Germany: Hitachi Energy has delivered its first power transformer using low-carbon copper to TenneT Germany as part of a framework agreement signed in 2023. The 380 MVA transformer was produced at the company’s Bad Honnef factory and installed at a substation in Hardebek near Hamburg.
All transformers covered by the agreement will use low-carbon copper conductors, helping TenneT Germany move forward with its climate goals. The transmission system operator plans to cut carbon emissions by 30 % by 2030 compared to 2019 levels.
According to Hitachi Energy, the use of low-carbon copper lowers embedded carbon emissions in transformer materials by 18 %. Across all units included in the agreement, the estimated reduction is expected to reach around 9,500 metric tons of carbon emissions.
Copper plays a key role in transformers because of its excellent electrical and thermal conductivity. It is mainly used in windings, where it helps maintain safe operating temperatures and improves transformer reliability and lifespan. However, copper mining and processing require significant resources, making it one of the main contributors to the environmental footprint of transformers.
“As we strive toward net-zero, it is important to embrace innovative collaboration and partnerships, and to engage the entire value chain to achieve the scale and pace needed to decarbonise energy systems,” said Norbert Beatrix, Hub Manager Europe, Transformers Business Unit, Hitachi Energy.
Dr. Florian Dotzler, Director Supply Chain Management, TenneT Germany said: “Our ambition is to advance economically viable, cost-efficient solutions that make sustainable materials the new standard, one of the greatest challenges we currently face in supply chain management.”
Source: Hitachi Energy
