Basic circuit theory - neutral

thankyou to all who have replied, as its helping me to understand what happens in an electrical circuit.
 
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Of course, it gets even more confusing when you start getting into earthing, and the fact that neutral is tied to the earth at various points back to the substation.

Earth is basically a return path for the electrons. Tall metal electricity pylons carry three phases. Nothing else. ;)
 
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jujubean said:
The size of the voltage will vary from 0 to its maximum (325v) for half a second and 0 to the second maximum (-325v) for the second half of the second

not strictly true..

the voltage goes from 0, through 325 and back to 0 in the first half second, and then from 0, through -325 and back to 0 in the second half second ( based on the 1Hz frequency you were explaining on.. )

this is roughly what happens at the star point of a 3 phase transformer..

3-phase_flow.gif


http://en.wikipedia.org/wiki/Three-phase_electric_power
 
jujubean said:
The size of the voltage will vary from 0 to its maximum (325v) for half a second and 0 to the second maximum (-325v) for the second half of the second

not strictly true..

the voltage goes from 0, through 325 and back to 0 in the first half second, and then from 0, through -325 and back to 0 in the second half second ( based on the 1Hz frequency you were explaining on.. )

this is roughly what happens at the star point of a 3 phase transformer..

3-phase_flow.gif


http://en.wikipedia.org/wiki/Three-phase_electric_power
Yes quite right What I actually wrote was for a quarter of a one second cycle...I did mean 0 to 0 which is the half second
Appologies
 

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