if it was the other way about, supply lower than motor rating you could run it direct on-line the as a delta, and it will give you the star torque - i.e. about 1/2 to 2/3 of the plated torque.
However, in your case, where the supply is more than the motor needs, wire it permanently in star (i,e, for 230V accross each winding) and use a VSD (or switched resistors if you are feeling cheap) to provide a soft start function. Do not connect it delta - if the windings see 400V its life will be short and hot.
if it was the other way about, supply lower than motor rating you could run it direct on-line the as a delta, and it will give you the star torque - i.e. about 1/2 to 2/3 of the plated torque.
However, in your case, where the supply is more than the motor needs, wire it permanently in star (i,e, for 230V accross each winding) and use a VSD (or switched resistors if you are feeling cheap) to provide a soft start function. Do not connect it delta - if the windings see 400V its life will be short and hot.
