circuit diagram of a 415v 3-phase automatic phase changer

[taoheed]

Hi guys,
My absolute regards to all members of EZdisscuss.I am a student of univesity of Iloin,Kwara state in Nigeria.I need the assistance of all member on the above topic for my project. kindly send the circuit diagram and any useful information concerning this topic.The working principle of the circuit is that when there is a power failure in any of the 3 phases,supply will just switch to the phase from other phases immediately,each phase having 240volts supply.Please kindly help me out.Happy new year to u all.Thanks

[richa singh]

hey can any 1 plzz help me wid automatic phase changer all what is given in electronics 4 u is not feasilble as i m told plzzz help