ECN Forum Forums General Topics of the Trade General Discussion Area Power lines

Hello
I'm electrician from Poland. I'a looking for some photos about tower in power lines, distribution stations.I also want to know something about system in US (voltage levels)
I've visited some cool site about your system but I have forgoten addres
I would be gratefull if you help me.

PS.Below,the power lines we have in Poland http://www.elektroinstalacje.info/photogallery.php

[This message has been edited by Elektroinstalacje (edited 02-04-2007).]

I googled these:
http://www.fotosearch.com/DGT066/cb002101/
http://www.californiapictures.com/utility-lines-02.html
http://www.creatingonline.com/stock_photos/details.php.....

Edited to tidy link.

[This message has been edited by pauluk (edited 02-05-2007).]

Have a look at this site it will intrest you.

Lights under a power line UK

Kenny

[This message has been edited by Kenbo (edited 02-04-2007).]

Elektroinstalacje

Welcome to the ECN forum.

Interesting photo's from Poland.

I got a couple of pics from New Zealand here from 110 and 220 kV lines near Marsden point, near Whangarei.
North Island, New Zealand.

Kind regards

Raymond
https://i123.photobucket.com/albums/o298/RODALCO/DSC02208-1.jpg
https://i123.photobucket.com/albums/o298/RODALCO/DSC02204.jpg
https://i123.photobucket.com/albums/o298/RODALCO/DSC02200.jpg
https://i123.photobucket.com/albums/o298/RODALCO/DSC02206.jpg

edited to insert links (RODALCO)

[This message has been edited by RODALCO (edited 02-04-2007).]

RODALCO interesting photos. Would you mind if I put them to my site album?? I'm sure some people in Poland would see it. I'll place link to you or something like that if you want...

Do you know from what web site is this picture ? http://www.elektroinstalacje.info/photogallery.php?photo_id=121


[This message has been edited by Elektroinstalacje (edited 02-04-2007).]

Most of the pictures look really neat and modern... but I loved this one: http://www.elektroinstalacje.info/photogallery.php?photo_id=111

Do you have any idea what kind of machine that was?
The clamp that holds the motor to the table (blue handle visible below) is a nice touch too

Here's someone that could shoot some close-ups from his bedroom window



If you're up for an interesting read, here's a thread on HV transmission lines vs. construction of a new home and EMF possibly wreaking havok on the works!
https://www.electrical-contractor.net/ubb/Forum1/HTML/007916.html


BTW Welcome to ECN, Elektroinstalacje

Elektroinstalacje

No problem, You can use those photo's on your site.

I will make some more while on the road.

Also i will take some photo's from within the substations when i'm working there.

Standard voltages in New Zealand are:
All at 50 Hz
220 kV,
110 kV,
66 kV,
50 kV,
33 kV,
25 kV, (Railways)
22 kV,
11 kV,
6.6 kV
3.3 kV
400 / 230 Volts supply
110 / 63½ Volts AC and DC in substations for metering and protection.

Then a 600 kV DC link is between the North and the South Island.

A 400 kV line is in the process of being built to supply Auckland

Ok, thanks.
I can't wait to see photos of the substation.

In Poland we have several voltage levels

low : 230V (1- phase) or 400V (3-phase)
average : 6kV, 10kV, 15kV, 20kV
high: 110kV, 220kV and 400kV
There is one 750kV connect with Ukraina but inactive. Frequency 50Hz.

And one cable connection HVDC 450kV with Sweden.


[This message has been edited by Elektroinstalacje (edited 02-05-2007).]

Photos of structures supporting electricity carrying wires, especially those in different countries or those with unusual structures, location or artistic composition.
http://www.gorge.org/pylons/

Hi Elektroinstalacje, and welcome to the forum.

There are many different voltage levels used throughout the U.S., more than in most countries due to the sheer size of the nation and the various electricity companies there.

Even at the low-voltage end of the scale there are several different systems: 120/240V 3-wire, 120/208V 3-phase, 277/480V 3-phase, 240V delta, etc.

I remember somebody posted a link to a document from Cooper Transformers a year or two ago which provided a pretty good explanation of some of the different HV systems in use. Can anyone remember the link?

Over here in Britain, our most common voltage levels are 240V 1-ph or 240/415V 3-phase, 11kV, 33kV, 66kV, 132kV, 275kV, and 400kV. There are still a few local distribution systems using 6.6kV, but these are quite rare now. There are other levels used for specific purposes, such as a high-voltage D.C. interconnection with France, 25kV A.C. for long-distance railways, etc.

Here are a few photos:

Typical 33kV line

Typical 11kV line

More 11kV local distribution

Overhead to underground transition with switch, also 11kV

Small pole xfmr on single-phase spur line

Typical 3-phase pole transformer

Same pole, showing secondary fuses

Typical pad-mount xfmr in wooden enclosure

All above transformers are 11kV primary, 240V or 240/415V secondary.

Typical 240/415V overhead distribution lines

(Poles in that last photo also have telephone lines lower down.)

Single-phase xfmr feeding 240/480V 3-wire distribution in rural area

All of the above are my own pics. Feel free to copy and use if you wish.

For the larger transmission lines (132kV and upward), have a look at some of the photos on this site:
http://users.tinyonline.co.uk/bigh/bigh/photoarchive.htm

This is 124kv on top. I think it is 50kv or so on the bottom
FPL Florida
http://members.aol.com/gfretwell/124kv.jpg

Hey pauluk1
I notice in your distribution pics there are only three conductors. Is your system a 3 wire delta rather than a 4 wire wye?

In most European countries anything above 230/400V is 3w delta. Saves a lot of copper.
The transformers have a delta primary and wye secondary with grounded star point. (class DYN)

And Pauluk supplied some pictures of a System that only exists in the UK, NZ aud Australia (or maybe not even NZ) - 230/460V single phase AC.

Yes, as TR says we don't distribute a neutral on any of our HV lines. They can be wye connected at source, but the neutral goes no farther than that. Thus even a single-phase spur line has to be run as two phases, as you can see in a couple of those photos.

The 1-ph 3-wire 240/480V arrangement (O.K., its 230/460 officially now) is found in rural areas where the xfmr has to serve a relatively small group of homes. All neighborhoods of any size are wired with 4-wire 240/415 (230/400) wye LV.

As Texas_Ranger says not being sure we use 1 Phase 230 / 460 Volts in New Zealand.

Yes we use it at the 2 phase 11 kV supplies and the 1 phase 11 kV SWER system.

I will post some piccies later

Elektroinstalacje search under Photos' , SWER in this forum and there are some SWER lines and transformers from NZ.
https://www.electrical-contractor.net/ubb/Forum5/HTML/001143.html

edited to insert link



[This message has been edited by RODALCO (edited 02-06-2007).]

Gidday there Elektroinstalacje,
Welcome to ECN, mate!.
Ray (RODALCO),
I would add to that list of voltages, the now defunct, but still in use in some areas, 1.1kV system.
It was used here in both Mid and South Canterbury, in particular in South Canterbury, when the old MED (Municipal Electricity Department) had the function of a utility in Timaru and places like that.
400/230V has all but super-ceded, this system, but remnants of it still do exist.
It came about before the 400/230 system and was used as a means of a distribution system for light commercial/industrial, the primary side of the tranny being 1.1kV, the secondary being 3 phase 230 + neutral.
Ray, I thought that the DC link was 500kV, has this been bumped up as well?.
If you do get the chance Ray, go to Benmore and see the rectifier banks that supply this link, I was down there a few years ago, it is an absolutely amazing experience.
I would have taken pictures but I didn't own a digital camera at the time.
The hum from that place is like being next to a humungous welder.

The list of voltage is as long as my shopping list today

Thanks everyone for answer.
If you have some interesting pictures about this and want to share it witch electricians in Poland please write to me. I'll put them to my web album.

Mike, interesting, didn't know about the 1.1 kV system but great it is still about in the South.

Elektroinstalacje,
A few more pics taken at local 33 / 11 kV substations in West Auckland while doing maintenance work.
https://i123.photobucket.com/albums/o298/RODALCO/DSC02276.jpg

33 kV OCB sabulite road
https://i123.photobucket.com/albums/o298/RODALCO/DSC02275.jpg

33 / 11 TF sabulite road
https://i123.photobucket.com/albums/o298/RODALCO/DSC02279.jpg

33 over 11 kV sabulite road
https://i123.photobucket.com/albums/o298/RODALCO/DSC02281.jpg

T 2, 11 kV bank sabulite
https://i123.photobucket.com/albums/o298/RODALCO/DSC00421.jpg

Triangle 11 kV bank
https://i123.photobucket.com/albums/o298/RODALCO/DSC00421.jpg

33 kV Bush rd tilted powerpole. 11 kV and 400 Volts were live. The 33 kV tripped.
https://i123.photobucket.com/albums/o298/RODALCO/DSC00208.jpg

sectionaliser 11 kV near Kaitaia
https://i123.photobucket.com/albums/o298/RODALCO/DSC01005Hsn.jpg

Henderson valley sub.

hope they work, had problems with spacing (RF)

[This message has been edited by RODALCO (edited 02-10-2007).]

[This message has been edited by RODALCO (edited 02-10-2007).]

Mike
http://www.transpower.co.nz/?id=4798

It runs at 270 and 350 kV each leg.

between two phases it is 620 kV dc.

Here are a few Photos of Transmission and Distribution Circuits / Poles, for US systems.
These are located in various areas of ECN:



This shows a Wood Pole, which is carrying (I think) is one 3 Phase 66KV Transmission circuit (on the left), one 3 Phase 34.5KV Distribution circuit (top right), and a possible 4160Y/2400 3 Phase 4 Wire Distribution circuit on the lower section (the Transformer is fed from this circuit).

Behind the Wood pole is a Transposition spot, for a two 3 Phase 138KV - 230KV Transmission circuits.

To the left of the Transpositions is a 138KV 3 Phase 2 ciruit Transmission structure.



Here is an oddity: This is an Open Wye Primary, Open Delta Vee 4 Wire Secondary Transformer configuration.
The Primary Distribution feeders appear to be a 13200Y/7620V 3 Phase 4 Wire Wye system.

The Secondary is one of the "Famous" 4 Wire Deltas - with the "High Leg".
Secondary Voltage is 240/120V, 3 Phase 4 Wire Delta. Measured Voltage from the secondary bushing on the far left side of the smaller Transformer, to the center tap of the larger Transformer, will equal something in the range of 195-208 Volts, while measuring Voltage between the center tap and either the left or right bushings of the Larger Transformer, will result in 120V, and all L-L measurements will show 240V.



Here is a 4 wire Wye secondary setup, with a delta primary arrangement.
Primary side voltage is in the 4KV range (looks like 4160).



Here are some wooden poles (tilting drammatically), with two 66KV 3 Phase Transmission circuits on the upper sections, and a few 12KV 3 Phase Distribution circuits on the lower sections.



Here is a shot of some Transformers fed from what appears to be a 7200 Volt 3 Phase circuit.



Another 12KV Distribution pole.

We have a lot of other pictures scattered around ECN, just search the Photos sections + the Electrical Theory sections.

Scott35