TOT Newbury

On 14/02/2011 19:23, tony sayer wrote:
In , Mark Carver

Well, there's an insulator on a 33kV line near me that 'fizzes' in damp
weather, you can see a large chip in the porcelain, so I think that's
probably the 'fizzy' one. Been like it for at least ten years.


If it supplied yourself Mark I'd report it and make a fuss as come the
first storm that hits the line;!...

It does supply our estate, you're right, I should report it really.
Funny thing is, in 2003 the SEB spent the summer burying three 33kV
conductors, and an 11kV 'three core' along the same route as the
overhead lines. I spoke to the bods doing the work, and it was to
replace the overhead lines, with the 11kV chucked in for future
expansion. They did about a mile's worth from the sub station outwards
towards the countryside, then vanished, leaving the underground cables
dormant. This week they've returned, to carry on. The lines run
alongside our house, so I am looking forward to the day they are finally
removed. Not exactly a rush job though, is it !?

--
Mark
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http://www.paras.org.uk/

On 14/02/2011 12:11, Jim Lesurf wrote:
In , Mark Carver
wrote:


AIUI it's even a problem in grazing fields that have 11, 33, or 66kV
overhead transmission lines. The wooden pole has a metal cross bar which
the three insulators sit upon. The cross bar is earthed via a bonding
cable that runs down the pole. I was told by an SEB engineer years ago,
that the lekky boards pay out thousands each year to farmers that have
had quality of milk affected due to the currents those earth bonding
points induce into the field, and consequently into the livestock as
they wander around. I assume he wasn't winding me up ?!

I'd be interested in seeing a reference for that.

A quick Google brings up this:-

http://www.journalofdairyscience.org...516-5/abstract


--
Mark
Please replace invalid and invalid with gmx and net to reply.

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In article ,
Mark Carver wrote:
On 14/02/2011 12:11, Jim Lesurf wrote:
In , Mark Carver
wrote:


AIUI it's even a problem in grazing fields that have 11, 33, or 66kV
overhead transmission lines. The wooden pole has a metal cross bar
which the three insulators sit upon. The cross bar is earthed via a
bonding cable that runs down the pole. I was told by an SEB engineer
years ago, that the lekky boards pay out thousands each year to
farmers that have had quality of milk affected due to the currents
those earth bonding points induce into the field, and consequently
into the livestock as they wander around. I assume he wasn't winding
me up ?!

I'd be interested in seeing a reference for that.

A quick Google brings up this:-

http://www.journalofdairyscience.org...516-5/abstract

which is of course an American source. I don't think their 'grid'
standards are quite as high as ours.

--
From KT24

Using a RISC OS computer running v5.16

In article , charles
wrote:
In article , Mark Carver
wrote:
On 14/02/2011 12:11, Jim Lesurf wrote:

I'd be interested in seeing a reference for that.

A quick Google brings up this:-

http://www.journalofdairyscience.org...516-5/abstract

which is of course an American source. I don't think their 'grid'
standards are quite as high as ours.

Not read the paper. But a quick look at the abstract and the first few
paras makes me think the experiment was on exposure to airbourn E and H
fields. Not ground potential differences produced by leakage down an
earthing lead causing currents via the legs though the body. Different
kettle of worms.

I assume the experiment was to simulate the effects of being immersed in
the EH fields in the *air* surrounding power lines.

Slainte,

Jim

--
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In message on Mon, 14 Feb 2011 12:19:46 -0000
Max Demian wrote:

"Bill Wright" wrote in message
...
Java Jive wrote:
As you say, mains is quite a different matter. If IUIC, it's the
total power delivered in the shock that matters.

Electric fences used in agriculture are commonly powered by batteries,
and when you get near them, you can often hear a regular clicking once
a second or so as it delivers a brief, timed kick to the fence under
the control of a timer.

The ones of my youth had a mechanism like the thing that serves as a
pendulum in a watch (can't think of the word). A large wheel with a
spring, so the wheel oscillated backwards and forwards.

"Spring balance wheel" - doh!

Is it actually spring driven, though? A spring balance wheel needs something to drive it
- like a mainspring (in a watch).

I was interested to see inside the controller cabinet for the lights on a level crossing
on a preserved railway in Belgium a couple of years ago.

It used three mercury tilt switches, one for each light - two red + one white - in the UK
a fixed amber is fitted in place of the continental flashing white which indicates that
the crossing is clear for road traffic.

The switches were mounted on a wheel, not unlike the sping balance in a watch, but it
looked to me as if it was weighted at the bottom, to give it a pendulum action, and given
a kick by an electromagnet when required.

Something similar to a Hipp's clock:

http://www.electric-clocks.nl/clocks...ation-Hipp.htm

as used (or variants thereof) in master clocks in schools, public buildings, railway
stations, factory time clocks, etc, etc, in the days of yore ...

--

Terry

On 15/02/2011 08:39, charles wrote:
In ,
Mark wrote:

A quick Google brings up this:-

http://www.journalofdairyscience.org...516-5/abstract

which is of course an American source. I don't think their 'grid'
standards are quite as high as ours.

No, they're certainly not, but I don't think the laws of physics differ
too much over there ? ;-)



--
Mark
Please replace invalid and invalid with gmx and net to reply.

http://www.paras.org.uk/

"tony sayer" wrote:

In article , Brian Lawrence
scribeth thus
"Peter" wrote:

On Sun, 13 Feb 2011 18:42:14 -0000, "Graham." wrote:


"Bill Wright" wrote in message
ioe.org...
I wonder if the panel has anyone from the electricity distribution industry
who might like
to comment about the incident at Newbury
races yesterday.

Bill

I do know, but only from lurking on uk.d-i-y over the years, that any
electrician working
in farms etc will (should) know that there are recognised issues with large
four-legged
animals being at risk of shock or electrocution simply because of the extra PD
across
their front and hind limbs, not to mention the extra current due to their bare
feet or
even nailed-on steel shoes.

I know diddley squat about horse raciing or horses, but ISTR reading
that race horses are shod with lightweight aluminium shoes in
preparation for them galloping along a field

I heard that the two fatalities were shod with steel while most of the others
were
in aluminium plates and were less affected.


You've been reading the "Current bun" haven't yer;?..

No, the missus read it in Sunday's Mail, but I also read it in Monday's Telegraph.
Both of the dead horses were essentially novices, so perhaps using the slightly
heavier steel plates might be a better choice than starting their careers on
lighter aluminium ones.

On Tue, 15 Feb 2011 10:21:12 +0000, Mark Carver said...
On 15/02/2011 08:39, charles wrote:
In ,
Mark wrote:

A quick Google brings up this:-

http://www.journalofdairyscience.org...516-5/abstract

which is of course an American source. I don't think their 'grid'
standards are quite as high as ours.

No, they're certainly not, but I don't think the laws of physics differ
too much over there ? ;-)

I have it on good authority that you cannae change the laws of physics.
Captain.

--
Mark Myers
usenet at mcm2007 dot plus dot com

"Mark Myers" wrote in message
.. .
On Tue, 15 Feb 2011 10:21:12 +0000, Mark Carver said...
On 15/02/2011 08:39, charles wrote:
In ,
Mark wrote:

A quick Google brings up this:-

http://www.journalofdairyscience.org...516-5/abstract

which is of course an American source. I don't think their 'grid'
standards are quite as high as ours.

No, they're certainly not, but I don't think the laws of physics differ
too much over there ? ;-)

I have it on good authority that you cannae change the laws of physics.
Captain.

--
Mark Myers
usenet at mcm2007 dot plus dot com


.......so how did he beam him up? He was clearly speaking with forked tongue.

Sheila

On 15/02/2011 09:30, Jim Lesurf wrote:

wrote:
On 14/02/2011 12:11, Jim Lesurf wrote:

I'd be interested in seeing a reference for that.

A quick Google brings up this:-

http://www.journalofdairyscience.org...516-5/abstract

Not read the paper. But a quick look at the abstract and the first few
paras makes me think the experiment was on exposure to airbourn E and H
fields. Not ground potential differences produced by leakage down an
earthing lead causing currents via the legs though the body. Different
kettle of worms.

Yes, it is, but it's the only on-line reference I could find that
connects 'electricity' with milk quality in any way.

--
Mark
Please replace invalid and invalid with gmx and net to reply.

http://www.paras.org.uk/