ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
AreMetal Ladders Ever OK For Electrical Work?
by HotLine1. 01/22/18 07:31 PM
Photocell
by twh. 01/22/18 05:06 PM
VDE 0100 to introduce AFCIs
by sparky. 01/20/18 05:09 PM
MRI LED lights dimmer control replacement - wow!
by Potseal. 01/19/18 08:52 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 16 guests, and 6 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 2 1 2
Transformer Explosion #61510
01/26/06 08:10 PM
01/26/06 08:10 PM
Lostazhell  Offline OP
Member
Joined: Feb 2004
Posts: 1,431
Bakersfield, CA (Originally Or...
A transformer explosion blacked out power to an area of Hartford,CT this morning and forced the closure of Bulkeley High School, and classes will not resume until at least Monday.

Three Connecticut Light & Power workers were doing routine maintenance in an underground power hub that serves the high school and surrounding neighborhood when something went wrong and there was an explosion.

Thick black smoke could be seen billowing out of the building.

A female CL&P worker is being treated at Bridgeport Hospital's Burn Unit. Two other CL&P workers were taken to Hartford Hospital with minor injuries.

As of 4:00, more than 3,000 CL&P customers in Hartford were without power.

Power has been restored to the Maple Ave. area, but CL&P says power won't be restored completely until 8:00 p.m. Right now it's still not safe enough for workers to go back inside the transformer area.

It's unclear right now what happened. Students say they saw the lights flicker, then heard a boom, then the fire alarms sounded. The students and staff were evacuated from the building safely. Students were dismissed at 10:30 a.m.

The school didn't suffer direct damage from the fire, but there is smoke damage that has to be cleaned.

Several other schools were also affected, but they are expected to have class Friday.

Wethersfield Ave. was shut down for several hours, but was been re-opened shortly after 12:30 p.m.

Full Story and Video


My prayers are with the injured CL&P workers that were hurt from this incident... Be safe out there everyone!

Randy

Work Gear for Electricians and the Trades
Re: Transformer Explosion #61511
01/27/06 11:01 AM
01/27/06 11:01 AM
Z
Zog  Offline
Member
Joined: Sep 2005
Posts: 120
Charlotte, NC
I wonder what maintenance they were doing? Oil samples? Also I hope there were no PCB's!


MV/HV Testing Specialist, "BKRMAN"
Re: Transformer Explosion #61512
01/27/06 11:08 AM
01/27/06 11:08 AM
Radar  Offline
Member
Joined: Apr 2004
Posts: 349
Los Angeles, CA
Quote
"People will call it an explosion because when this arc expands and draws, it will give a thud or a bang, but it's not like a hand grenade or a bomb going off - it's not that kind of explosion," says Jim LaChance of CL&P.


Quoted from the linked article - - I'm sure the injured CL&P workers will be comforted knowing this.


There are 10 types of people. Those who know binary, and those who don't.
Re: Transformer Explosion #61513
01/27/06 12:02 PM
01/27/06 12:02 PM
S
SvenNYC  Offline
Member
Joined: Aug 2002
Posts: 1,691
New York City
Well....

Good thing these guys didn't get killed.

Re: Transformer Explosion #61514
01/27/06 02:59 PM
01/27/06 02:59 PM
mxslick  Offline
Member
Joined: Oct 2004
Posts: 803
Atomic City, ID USA
Quote
"People will call it an explosion because when this arc expands and draws, it will give a thud or a bang, but it's not like a hand grenade or a bomb going off - it's not that kind of explosion," says Jim LaChance of CL&P.


Is this guy serious? Has he ever even been around an electrical explosion? (I have) Or even a hand grenade (I have) or a bomb (I have)?

THe forces generated by the explosive power of a high-voltage/current arc can rival the power of a hand grenade or even some bombs.

And an arc contains massive amounts of heat energy, absent in most hand grenades and/or bombs.

Maybe I'm taking his statement the wrong way, but it comes off as if he's trying to downplay the magnitude of what happened.

Just ask the lineworkers involved.... [Linked Image]

I hope the young woman and her co-workers recover from this incident.


Stupid should be painful.
Re: Transformer Explosion #61515
01/27/06 04:42 PM
01/27/06 04:42 PM
L
Larry Fine  Offline
Member
Joined: Feb 2005
Posts: 693
Richmond, VA
He's probably never experienced a BLEVE either.


Larry Fine
Fine Electric Co.
fineelectricco.com
Re: Transformer Explosion #61516
01/27/06 07:10 PM
01/27/06 07:10 PM
N
NJwirenut  Offline
Member
Joined: Sep 2001
Posts: 806
Bergen County, NJ
Typical management twit.. [Linked Image]

Get out there, and put a corporate-friendly spin on things while the "disposable" workers go to the burn ward...

Re: Transformer Explosion #61517
01/27/06 07:34 PM
01/27/06 07:34 PM
renosteinke  Offline
Cat Servant
Member
Joined: Jan 2005
Posts: 5,316
Blue Collar Country
What, pray tell, is the difference between a fire and an explosion?

Every fire spreads at a given rate. Different things- fuel; oxygen, air pressure, etc...will affect this speed.
For example, even gunpowder burns at a rate so slow a man can easily out run it- IF the gunpowder is laying on the ground! But, contain that gunpowder in something that wll allow pressure to build up, and BOOM!

The "boom" is what we hear when the front of the flame is spreading faster than the spped of sound. A sonic boom. That's what separates a "fire" from and "explosion."

So, yes, an electrical fire can easily become an explosion.

Re: Transformer Explosion #61518
01/27/06 07:49 PM
01/27/06 07:49 PM
W
WFO  Offline
Member
Joined: Sep 2005
Posts: 202
Cat Spring, TX
Quote:
"He's probably never experienced a BLEVE either."

I hate to show my ignorance (although, actually, I'm getting quite good at it), but what is a BLEVE? I've been in this business since 1972 and never heard the term.

Re: Transformer Explosion #61519
01/27/06 07:59 PM
01/27/06 07:59 PM
S
stamcon  Offline
Member
Joined: Mar 2001
Posts: 330
So San Francisco CA


Steve
Page 1 of 2 1 2

Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
cookcc
cookcc
California ,Long Beach
Posts: 28
Joined: May 2007
Show All Member Profiles 
Top Posters(30 Days)
Admin 21
sparky 15
Potseal 15
Popular Topics(Views)
243,599 Are you busy
180,406 Re: Forum
170,869 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.027s Queries: 15 (0.004s) Memory: 1.0265 MB (Peak: 1.2032 MB) Zlib enabled. Server Time: 2018-01-23 13:45:45 UTC