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What is the speed range for ATV900 drives.

Following are the Speed Range for ATV900
1-100 in open loop Asynchronous law   
1-50 in open loop Synchronous law                                                                                            
1-1000 in closed loop.    
 
Example; For a 50Hz motor:
Speed range 1-100 means the drive is able to give the nominal torque between 0.5Hz to 50Hz.
Speed range 1-50 means the drive is able to give the nominal torque between 1Hz to 50Hz.
Speed range 1-1000 means the drive is able to give the nominal torque between 0.05Hz to 50Hz.
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