Question { Tanfac, 39056 }

Three phase alternators are connected in star connection
why?

Answer

in a star connection, phase voltage Vph = VL/ (3)^1/2.
1--Since the induced emf in the primary winding of an alternator is directly proportional to the number of turns, a star connected alternator will require less number of turns than a delta connected alternator for the same voltage.

2-- it also requires less insulation bcz its phase is less.

3-- it also help to reduce third harmonic ...