment includes, among others:
- Transformer oil degassing units MAS6000, MAS2000, and URM-1000
- Vacuum unit GPV2E500
- Oil pumps with varying capacities
- Vacuum- and oil-resistant hoses
- Oil tanks of various capacities
- Hydraulic jacks with control units for lifting and horizontal movement of transformers weighing up to 150 tons
- A lifting device mounted on a 6.5 t truck
Wind Energy Projects
Since 2009, we have carried out numerous wind turbine transformer repair works at installation sites in Estonia, Finland, and Sweden. Our core competence in this field is the repair of wind turbine transformers, where we possess expertise and experience that is unique in Estonia
Solar Energy Projects
The company’s ambition is to enter the solar energy project market. Active development work in this direction is currently underway
Our Working Process
Consultation
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Proposal
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Installation
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Inspection
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Completed Projects
Estonia
● Sindi autotransformer A1T (330 kV, 125 MVA, ZTR) major overhaul
● Installation of Tartu autotransformers A1T and A2T (330 kV, 200 MVA, CG Global)
● Installation of Aruküla autotransformers A1T and A2T (330 kV, 200 MVA, Chint)
● Installation 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 3* autotransformer (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, dismantling, internal inspection, reinstallation and reassembly of Sindi A2T 200 MVA 330 kV transformer, BEST, 2020-2021
● Installation and assembly of Püssi A4T 200 MVA 330 kV transformer, BEST, 2022
● Installation and assembly, dismantling, active part lifting, reinstallation and reassembly of Paide 120 MVAR 330 kV shunt reactor, BEST, 2022
● Assembly of Purtse TP 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 TP 4 100 MVA 347/33 kV transformers, BEST, 2023
● Assembly of Kiisa, Püssi and Viru SK 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
● Installation 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
● Installation of Yllikkäla autotransformer TR-1 (400 kV, 400 MVA, Siemens)
● Installation of Kangasala 400 MVA 400 kV transformer (Siemens)
● Installation of three 40 MVA 110/10 kV power transformers in Porvoo (Siemens)
● Installation of a 25 MVA 110/20 kV power transformer in Mäntsälä (Siemens)
● Installation of a 400 MVA / 400 kV power transformer at Lavianvuori substation (Siemens)
In addition to the above-mentioned projects, we also have experience working with power transformers manufactured by Končar (Croatia), SGB (Germany), VA Tech EBG (Austria), Xi'an (China), GBE (Italy), ETRA KOLEKTOR (Slovenia), BEST (Turkey), ABB/Hitachi (Finland, Poland, Italy), TRIOONI (Italy), KPT SIEMENS Energy (Croatia), SIEMENS (Germany), ASTOR (Turkey), GANZ (Czech Republic), CHINT (China), PAUWELS (Belgium) and HYUNDAI (Bulgaria).