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1. List three direct-drive (no gearbox) wind turbines with power rating greater than 1000 kW? Include manufacturer name, product name, power/voltage rating and generator type 2. For the wind turbines rated 3000 kW or higher, what types of generators are used? 3. List two medium voltage wind turbines rated 3000 kW or higher? Include product name, generator type and voltage level. 4. For the wind turbines rated 3000 kW or higher, what is the range for the cut-in wind speed, cut- out wind speed, and rated wind speed? 5. For the wind turbines rated 3000 kW or higher, what are the minimum and maximum hub heights used? 6. For wind turbines rated 3000 kW or higher, what are the minimum and maximum gear ratios used? 7. For the wind turbines rated 3000 kW or higher, what are the most popular gear box constructions and steps used?

engineering   Electrical-Engineering   
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