3 phase Motor connection, 230V delta or 400V star?
Now the question is, how can I connect the motor to delta connection if I have only 400V line to line voltage? 


Wire the motor in star and connect it to your 400 V phase-to-phase supply.


  Where can I get 230 V line to line? 


You can't.


  Will I damage the motor in delta connection? 


Yes. You would be applying 400 V to a winding rated for 230 V.


  Is delta configuration only meant to be using with VFD in that case?


No. It is meant for a 230 V phase-to-phase supply.