This contract worth around 5 million euros covers the supply of cooling devices designed to protect the converters used for the transmission of the electricity generated by the offshore wind farms in the North Sea via sub-aquatic cables and the connection to onshore power grids.

Mersen is announcing the signature of a contract with Siemens Energy in connection with the European

project to develop green energy sources in the North Sea. This contract worth around 5 million euros
covers the supply of cooling devices designed to protect the converters used for the transmission of the
electricity generated by the offshore wind farms in the North Sea via sub-aquatic cables and the
connection to onshore power grids. Delivery is scheduled to take place between 2012 and 2013.

Based on HVDC technology for high-voltage power transmission and distribution, the systems developed
by Siemens Energy can be used for extremely high power transmission over very long distances and
provide a trusted method to connect asynchronous grids or grids of different frequencies, while reducing
losses.

Mersen's customized cooling devices were chosen because they satisfy the requirement of flawless
reliability for this advanced technology equipment, which is used in highly exacting environments and
conditions.

This project provides further evidence of the pertinence of the Group's strategy of being a key player in
the renewable energies market and a leading force in power electronics.