Hi steve..
Thanks for the prompt advice.i'll be checking out with the manufacturer
for the concerns..but in my case it would just be a change from 60hz
to 50hz with the operating voltage remaining the same i.e. 220v
i would be installing these in india.Where the supply is 220v,50hz.
i would also be using similar kind of motors.(15,10 hp).Do think
overheating will not be significant in my case.