On Tue, 17 Apr 2012 11:08:13 +0100, The Natural Philosopher
wrote:

The Other Mike wrote:
On Tue, 17 Apr 2012 10:47:57 +0100, The Natural Philosopher
wrote:

all catenaries are, I am sure.

Most two conductor per phase installations or refurbishments at 275kV
and 400kV in the UK will be all aluminum.


must be some kind of better alloy then.

It is


All of the conductors types used in the UK are listed here (from "II.2
QUANTITY OR SCOPE OF THE CONTRACT" onwards)

Araucaria, Sorbus and Redwood are the types most commonly used

http://england.unitedkingdom-tenders...C_2011_Warwick


A route alignment drawing of a line in Norfolk showing conductor type,
sizes, sagging and tension

http://www.nationalgrid.com/NR/rdonl...Newheight1.pdf

Planning document for a replacement of a 275kV route with a 400kV
route in the North East, Page 75. mention of AAAC and conductor sizes.

http://www2.sedgefield.gov.uk/planni...php?File=20582



--

On Tue, 17 Apr 2012 10:46:58 +0100, The Natural Philosopher wrote:

Friends of the Earth Cymru director Gareth Clubb "We know that
shale
gas is a lot more emissions intensive than the use of conventional
gas, for example. And in many cases it would come in only slightly
better than coal, or in some places worse than coal."

Any one know what that means or the science it is based on?

what makes you think anything FoE say is based on science?

Nothing at all. I certainly don't take what FoE say at face value
hence asking the question.

I don't know how "clean" shale gas is compared to say north sea gas,
it may have a significantly different composition. Just like crude
oil varies depending on which hole in the ground you get it from.

--
Cheers
Dave.

On Tue, 17 Apr 2012 10:45:59 +0100, The Natural Philosopher wrote:

That depends how big the earthquakes it releases are. Two on the
flyde coast, felt on the surface, have been directly attributed
to
fracking in that area.

What magnitude were these?

not a lot and of course 'directly related' means some bearded weirdie
with shares in a solar panel firm says so.

Not in this case, even the firm involved in the fracking says it was
down to them:

From http://www.bbc.co.uk/news/science-environment-17726538

"The panel agrees with a Cuadrilla report from late last year that
test fracks at the company's Preese Hall site did cause two
earthquakes of Magnitudes 2.3 and 1.5 in April and May."

The panel being Prof Styles, Dr Baptie and Dr Chris Green and their
biographies and report for DECC is linked
from:

http://og.decc.gov.uk/en/olgs/cms/ex.../cuadrilla_dec
c/cuadrilla_decc.aspx

--
Cheers
Dave.

The Other Mike wrote:

On Tue, 17 Apr 2012 10:47:57 +0100, The Natural Philosopher
wrote:

all catenaries are, I am sure.

Most two conductor per phase installations or refurbishments at 275kV
and 400kV in the UK will be all aluminum.



Interesting - wonder if its a (new) alloy? If regular ali works, I would
have thought they'd have done it decades ago?
--
Tim Watts

Dave Liquorice wrote:
On Tue, 17 Apr 2012 10:46:58 +0100, The Natural Philosopher wrote:

Friends of the Earth Cymru director Gareth Clubb "We know that
shale
gas is a lot more emissions intensive than the use of conventional
gas, for example. And in many cases it would come in only slightly
better than coal, or in some places worse than coal."

Any one know what that means or the science it is based on?
what makes you think anything FoE say is based on science?

Nothing at all. I certainly don't take what FoE say at face value
hence asking the question.

I don't know how "clean" shale gas is compared to say north sea gas,
it may have a significantly different composition. Just like crude
oil varies depending on which hole in the ground you get it from.

the shaleness is orthogonal to the cleanness.

a typical oil/gas/water deposit is an anticline of impermeable material
over a layer of permeable material. Shale oil and gas is simply where
the permeability of the permeable bit is '****ing poor' so they smash
the rock up with high pressure water and other crap to let the gas and
oil come to the well heads.

As far as i know its no better r worse than anyiother gas.

What Clubbed to Death But Not Quite Enough may be thinking - if what
goes on in what appears to be a mind can be dignified with that term -
is that it takes so much fossil energy to extract it that the final
total emissions are no better than coal per unit usable energy available.

Which I SERIOUSLY doubt.


--
To people who know nothing, anything is possible.
To people who know too much, it is a sad fact
that they know how little is really possible -
and how hard it is to achieve it.

Tim Streater wrote:
In article ,
The Natural Philosopher wrote:

Tim Watts wrote:
tony sayer wrote:
In article
o.uk, Dave
Liquorice scribeth thus
On Mon, 16 Apr 2012 21:32:22 +0100, The Natural Philosopher wrote:

I'm not so sure - all the stuff in the road on 240V and 11kV is
usually
ali and has been for years.
they are presumably catenary..?

Or do you men underground?
"in the road" I read as meaning buried.

Nearly sure my underground is copper..
All the 11kV distribution around here is copper. Nice green tinge in
the right light and when they replaced the line up the otherside of
the valley a few years back that shone a lovely copper colour for a
while. I saw some on the ground 1/2" dia copper colour all the way
through so not CCA.

Have seen Ally round these parts as I have a lump of it, given to
me by
a lineman when it came off an insulator and started arcing;!.

Sometimes I believe on higher voltage lines it has a steel wire core
tho....
Given ali is weak, I thought all lines were steel cored?
all catenaries are, I am sure.

Don't all cables hang in catenaries?

no. some lie on the bottom of trenches..

--
To people who know nothing, anything is possible.
To people who know too much, it is a sad fact
that they know how little is really possible -
and how hard it is to achieve it.

Tim Watts wrote:
The Other Mike wrote:

On Tue, 17 Apr 2012 10:47:57 +0100, The Natural Philosopher
wrote:

all catenaries are, I am sure.
Most two conductor per phase installations or refurbishments at 275kV
and 400kV in the UK will be all aluminum.



Interesting - wonder if its a (new) alloy? If regular ali works, I would
have thought they'd have done it decades ago?


used to be soft ally wound over a steel core.


But aerospace grade magnesium alloys are a LOT higher tensile strength.

Maybe they are now cheaper than the steel composite?


--
To people who know nothing, anything is possible.
To people who know too much, it is a sad fact
that they know how little is really possible -
and how hard it is to achieve it.

On Tue, 17 Apr 2012 12:42:30 +0100, Tim Streater
wrote:

That Tony Juniper was on the Toddy prog this a.m. He's saying that "a
study" indicates it takes a lot of energy in in order to get the gas
out. That appears to be the substance of the argument. It helps, of
course, if you pick the right study.

A lot of energy....like the huge input you require in order to get a
wind turbine to generate SFA.

Obviously the effort required to get a nuke to generate for nearly
half a century is dismissed outright becuase it doesn't fit with their
agenda of eternal darkness.


--

On Tue, 17 Apr 2012 13:27:16 +0100, Tim Watts
wrote:

The Other Mike wrote:

On Tue, 17 Apr 2012 10:47:57 +0100, The Natural Philosopher
wrote:

all catenaries are, I am sure.

Most two conductor per phase installations or refurbishments at 275kV
and 400kV in the UK will be all aluminum.


Interesting - wonder if its a (new) alloy? If regular ali works, I would
have thought they'd have done it decades ago?

It's not that new, the alloys have been round for a long time in other
applications. "big" all aluminium conductors were effectively
invented in the UK by Jim Ferguson in the dying days of the CEGB in
the 1980's.

One of the definitive papers on the subject is indexed by google but
inaccessible to the public from what I can see. Maybe it is available
elsewhere or even on google for free?

Top result of Google finds it at ieee.org

"JM ferguson ARAUCARIA AAAC"

There is a bit of info here

http://www.aluminium-conductors.com/

and here

http://www.acsrconductor.com/products.html#aaac

These BSI's (from local library) reflect the historic position for
mainly distribution voltages, nothing over 400mm, extremely
restrictive on spans and loading

BS 215-1:1970
BS 215-2:1970

Lots of info here but subscription only (maybe access available from
the local library?)

http://www.cigre.org/Publications/Papers-proceedings

A problem with all aluminium conductors is that they are very bulky
and extremely hard to handle and manipulate in the largest sizes.
They also present a huge profile to wind increasing the mechanical
loading on the towers.

'Gap' conductors are probably viewed as state of the art, a nearly all
aluminium conductor with an extremely small steel core that is
effectively separated mechanically from the current carrying aluminium
outer layers by a thick coaxial layer of grease, very expensive
though!

Some info on Gap conductors

http://lamifil.be/wp-content/uploads...ZTACSR_NG1.pdf


The aluminium over steel (ACSR) cables previously used have the
aluminium directly wrapped over the steel so as they expand and
contract they are prone to wires rubbing and breaking. Despite some
grease impregnation they are also prone to corrosion.



--

In article , Rod Speed
scribeth thus
tony sayer wrote
Rod Speed wrote

They Guaridn do exactly the same thing in the TV guide in
the Informania piechart where I have to wobble the page
in the light to try and tell the difference between the
sort-of-reddy-bluey-purple segment and the
sort-of-bluey-reddy-purple segment next to it.

Bet you do have a color problem, even tho
you may well not be technically colorblind.

The original is very obviously readable to me.

Simple online colour test here...
http://colorvisiontesting.com/online%20test.htm

Dunno, its nothing like the official colorblind tests I have
done and there is no reason for a 3 second limit either.

So which ones have you done then, they are all reasonably similar.

Don't think it matters about time limits they appear as they are to me
very quickly?..

Anyone else find the same?..
--
Tony Sayer

A problem with all aluminium conductors is that they are very bulky
and extremely hard to handle and manipulate in the largest sizes.
They also present a huge profile to wind increasing the mechanical
loading on the towers.

'Gap' conductors are probably viewed as state of the art, a nearly all
aluminium conductor with an extremely small steel core that is
effectively separated mechanically from the current carrying aluminium
outer layers by a thick coaxial layer of grease, very expensive
though!

Some info on Gap conductors

http://lamifil.be/wp-content/uploads...ZTACSR_NG1.pdf


The aluminium over steel (ACSR) cables previously used have the
aluminium directly wrapped over the steel so as they expand and
contract they are prone to wires rubbing and breaking. Despite some
grease impregnation they are also prone to corrosion.





All very interesting. They renewed the line from Stocking Pelham to
Wisbech (Walpole) a few years ago. Looked like fewer overall conductors
I suppose thats due to these newer cables being tighter packed as it
were with the trapezoidal profiles?.

What's a typical current rating and operating temp of such a line?..
--
Tony Sayer

In article ,
tony sayer wrote:
In article , Rod Speed
scribeth thus
tony sayer wrote
Rod Speed wrote

They Guaridn do exactly the same thing in the TV guide in
the Informania piechart where I have to wobble the page
in the light to try and tell the difference between the
sort-of-reddy-bluey-purple segment and the
sort-of-bluey-reddy-purple segment next to it.

Bet you do have a color problem, even tho
you may well not be technically colorblind.

The original is very obviously readable to me.

Simple online colour test here...
http://colorvisiontesting.com/online%20test.htm

Dunno, its nothing like the official colorblind tests I have
done and there is no reason for a 3 second limit either.

So which ones have you done then, they are all reasonably similar.

Don't think it matters about time limits they appear as they are to me
very quickly?..

Yes, they are all similar, but with different colours. I did a colour
blindness test when the BBC was about to start colour tv and passed with
normal colour vision. However, it is worth noting that 1 man in 10 is
colour blind and only 1 woman in 100.

--
From KT24

Using a RISC OS computer running v5.18

tony sayer wrote
Rod Speed wrote
tony sayer wrote
Rod Speed wrote

They Guaridn do exactly the same thing in the TV guide in
the Informania piechart where I have to wobble the page
in the light to try and tell the difference between the
sort-of-reddy-bluey-purple segment and the
sort-of-bluey-reddy-purple segment next to it.

Bet you do have a color problem, even tho
you may well not be technically colorblind.

The original is very obviously readable to me.

Simple online colour test here...
http://colorvisiontesting.com/online%20test.htm

Dunno, its nothing like the official colorblind tests I have
done and there is no reason for a 3 second limit either.

So which ones have you done then,

The ones used here, Australia, for flying licenses.

they are all reasonably similar.

The ones I used were similar in the sense that they were
colored dots, but all were numbers, not shapes.

Don't think it matters about time limits

Then why are there time limits with that one and not with the standard ones
?

they appear as they are to me very quickly?..

Anyone else find the same?..

Yeah, same here, but then I'm not color blind.

"charles" wrote in message
...
In article ,
tony sayer wrote:
In article , Rod Speed
scribeth thus
tony sayer wrote
Rod Speed wrote

They Guaridn do exactly the same thing in the TV guide in
the Informania piechart where I have to wobble the page
in the light to try and tell the difference between the
sort-of-reddy-bluey-purple segment and the
sort-of-bluey-reddy-purple segment next to it.

Bet you do have a color problem, even tho
you may well not be technically colorblind.

The original is very obviously readable to me.

Simple online colour test here...
http://colorvisiontesting.com/online%20test.htm

Dunno, its nothing like the official colorblind tests I have
done and there is no reason for a 3 second limit either.

So which ones have you done then, they are all reasonably similar.

Don't think it matters about time limits they appear as they are to me
very quickly?..

Yes, they are all similar, but with different colours.

I meant that they are usually numbers, not shapes
http://en.wikipedia.org/wiki/Color_blindness#Diagnosis

I did a colour blindness test when the BBC was about to start colour
tv and passed with normal colour vision. However, it is worth noting
that 1 man in 10 is colour blind and only 1 woman in 100.

Quite a few with the less severe color blind problems only have it
picked up when applying to join the military in the medical for that.

On Tue, 17 Apr 2012 17:37:43 +0100, tony sayer
wrote:

A problem with all aluminium conductors is that they are very bulky
and extremely hard to handle and manipulate in the largest sizes.
They also present a huge profile to wind increasing the mechanical
loading on the towers.

'Gap' conductors are probably viewed as state of the art, a nearly all
aluminium conductor with an extremely small steel core that is
effectively separated mechanically from the current carrying aluminium
outer layers by a thick coaxial layer of grease, very expensive
though!

Some info on Gap conductors

http://lamifil.be/wp-content/uploads...ZTACSR_NG1.pdf


The aluminium over steel (ACSR) cables previously used have the
aluminium directly wrapped over the steel so as they expand and
contract they are prone to wires rubbing and breaking. Despite some
grease impregnation they are also prone to corrosion.



All very interesting. They renewed the line from Stocking Pelham to
Wisbech (Walpole) a few years ago. Looked like fewer overall conductors
I suppose thats due to these newer cables being tighter packed as it
were with the trapezoidal profiles?.

That would be an original 400kV build from the 60's so quad 400mm^2
aluminium over steel. Replacement would almost certainly be all
aluminium, twin or triple 700mm^2.

Some lines from the original 60's 70's build may have been restrung in
their original configuration but that is quite rare when you can get
far better performance with fewer conductors per phase.

The Thames and Severn Crossings are the most extreme spans and
conditions found in the UK and have been restrung in the past 15 years
or so, but i'm not sure what they used, probably a gapped conductor
rather than all aluminium to reduce wind loading.

What's a typical current rating and operating temp of such a line?..

70 - 75 deg C 3000A continuous
90 deg C up to 5000A short term (max of 30 mins)
Up to 6250A very short term (2 minutes)
50000A under fault conditions (half a second)

--

The aluminium over steel (ACSR) cables previously used have the
aluminium directly wrapped over the steel so as they expand and
contract they are prone to wires rubbing and breaking. Despite some
grease impregnation they are also prone to corrosion.



All very interesting. They renewed the line from Stocking Pelham to
Wisbech (Walpole) a few years ago. Looked like fewer overall conductors
I suppose thats due to these newer cables being tighter packed as it
were with the trapezoidal profiles?.

That would be an original 400kV build from the 60's so quad 400mm^2
aluminium over steel. Replacement would almost certainly be all
aluminium, twin or triple 700mm^2.

Some lines from the original 60's 70's build may have been restrung in
their original configuration but that is quite rare when you can get
far better performance with fewer conductors per phase.

The Thames and Severn Crossings are the most extreme spans and
conditions found in the UK and have been restrung in the past 15 years
or so, but i'm not sure what they used, probably a gapped conductor
rather than all aluminium to reduce wind loading.

What's a typical current rating and operating temp of such a line?..

70 - 75 deg C 3000A continuous
90 deg C up to 5000A short term (max of 30 mins)
Up to 6250A very short term (2 minutes)
50000A under fault conditions (half a second)


Interesting..

Next question is what sort of size are the transformers involved for
that?.

Taking the 11 kV IIRC up to grid distribution and back down for 132
Local. Last time I saw one it didn't seem -that- big?.

Might have been mistaken tho!.

Are these a type of autotransformer or with separate primary/secondary
windings?..
--
Tony Sayer

In article , Rod Speed
scribeth thus
tony sayer wrote
Rod Speed wrote
tony sayer wrote
Rod Speed wrote

They Guaridn do exactly the same thing in the TV guide in
the Informania piechart where I have to wobble the page
in the light to try and tell the difference between the
sort-of-reddy-bluey-purple segment and the
sort-of-bluey-reddy-purple segment next to it.

Bet you do have a color problem, even tho
you may well not be technically colorblind.

The original is very obviously readable to me.

Simple online colour test here...
http://colorvisiontesting.com/online%20test.htm

Dunno, its nothing like the official colorblind tests I have
done and there is no reason for a 3 second limit either.

So which ones have you done then,

The ones used here, Australia, for flying licenses.

they are all reasonably similar.

The ones I used were similar in the sense that they were
colored dots, but all were numbers, not shapes.

And does that matter?. All your truing to do is recognise one colour
from the other?..


Don't think it matters about time limits

Then why are there time limits with that one and not with the standard ones
?

they appear as they are to me very quickly?..

Anyone else find the same?..

Yeah, same here, but then I'm not color blind.


Good for you!...
--
Tony Sayer

On Wed, 18 Apr 2012 14:19:15 +0100, tony sayer
wrote:

Next question is what sort of size are the transformers involved for
that?.


Remember that is not just one transformer, the supergrid is an
infinite bus, everywhere has at least two points of infeed. The
circuit breakers are only rated at 50000A so everything else has to
follow suit.

But the transformers are big - 1000MVA and weighing a couple of
hundred tonnes or thereabouts.

Taking the 11 kV IIRC up to grid distribution and back down for 132
Local. Last time I saw one it didn't seem -that- big?.

Might have been mistaken tho!.

Are these a type of autotransformer or with separate primary/secondary
windings?..

In the UK everything 400/275 or 400/132 or 275/132 is an auto
transformer.


--

In article ,
The Other Mike wrote:
On Wed, 18 Apr 2012 14:19:15 +0100, tony sayer
wrote:

Next question is what sort of size are the transformers involved for
that?.


Remember that is not just one transformer, the supergrid is an
infinite bus, everywhere has at least two points of infeed. The
circuit breakers are only rated at 50000A so everything else has to
follow suit.

But the transformers are big - 1000MVA and weighing a couple of
hundred tonnes or thereabouts.

When I was working in Bruce Peebles, the 120MVA transformers to go on the
new Kincardine power station output weighted 120 tons. Pickfords did have
a low loader which took the weight, but the transformers (2 of them) had to
cross the Forth by boat as no bridge would take the weight.

--
From KT24

Using a RISC OS computer running v5.18

On Tue, 17 Apr 2012 08:20:40 +0100, Dave Liquorice wrote:


Can't say I'm overly enamoured about all this gas that has been
discovered. It's going to make energy cheap again and reduce investment
in other energy sources and do nothing for how much ancient carbon is
being dumped into the atmosphere. Dash for gas all over again but maybe
on a global scale.

When I (briefly) worked for British Gas, a couple of the experts (who
were rarely in the UK, as it was more effective to hire them out to other
countries, such was their knowledge of high-pressure gas distribution)
came back from the USSR (as 'twas) having met Russian scientists who
spoke of a theory (which the USSR accepted as fact) that the Earths crust
had a layer of methane deep below it.

With all this talk of shale gas, and the dominance of the European gas
market by Russia, I often wonder if they were onto something.

Obvious disclaimer is that I am not a geologist.

tony sayer wrote:
The aluminium over steel (ACSR) cables previously used have the
aluminium directly wrapped over the steel so as they expand and
contract they are prone to wires rubbing and breaking. Despite some
grease impregnation they are also prone to corrosion.


All very interesting. They renewed the line from Stocking Pelham to
Wisbech (Walpole) a few years ago. Looked like fewer overall conductors
I suppose thats due to these newer cables being tighter packed as it
were with the trapezoidal profiles?.
That would be an original 400kV build from the 60's so quad 400mm^2
aluminium over steel. Replacement would almost certainly be all
aluminium, twin or triple 700mm^2.

Some lines from the original 60's 70's build may have been restrung in
their original configuration but that is quite rare when you can get
far better performance with fewer conductors per phase.

The Thames and Severn Crossings are the most extreme spans and
conditions found in the UK and have been restrung in the past 15 years
or so, but i'm not sure what they used, probably a gapped conductor
rather than all aluminium to reduce wind loading.

What's a typical current rating and operating temp of such a line?..
70 - 75 deg C 3000A continuous
90 deg C up to 5000A short term (max of 30 mins)
Up to 6250A very short term (2 minutes)
50000A under fault conditions (half a second)


Interesting..

Next question is what sort of size are the transformers involved for
that?.

Taking the 11 kV IIRC up to grid distribution and back down for 132
Local. Last time I saw one it didn't seem -that- big?.

Might have been mistaken tho!.

Are these a type of autotransformer or with separate primary/secondary
windings?..


transformer SIZE is related primarily to POWER and FREQUENCY and
slightly to EFFICIENCY.

If you like you can store only so much magnetic energy in a lump of
iron. Multiply that by 100HZ and get the power rating.


so if 2kg of iron can do 500W 2 tonnes can do 500KW and so on.

--
To people who know nothing, anything is possible.
To people who know too much, it is a sad fact
that they know how little is really possible -
and how hard it is to achieve it.

charles wrote:

When I was working in Bruce Peebles, the 120MVA transformers to go on the
new Kincardine power station output weighted 120 tons. Pickfords did have
a low loader which took the weight, but the transformers (2 of them) had to
cross the Forth by boat as no bridge would take the weight.

My spell at the then AEI Transformer works at Wythenshaw
coincided with a period of bad luck - several products revealed
problems on final test. The only one to get through was a 250 ton
transformer.

During the week preceding dispatch, Wynns slowly assembled one of
their large transporters which was set up with a hover skirt,
powered by (IIRC) a gas turbine truck, which was to be used when
crossing some questionable bridges.

I've just discovered this video of the arrangement:
http://www.youtube.com/watch?v=plWukUpqb9M

However, it didn't manage to get out of the factory.

I never saw the official report, but apparently the transformer
centre of mass was slightly offset, and during loading onto the
trailer, one side beam took too much of the weight. One of the
swan necks fractured, and the shock of this took another two with
it. I have never seen such an area of freshly sheared metal.

The transformer had to be de-tanked, only to discover that the
laminations had moved with the shock of the drop, necessitating a
strip and rebuild.

Chris
--
Chris J Dixon Nottingham UK


Have dancing shoes, will ceilidh.

On 18/04/2012 16:37, Jethro_uk wrote:

When I (briefly) worked for British Gas, a couple of the experts (who
were rarely in the UK, as it was more effective to hire them out to other
countries, such was their knowledge of high-pressure gas distribution)
came back from the USSR (as 'twas) having met Russian scientists who
spoke of a theory (which the USSR accepted as fact) that the Earths crust
had a layer of methane deep below it.

With all this talk of shale gas, and the dominance of the European gas
market by Russia, I often wonder if they were onto something.

Obvious disclaimer is that I am not a geologist.

I remember this. Thomas Gold was the man who came up with the theory.

http://en.wikipedia.org/wiki/Thomas_Gold

Along with Hermann Bondi and Fred Hoyle he was an advocate of the Steady
State Theory which was a rival of the Big Bang Theory in the 1950s.

He also believed that life on earth was a result of extraterrestrials
dumping their waste on Earth.

Another Dave
--
Change nospam to gmx

Another Dave wrote:
On 18/04/2012 16:37, Jethro_uk wrote:

When I (briefly) worked for British Gas, a couple of the experts (who
were rarely in the UK, as it was more effective to hire them out to other
countries, such was their knowledge of high-pressure gas distribution)
came back from the USSR (as 'twas) having met Russian scientists who
spoke of a theory (which the USSR accepted as fact) that the Earths crust
had a layer of methane deep below it.

With all this talk of shale gas, and the dominance of the European gas
market by Russia, I often wonder if they were onto something.

Obvious disclaimer is that I am not a geologist.

I remember this. Thomas Gold was the man who came up with the theory.

http://en.wikipedia.org/wiki/Thomas_Gold

Along with Hermann Bondi and Fred Hoyle he was an advocate of the Steady
State Theory which was a rival of the Big Bang Theory in the 1950s.

He also believed that life on earth was a result of extraterrestrials
dumping their waste on Earth.


this explaining Ed Miliband exactly.

Ho hum...




--
To people who know nothing, anything is possible.
To people who know too much, it is a sad fact
that they know how little is really possible -
and how hard it is to achieve it.

tony sayer wrote
Rod Speed wrote
tony sayer wrote
Rod Speed wrote
tony sayer wrote
Rod Speed wrote

They Guaridn do exactly the same thing in the TV guide in
the Informania piechart where I have to wobble the page
in the light to try and tell the difference between the
sort-of-reddy-bluey-purple segment and the
sort-of-bluey-reddy-purple segment next to it.

Bet you do have a color problem, even tho
you may well not be technically colorblind.

The original is very obviously readable to me.

Simple online colour test here...
http://colorvisiontesting.com/online%20test.htm

Dunno, its nothing like the official colorblind tests I have
done and there is no reason for a 3 second limit either.

So which ones have you done then,

The ones used here, Australia, for flying licenses.

they are all reasonably similar.

The ones I used were similar in the sense that they were
colored dots, but all were numbers, not shapes.

And does that matter?. All your truing to do is recognise one colour from
the other?..

Sure, but the new time limit which standard tests don’t
have did make me wonder if there was more involved
than just a shape being used instead of a number.

Maybe its someone's idea of what can work better with
babys etc, but that doesn’t work either with the new time
limit where it can be difficult to get babys to concentate
on what you want them to do etc.

Don't think it matters about time limits

Then why are there time limits with that one and not with the standard
ones ?

they appear as they are to me very quickly?..

Anyone else find the same?..

Yeah, same here, but then I'm not color blind.

Good for you!...

In article , The Other Mike
scribeth thus
On Wed, 18 Apr 2012 14:19:15 +0100, tony sayer
wrote:

Next question is what sort of size are the transformers involved for
that?.


Remember that is not just one transformer, the supergrid is an
infinite bus, everywhere has at least two points of infeed.

Yes ..

The
circuit breakers are only rated at 50000A so everything else has to
follow suit.

50 K amps;!.. Impressive!, the ones you see in some Youtube vids don't
quite look that serious but I suppose must be..


But the transformers are big - 1000MVA and weighing a couple of
hundred tonnes or thereabouts.

Taking the 11 kV IIRC up to grid distribution and back down for 132
Local. Last time I saw one it didn't seem -that- big?.

Might have been mistaken tho!.

Are these a type of autotransformer or with separate primary/secondary
windings?..

In the UK everything 400/275 or 400/132 or 275/132 is an auto
transformer.


Right.. Thanks no need for isolation as such..


--
Tony Sayer

tony sayer wrote:
In article , The Other Mike
scribeth thus
On Wed, 18 Apr 2012 14:19:15 +0100, tony sayer
wrote:

Next question is what sort of size are the transformers involved for
that?.

Remember that is not just one transformer, the supergrid is an
infinite bus, everywhere has at least two points of infeed.

Yes ..

The
circuit breakers are only rated at 50000A so everything else has to
follow suit.

50 K amps;!.. Impressive!, the ones you see in some Youtube vids don't
quite look that serious but I suppose must be..

But the transformers are big - 1000MVA and weighing a couple of
hundred tonnes or thereabouts.

Taking the 11 kV IIRC up to grid distribution and back down for 132
Local. Last time I saw one it didn't seem -that- big?.

Might have been mistaken tho!.

Are these a type of autotransformer or with separate primary/secondary
windings?..
In the UK everything 400/275 or 400/132 or 275/132 is an auto
transformer.


Right.. Thanks no need for isolation as such..

I think that happens at the 33KV level. It for sure happens at the 240v
level




--
To people who know nothing, anything is possible.
To people who know too much, it is a sad fact
that they know how little is really possible -
and how hard it is to achieve it.

En el artículo ,
Tim Streater escribió:

Your spelling really is ****ed, isn't it.

Doesn't know how to use apostrophes either.

Rod Speed FAQ: http://tinyurl.com/883xp7v

--
(\_/)
(='.'=)
(")_(")

On Sunday, 15 April 2012 21:54:15 UTC+1, jgharston wrote:
Mike Barnes wrote:
OK, but AAMOI what colours do you suggest? Orange and green look pretty
different to me, and I'm in OAP territory.

I've been staring at the diagram and fiddling with the colour controls
on my monitor, and on that diagram they look identical to me.

Are you (partially) red-green colour blind? That might well explain your problem.


Three colours on a grey background? How about black, white, blue, red,
(orange OR green OR yellow). That's five. There are simple tools
to work out the best contrasts between colours, but the most effective
tool is actually learning it in the first place.

The contrast is different for different individuals. They could have used red instead of orange - but that wouldn't help for some.

A better choice would have been solid green for "in progress" and dotted green for "proposed"

On Sunday, April 15, 2012 5:36:36 PM UTC+1, Tim Watts wrote:
Mike Tomlinson wrote:

En el artículo , Andy
Burns escribió:

That's a lot of copper at 800 tonnes/km

Exquisite timing too, given that the price of copper is at, or close to,
an all-time high.


What's the price of aluminium? They don't use copper for any other large
power cables as a rule - all ali - would an interconnector be any different?



IIRC they use aluminium for suspended power cables because it has a higher conductivity per unit mass than copper does. But copper has higher conductivity per unit volume.

On Tue, 17 Apr 2012 12:42:30 +0100, Tim Streater
wrote:

That Tony Juniper was on

Does he have a sister called Jennifer, I wonder.

On Wed, 18 Apr 2012 15:37:37 GMT, Jethro_uk
wrote:

having met Russian scientists who
spoke of a theory (which the USSR accepted as fact) that the Earths crust
had a layer of methane deep below it.

Leads to an image of the Eargh shooting off into space like a farting
balloon, should someone drill too deep.