Transmission Voltages...
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Welcome to the Forum Haaku .
The National Grid transmission is indeed a 3 phase system .
How you figure it out ...I can't help with .
The National Grid transmission is indeed a 3 phase system .
How you figure it out ...I can't help with .
Thank you for your response, though sorry i think i wasn't very clear with my question or did you mean that voltages of three phase systems are always given as phase to phase?
Let's say we have a power line with phase to ground voltage of 220V, then a phase to phase voltage for this line would be 220V*1.73=380V. If 110kV is phase to ground(but i don't know if it is) then phase to phase would be 110kV*1.73=190kV if it's phase to phase then phase to ground would be 110kV/1.73=63kV. So i want to know if this 110kV means phase to ground or phase to phase, because it makes a huge difference in calculations
. Thank you.
Let's say we have a power line with phase to ground voltage of 220V, then a phase to phase voltage for this line would be 220V*1.73=380V. If 110kV is phase to ground(but i don't know if it is) then phase to phase would be 110kV*1.73=190kV if it's phase to phase then phase to ground would be 110kV/1.73=63kV. So i want to know if this 110kV means phase to ground or phase to phase, because it makes a huge difference in calculations
. Thank you.
Its phase to phase mate . But I think theres only one person on here who works at voltages above 415V . Why do you need to know about the grid ?
I notice you describe Earth as Ground , why would you do that . ?
I notice you describe Earth as Ground , why would you do that . ?
and there was me thinking that 3 phase voltages were measured phase to phase
Well this "earth as ground" thing is probably because I have been reading mainly American literature though i'm neither American nor British I asked this question because i study (at a college) electrical engineering (high voltage systems - generation, transmission, distribution and so on). And as funny as it sounds i wasn't sure which voltage is given by default. Anyways, problem solved. Thank you for your responses.
I asked this question because i study (at a college) electrical engineering (high voltage systems - generation, transmission, distribution and so on). And as funny as it sounds i wasn't sure which voltage is given by default. Anyways, problem solved. Thank you for your responses.
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There's a clue. Look at any high voltage transmission line. How many conductors do you see?
Yes three. There's no neutral. Delta wound transformer at each end so there is no star point, so it must be phase to phase voltage.
Yes three. There's no neutral. Delta wound transformer at each end so there is no star point, so it must be phase to phase voltage.
as above, there is no neutral / star point
The voltage of any electrical network is generally given as the highest voltage between any of the conductors. This would apply to HV, MV AND LV.
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