Efficient Copper Conductors for High-Performance and Safe Power Transmission
Modern transmission and distribution networks require high-performance transformers capable of safely transmitting large amounts of energy, meeting the highest efficiency standards, and operating reliably for decades.
To meet these demands, ASTA delivers high-performance Continuously Transposed Conductors (CTCs) that make mid- to high-voltage transformers more efficient, compact, and durable.
CTC – Efficiency & Stability for High-Performance Transformers
Continuously Transposed Conductors (CTCs) form the core of modern power and distribution transformers. They minimize losses, enhance thermal stability, and enable compact winding designs with maximum electrical and mechanical load capacity.
Backed by decades of experience and a fully integrated manufacturing process, ASTA is among the world’s leading suppliers of CTC solutions—covering everything from chemical development and wire forming to enameling and final transposition.
As a one-stop shop, ASTA offers a fully integrated CTC value chain – from chemical development and wire forming to enameling and final transposition – delivering CTC solutions with exceptional technological depth.
Benchmark copper flat conductor geometries and tight tolerances, combined with ultra-thin enamel insulation and proprietary chemical developments such as ASTA Epoxy, as well as ASTA’s own transposition technology, enable extremely compact transformer designs. These designs meet the highest electrical and mechanical requirements while sustainably reducing transmission losses and ensuring reliable operation over decades.
2 GW Offshore Grid Access Projects
The 2 GW offshore grid access projects in the North Sea and Baltic Sea are standardized HVDC platform solutions designed to transmit large volumes of renewable energy safely, efficiently, and reliably to shore. The solution is deployed repeatedly by multiple European transmission system operators and will be implemented across numerous projects over the next 5–10 years.
ASTA supplies specialized copper-based winding materials for the HVDC transformers used in these platforms and has been selected for every project awarded to date.
Customers: GE Vernova, Hitachi Energy, Siemens Energy
Region: North Sea & Baltic Sea
Implementation: Ongoing
Adriatic Link
Asta supplies the drilling conductors for six transformers using Siemens Energy HVDC Plus technology. Power transmission is carried out via two parallel subsea cables, each with a capacity of 500 MW.
Customer: Siemens Energy
Implementation period: 2021–2025
Italy
Dogger Bank
The Dogger Bank offshore wind farm is the world’s largest offshore wind energy project north of Great Britain. Once completed, it will generate 3.6 gigawatts of electricity, supplying renewable energy to around 6 million households.
Asta develops components for the offshore and onshore transformers by Hitachi Energy, enabling the bundled electricity to be transmitted to shore over distances of up to 130 kilometers with minimal losses.
Customer: Hitachi Energy
Implementation period: ongoing
Great Britain
SüdLink
Power Highway for the Energy Transition
As one of Europe’s first power highways, SüdLink transports green electricity from northern Germany to the country’s industrial south via a high-voltage direct current transmission line spanning around 700 kilometers.
ASTA supplies components for the converter stations along the route, where up to two gigawatts of direct current are converted into alternating current, providing sustainable energy for up to 10 million households.
Customer: SIEMENS Energy
Implementation period: ongoing
Germany
Wind Farm Rio Grande do Norte
Asta develops, manufactures, and supplies special high-current copper busbars in cooperation with WEG.
Customer: WEG
Implementation period: 2021–2025
Brazil
World's Largest Transformer
Asta supplies Continuously Transposed Conductors (CTCs) for the ±1,100 kV transformer, which is installed in China’s largest HVDC project and transmits 12 GW of power over 3,324 km from western to eastern China.
Customer: Siemens Energy
Implementation period: 2018
Location: China