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Siemens to build a shore power supply system for ships in Cuxhaven

Rotra Vente in the harbor of Esbjerg

The Cuxhaven shore power plant is designed for so-called ro-ro ships. Ro-ro (roll-on/roll-off) ships transport moving goods using the ro-ro process, which means that the cargo is driven onto the ship. The plant consists of a transformer station and a cable feed system with a mobile transfer device to the ship. The 20 kV/50 Hz voltage supplied from the public grid is converted to the necessary 440 V/60 Hz voltage in the transformer station. Siemens will use a low-voltage converter with a power output of 630 kW for the first time in a shore power connection. The inverter, combined with the control software, adapts the frequency of the local distribution grid to that of the ship electrical system. For frequency conversion, 50 Hertz three-phase current is always converted to 60 Hertz. The scope of supply also includes two transformers. A converter transformer is used to connect the system to the supply grid. The transformer on board the ship ensures electrical isolation between the ship and shore grids. The order also includes the installation of an 8DJH medium-voltage switchgear as well as the Sivacon S8 low-voltage main distribution system.
One of the main causes of local air pollution in ports is the combustion of ship fuels for generating electricity during the lay time. Reducing harmful emissions due to shipping is a major concern in port cities around the world. The construction of the shore power plant establishes important conditions for significantly reducing the emission of air pollutants, such as nitrogen and sulfur oxides and fine dust as well as carbon dioxide. The system will also greatly lower noise emissions, and both local residents as well as the ship's crew will benefit from the new shore power plant.
For further information on Division Energy Management, please see
For further information on shore power supply system, please see
Siemens AG (Berlin and Munich) is a global technology powerhouse that has stood for engineering excellence, innovation, quality, reliability and internationality for 170 years. The company is active around the globe, focusing on the areas of electrification, automation and digitalization. One of the world's largest producers of energy-efficient, resource-saving technologies, Siemens is a leading supplier of efficient power generation and power transmission solutions and a pioneer in infrastructure solutions as well as automation, drive and software solutions for industry. The company is also a leading provider of medical imaging equipment – such as computed tomography and magnetic resonance imaging systems – and a leader in laboratory diagnostics as well as clinical IT. In fiscal 2017, which ended on September 30, 2017, Siemens generated revenue of €83.0 billion and net income of €6.2 billion. At the end of September 2017, the company had around 372,000 employees worldwide. Further information is available on the Internet at
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Heiko Jahr

Siemens AG

Freyeslebenstr. 1
91058 Erlangen

+49 (9131) 7-29575