1045 Hickory Street Pewaukee, WI 53072 www.cooperpower.com News Release Contact: Stephen Weinstein 262-691-8241 stephen.weinstein@cooperindustries.com Cooper Power Systems Helps We Energies Provide Power Agreement represents “Energy Delivery Reinvented” electrical and financial commitment to region. WAUKESHA, WI, March 11, 2010 - Cooper Power Systems, a division of Cooper Industries, Ltd. (NYSE: CBE), today announced that it signed a contract to supply We Energies with a large majority of the Wisconsin-based utility’s electrical transformer product needs through 2014. Terms of the agreement were not disclosed. “This agreement represents joint financial commitments from two major Wisconsin-based employers to help advance the economy of the state,” said Cooper Power Systems group president, Mike Stoessl. “It’s a reflection of our efforts to work with We Energies to live up to our corporate commitment of “Energy Delivery Reinvented,” to keep up with the electrical demands of the region, and to shape our new energy economy.” Stoessl said that the agreement to supply We Energies with single-phase pole-mounted transformers, single-phase pad-mounted transformers, and, three-phase pad-mounted transformers is “not only good for our business, but special for our employees, many of whom are We Energies customers.” Cooper Power Systems employs nearly 2,200 people at facilities throughout Southeastern Wisconsin. We Energies has approximately 4,800 employees throughout its Southeastern Wisconsin and Upper Michigan service area. -More- Cooper Power Systems – Page 2 “This agreement represents one of the many ways We Energies is providing more reliable electric power to our customers, strengthening the electrical energy infrastructure in Wisconsin, reducing our dependency on expensive imported power and continuing to improve the environment,” said Tom Wick, director - Electric Distribution Asset Management for We Energies. “We are proud to provide reliable energy for Wisconsin’s growing economy using Wisconsin manufactured equipment.” Editor’s Note: For additional information, contact Lauren Ban at (412) 394-6611 or lauren.ban@bm.com. About We Energies We Energies serves more than 1.1 million electric customers in Wisconsin and Michigan’s Upper Peninsula and more than 1 million natural gas customers in Wisconsin. Our electricity prices are well below the national average. We Energies is the trade name of Wisconsin Electric Power Company and Wisconsin Gas LLC, the principal utility subsidiaries of Wisconsin Energy Corporation (NYSE: WEC). Visit the We Energies Web site at www.we-energies.com. Learn more about Wisconsin Energy Corporation by visiting www.wisconsinenergy.com. About Cooper Power Systems Cooper Power Systems, Inc., with 2009 revenues of approximately $1.1 billion, is a division of Cooper Industries plc (NYSE: CBE). Cooper Power Systems is a global manufacturer of world-class power delivery and reliability solutions for the electrical and industrial markets. Through its Energy Automation Solutions group, it is also a leading provider of software, communications and integration solutions that enable customers to increase productivity, improve system reliability, and reduce costs. For more information, please visit www.cooperpower.com or cooperpowereas.com. About Cooper Industries Cooper Industries plc (NYSE: CBE) is a global manufacturer with 2009 revenues of $5.1 billion, approximately eighty-nine percent of which are from electrical products. Founded in 1833, Cooper's sustained level of success is attributable to a constant focus on innovation, evolving business practices while maintaining the highest ethical standards, and meeting customer needs. The Company has eight operating divisions with leading market share positions and world-class products and brands including: Bussmann electrical and electronic fuses; Crouse-Hinds and CEAG explosionproof electrical equipment; Halo and Metalux lighting fixtures; and Kyle and McGraw-Edison power systems products. With this broad range of products, Cooper is uniquely positioned for several longterm growth trends including the global infrastructure build-out, the need to improve the reliability and productivity of the electric grid, the demand for higher energy-efficient products and the need for improved electrical safety. In 2009, sixty-one percent of total sales were to customers in the industrial and utility end-markets and thirty-nine percent of total sales were to customers outside the United States. Cooper has manufacturing facilities in 23 countries as of 2009. For more information, visit the website at www.cooperindustries.com. ### 2