Star (Y) Connection
In star connection,the starting or finishing ends (Similar ends) of three coils are connected together to form the neutral point. A common wire is taken out from the neutral point which is called neutral.
There is a neutral or star point
3.Three phase four wire system is derived from star connection
4.Line current equal to phase current
5.Line voltage is √3 times of phase voltage
6.The speed of star connected motors are slow as they receive 1/√3 voltage
7.In star connection the phase voltage is low as 1/√3 of the line voltage so it needs low number of turns hence saving in copper
8.Low insulation required as phase voltage is low
9.In power transmission star connection system is general and typical to be used.