Re: NEMA head area light gets creamed by falling transformer « Reply #1 on: October 23, 2010, 08:02:57 AM » Author: Medved
What is strange, i never heard about any similar arcing/fires here, never seen any such arcing video from other countries then US... But wiring damage does happen, mainly in the winter, while power microcuts (~0.5s outages) during storms are common, so i assume HV wires do touch each other and/or break in heavy weather as well, but the protections work well to shut these arcs down, so we have no such shows. There is no such protection on these HV lines in US or what cause the arcing to continue for so long and even cause fires?
« Last Edit: October 23, 2010, 08:07:30 AM by Medved »		Logged

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	Re: NEMA head area light gets creamed by falling transformer « Reply #2 on: October 23, 2010, 08:32:14 AM » Author: gailgrove
Whats odd is that all of the arcing happens on the low voltage 120 volt lines not the high voltage one, and the NEMA head looks OK it just needs a new optical assembly and it will be good as new
« Last Edit: October 23, 2010, 09:13:04 AM by gailgrove »		Logged

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	Re: NEMA head area light gets creamed by falling transformer « Reply #5 on: October 23, 2010, 12:12:39 PM » Author: Medved
@don: I think this is clearly the HV line arcing with the tree. There are no "restricted area" around high voltage lines in the US (i guess it is at least 7kV line)? Here it is about (if i  remember well) 10m (30') from 22kV lines (the most common distribution to villages, there between houses is distributed only 3x230/400V, what then goes directly to homes)
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	Re: NEMA head area light gets creamed by falling transformer « Reply #6 on: October 31, 2010, 12:41:02 AM » Author: form109
been a year since i first saw the video. also consider the wind itself....it says this is during a hurricane...maybe the pole was rotted.
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	Re: NEMA head area light gets creamed by falling transformer « Reply #7 on: November 30, 2010, 03:47:08 AM » Author: tmcdllr
I think this video shows how badly the US electrical system needs upgrading, especially in residential areas. Apparently, this went on all day, from morning until that night....unbelievable! Moores Mill Road, Hartford County, Aug. 23 1988- electrical surge
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Nothing like the beautiful cool white light of a coated Mercury Vapor lamp and the soothing hum of it's magnetic ballast.

	Re: NEMA head area light gets creamed by falling transformer « Reply #9 on: May 28, 2011, 01:28:39 AM » Author: tmcdllr
I know! Can you imagine seeing that happen right in front of you? And it went on ALL DAY! Incredible! There should have been some kind of redundancy in place to shut off the power in case the normal means failed as in the video. My question is, why didn't they just shut the power off for that line in a different location? It would have reduced some of the damage I think.
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Nothing like the beautiful cool white light of a coated Mercury Vapor lamp and the soothing hum of it's magnetic ballast.

	Re: NEMA head area light gets creamed by falling transformer « Reply #10 on: June 18, 2011, 04:09:33 AM » Author: dor123
In Israel, in the winter, two storms with winds of 100 km/h (62.14 MPH) struck here and also caused damage to electricity cables and lighting poles. However, wooden poles are rare in Haifa. Most of the poles are concrete or metal. Most of the electricity in Israel, supplied from the Israel Electric Corporation, which is a government institution. There are also several private electricity suppliers that supply electricity to the arabic villages and several settlements and kibbutzim. This in contrast to the US, where most of the electricity supplied by commercial companies, similar to liner and cellular telephony, television and radio, and so the US government have little supervision on them.
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I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.

	Re: NEMA head area light gets creamed by falling transformer « Reply #12 on: July 02, 2011, 11:46:05 AM » Author: dor123
During one of the two storms that accured in Israel during the last winter, in the way to my mother home, at the begining of a street near the junction of Ramat Hashaoul neighborhood, i saw a metal electricity pole, with a transformer, in which an arc was formed between two part of the system. In this day, we have many power outages and in Carmel hospital, the generators began to operate. I wasn't be able to photograph this, because i was inside a bus, and i don't want to photograph from and inside a public transport, because of the fears that passengers would look at me.
		Logged

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.

	Re: NEMA head area light gets creamed by falling transformer « Reply #14 on: October 23, 2011, 11:05:50 PM » Author: Lightguy
The poor Nema got destroyed by the transformer. =(
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