Voltage for 3 pahse systems

[Moshe Valdman]

     Hello everyone,
     
     Sorry, I asked this several days ago and got no response, so maybe the 
     email just didn't come through.
     
     Would anyone know what are the voltages/frequencies used in the 
     various countries/environments around the world for high power 
     industrial 3 phase equipment?
     
     thanks
     moshe valdman