Having discussed four regions/countries in the eastern hemisphere where 19 of the projects are located, we turn to the opposite side of the world for the remaining project. One World Trade Center Tower (see Figure 13), in New York, is set to become the tallest building in the western hemisphere in 2013.
There is no difference. 'Star' and 'wye' are alternative names for the same connection. Similarly, 'delta' and 'mesh' are alternative names for the same connection.plit and merge into it. Answer by Awaygood. Confidence votes 22.5K. There is no difference. A three-phase ' star ' connection is simply another name for a ' wye ' connection. 'Star' seems to be the preferred name in Britain, whereas, 'wye' seems to be the preferred name in North America-although this is debatable.
In a wye system, the supply service line-to-line voltage is 1.73 times the voltage from any phase to neutral. Delta power is used for motors, 3-phase heaters, anywhere you don't need a neutral. The biggest use of delta is in power transmission.he neutral is grounded at the service entrance. Wye systems must be used where you have single phase loads that you must feed. Interestingly, if you hide the neutral, you really can't tell the difference between star and delta systems. The phase-to-phase voltage is exactly the same.