# Line voltages

1. May 31, 2004

### louie

If I'm considering a 3 phase line (25kV line-to-line voltage) that comes to a point and splits into single phase lines, what is the line voltage of one of the single phase lines ?

Does it remain 25 kV or is it 14.4 kV because you're only dealing with 1 phase and a neutral now ?

Any explanation would be great

Louie

2. Jun 1, 2004

### wwtog

Normally, they do not distribute L-N = Vl/sqrt(3)=14.4kV, only L-L =25kV. The phases can split AB, BC, CA. The single phase transformers convert 25K--> user voltage with the ground reference applied at the secondary neutral.

3. Jun 28, 2004

### anggoro_nuswantoro

A single phase line by definition is a circuit with only one phase. So you need a neutral side to create a loop. The voltage differential between the line and the neutral is, of course, +/- 14.4 kV and not 25 kV.

If you use both line (AB, AC, or BC) ..... I don't think that a single phase line. It may be within the category of two phase line :-)

aaNg

4. Jun 28, 2004