Renewable Energy Conferences.com | Renewable Energy Events, Conferences, Exhibitions, Training and Seminars: Siemens Creates Global 60-Hertz Turbine Hub in the U.S. Siemens Creates Global 60-Hertz Turbine Hub in the U.S. ================================================================================ REC.com on 12/03/2010 14:50:00 Expanded site in Charlotte will employ nearly 1,800 people by 2014