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Siemens to Supply Main Drives for Nippon Steel Plate Mill Upgrade
12/17/2007 - Siemens will supply a twin main drive for the new roughing train that will be added to Nippon Steel’s heavy plate rolling mill in Oita.
Nippon Steel Corp. (NSC) has awarded a contract to Siemens Industrial Solutions and Services Group (I&S) and its cooperation partner company, Fuji Electric Systems, to supply a new main drive for expansion of its heavy plate rolling mill in Oita.
Nippon Steel’s heavy plate rolling mill in Oita produces a maximum plate width of 5500 millimeters and is one of the largest and most productive mills in the world. Siemens had supplied DC drives for the existing rolling stand when the stand was installed in 1975. Siemens replaced the DC drives with AC drives in 1998 as part of a program for increasing the mill’s output.
For the current upgrade, an additional roughing train will be added to the heavy plate rolling mill will, which will expand the plant's capacity by 600,000 additional tonnes per year.
Siemens will supply a twin main drive with non-salient-pole synchronous motors. The drive has a speed of 40 rotations per minute and a rated power output of 8000 kilowatts. Power will be supplied via Sinamics SM150 three-point DC link converters connected in parallel. Siemens will also supervise the installation and commissioning of the drives.
Nippon Steel’s aim for the mill upgrade is to meet the customer needs for high-end steels. Commissioning is scheduled for March 2009.
Metals Technologies (MT), a division of the Siemens Industrial Solutions and Services (I&S) Group, is one of the world's leading engineering and plant-building companies for the iron and steel industry as well as for the flat-rolling sector of the aluminum industry and for open-cast mining. MT, which was created from the integration of Voest-Alpine Industrieanlagenbau, Linz/Austria, plus the electrical engineering product business and automation solutions of Siemens, provides a comprehensive range of supplies and services for all related technological processes and integrated automation solutions for the entire life-cycle of metallurgical plants.
The Siemens Industrial Solutions and Services Group (I&S) is the integrator of systems and solutions for industrial and infrastructure facilities and global service provider for the plant and projects business covering planning, installation, operation and the entire life cycle. In fiscal 2007 (to September 30) I&S employed a total of 37,000 people worldwide and achieved total sales of EUR 8.894 billion, according to U.S. GAAP.
