ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
Why cables look like they do
by LongRunner. 04/26/17 09:36 AM
Dimmable LED 2x4 lay in fixtures
by HotLine1. 04/24/17 05:43 PM
Old decora style outlets
by Lostazhell. 04/22/17 07:59 PM
Permit Snafus...AHJs and Contractors Jump in
by gfretwell. 04/22/17 01:11 PM
How do you find a good employee?
by HotLine1. 04/22/17 10:44 AM
New in the Gallery:
SE cable question
Popular Topics(Views)
234,765 Are you busy
169,519 Re: Forum
162,801 Need opinion
Who's Online Now
1 registered members (gfretwell), 62 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#122880 - 01/29/06 01:40 PM 33 kV Pole on its Side  
electure  Offline

Joined: Dec 2000
Posts: 4,259
Fullerton, CA USA

Some photo's I took during a recent storm we had in Auckland on the 24 th January 2006. This 33 / 11 kV pole blew over because of digging nearby about 100 metres from our Albany depot. I heard the actual bang from our local 33 / 11 kV substation which is on our POCO site.
The 11 kV and 230 / 400 Volts were still live. Also the streetlights were still on as were the hotwater pilots
This was at Bush rd, Albany, New Zealand.

From the Siemens depot driveway about 3 minutes after it happened.
The metal fence was alive at 230 Volts. The 11 kV line was still live. The 33 kV tripped

[Linked Image]

Closer view, as you can see from the lower crossarm which supposed to have 6 wires on it 2 are missing and 3 on the other side of the pole. In NZ we use 3Ø 230 / 400 Volts for power, and 2 control wires called pilots. One for hotwater control, the other for streetlights.

[Linked Image]

Hole about 1.5 meters deep. The ironical thing is that these lines are in the process of being converted to underground supply and the project manager didn't think of bracing the pole before the storm.

[Linked Image]

Contactors in light brown box. Note the missing, broken insulators on the LV.

[Linked Image]

Different angle

[Linked Image]

Lucky that the metal fence supported the pole otherwise it would have come down fully and snapped all the wires

[Linked Image]

Streetlight back on again.

[Linked Image]

To do the temporay patch up, the pole was straightened up and a hiab was holding it into place. I was called out for other storm duties as emergency switching etc.

[This message has been edited by electure (edited 01-29-2006).]

Tools for Electricians:

#122881 - 01/30/06 11:09 AM Re: 33 kV Pole on its Side  
pauluk  Offline
Joined: Aug 2001
Posts: 7,520
Norfolk, England
Looks like the repair crew is going to be busy for a while......

Member Spotlight
Washington...Not DC
Posts: 216
Joined: March 2005
Show All Member Profiles 

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.010s Queries: 14 (0.003s) Memory: 0.7455 MB (Peak: 0.8626 MB) Zlib enabled. Server Time: 2017-04-27 01:28:01 UTC