Reply to 1 and 2: 

We will send you the VFD to your factory on or before 31-Dec-12. So, we can be able to test the SPDU at actual rpm. Note: We will program the VFD to run at 60 Hz before we send it to your factory. We request you to arrange the 50 Hz motors for both SPDU’s. 

Reply to 3: 

Please fabricate temporary adapter to suit 50 Hz motor, which can be removed after testing. 

Please call me if you have any doubts. 