SR 400 MVA 400 kV Power Transformer (Synthetic Ester Oil) and 63 MVAr 21 kV Variable Shunt Reactor (VSR) Synthetic Ester Oil-Immersed 2026 Tender
Helen Electricity Network Ltd. (Helen Sähköverkko Oy)
In context
This is a contract notice published by a government body covering a mix of works, supplies and services. Delivery covers Finland (Europe). It is classified under Grid Modernization and Engineering and Infrastructure against the sustainability taxonomy rather than matched on keywords.
Helen Sähköverkko Oy is procuring a 400/400/125 MVA synthetic-ester power transformer and a 63 MVAr variable shunt reactor for a new 400 kV substation in Helsinki, delivered turnkey with transport, erection, testing and commissioning by 2030. It suits large specialist transformer and reactor manufacturers with heavy-equipment logistics and high-voltage installation capability, not small sustainability firms.
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About this tender
Helen Sähköverkko Oy is building new 400 kV substation in Sörnäinen, Helsinki Finland. Subject of the procurement is delivery of power transformer and VSR reactor for Helen Sähköverkko Oy. Intended delivery of power transformer and VSR reactor is year 2030. With this invitation to participate Helen Sähköverkko Oy is looking for capable and interested candidates to deliver the needed power transformer and VSR reactor. The delivery of power transformer and VSR reactor, including all needed transportation and erections, will be performed as turnkey deliveries. The transformer and VSR reactor deliveries will be separate from the substation construction project performed by other contractors, however, there is a need to coordinate the delivery with the construction work at site. Delivery of 400 / 400 / 125 MVA, 410 ± 6 x 1,33 % / 120 / 21 kV power transformer (Synthetic Ester Oil), equipped with on-load tap-changer, including: - Manufacturing of transformer with fittings and accessories - Testing - All necessary logistics e.g. - Sea transportation to Finland - Loading and unloading on the railway cart - Loading and unloading on road truck and transport to the site - Supplier may choose the means and route of transportation - All organizational work needed for logistics: arrangement of transportation from factory to site, customs clearance and forwarding - Unloading on the foundation - Erection, testing and commissioning at site. Delivery of 63 MVAr 21 kV Variable Shunt Reactor (VSR) Synthetic Ester Oil-Immersed including: - Manufacturing of reactor with fittings and accessories - Testing - All necessary logistics e.g. - Sea transportation to Finland - Loading and unloading on the railway cart - Loading and unloading on road truck and transport to the site - Supplier may choose the means and route of transportation - All organizational work needed for logistics: arrangement of transportation from factory to site, customs clearance and forwarding - Unloading on the foundation - Erection, testing and commissioning at site.
Key requirements
- ✓Manufacture, testing and supply of 400 MVA 400 kV power transformer with on-load tap-changer and synthetic ester oil
- ✓Supply of 63 MVAr 21 kV variable shunt reactor with synthetic ester oil
- ✓Turnkey logistics incl. sea freight, rail/road transport to site, customs, unloading and foundation placement
- ✓Site erection, testing and commissioning, coordinated with separate substation construction works
- ✓Delivery targeted for 2030
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About this sector
Grid modernisation covers transmission, distribution, smart meters, interconnectors and the software that balances a network with more variable supply. Funding comes as innovation calls for network operators and suppliers as well as large public tenders for equipment and works. Applicants are usually asked to show technical readiness and experience working with regulated network companies.
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