HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
William K.
User Rank
Platinum
No Arc flash problems
William K.   10/29/2013 9:20:18 PM
NO RATINGS
One of the very major causes of accidental arc flash is that the people in the area did not really understand what they were doing. NOT in regard to arc flash protection, but they did not fully understand what the task involved to be done safely. I relize that this flys full in the face of a number of groups that claim that any individual can do any task, and if they fail it is somebody else's fault for not training them.

Accidental arc flash is separated from equipment failure arc flash in this area because equipment failure arc flash may also happen when nobody is doing any work related to the system creating the flash. Of course it does include faults caused by incorrect assembly of components at some previous time. But equipment failure arc flash can injure a passerby who was not involved at all.

And there are mechanisms available to provide a higher impedance to the very fast current rise that is charateristic of arc flash, and also the source of many of it's damaging effects. The mechanism is in the process of being patented, which is all that I can divulge about it. But it does work, I have seen the videos.

rhayashi
User Rank
Silver
Prevent ARC FLASH
rhayashi   10/29/2013 6:46:29 PM
NO RATINGS
This is a bad title. try again please.

Ann R. Thryft
User Rank
Blogger
Re: Eyesight can be damaged, too
Ann R. Thryft   10/29/2013 4:07:35 PM
Thanks for that info, Stewart. I will share it with him (and hope he uses it!).

Steward Hudson
User Rank
Blogger
Re: Eyesight can be damaged, too
Steward Hudson   10/29/2013 3:52:25 PM
NO RATINGS
I will try to share more about Arc Flash, here is another small thing that we did to educate people with Arc flash Hazard

http://visual.ly/5-extremely-surprising-arc-flash-facts

Ann R. Thryft
User Rank
Blogger
Re: Eyesight can be damaged, too
Ann R. Thryft   10/29/2013 3:44:43 PM
NO RATINGS
Thanks for replying, Stewart. I didn't know that stat, but I did know how serious even short exposure can be. My heart went in my throat when he told me. He's being pretty nonchalant about it, although he went through a lot of pain in the doctor's office with whatever drops they used to treat him. Thanks for your good wishes. I'm amazed, and unhappy, about the lack of standards and guidelines.

Steward Hudson
User Rank
Blogger
Re: Eyesight can be damaged, too
Steward Hudson   10/29/2013 3:21:18 PM
NO RATINGS
Agree!

95% of people struck by arc flash end up with permenant eye sight loss. Despite the guidelines provided by OSHA, industries and business owners have not created any specific safety guidelines within their facilities to protect and to safe their workers.

I hope all the good things for you newphew.

Ann R. Thryft
User Rank
Blogger
Eyesight can be damaged, too
Ann R. Thryft   10/29/2013 1:59:11 PM
NO RATINGS
Thanks for writing about this problem. My 24-year-old nephew, who's done a fair amount of welding maintaining and repairing the heavy lifting equipment he operates for his job, recently told me about an arc flash accident where nothing got damaged except his eyesight (temporarily it seems) since for some reason he wasn't wearing goggles. Naturally, I gave him a lecture about it, but what really surprised me was the lack of controls in place at his workplace. No one was insisting he wear goggles, and of course he wasn't experienced enough to realize how bad the hazard can be.

Philip Oakley
User Rank
Silver
Re: One More
Philip Oakley   10/29/2013 9:25:25 AM
It's better that the circuit is dead, rather than becoming a dead engineer.

It's interesting to compare the US and UK/European approaches to achieving safety. In the UK the use of personal protective equipment is a *last* resort (at least it's meant to be). That is particulalrly true when the consequences of an incident can be so high. The authorities would ask why the circuit wasn't made dead first.

Good equipment design, as you say, to divert any arc flash is also important when PPE can be cumbersome and ignored.

 

Nancy Golden
User Rank
Platinum
One More
Nancy Golden   10/29/2013 12:14:25 AM
Great article although I would add one more thing to the list:

Although this may fall under neccesary preventative measures since it should be in place up front to prevent occurences, I am just being a bit more specific: Design and equipment configuration choices that reduce arc flash hazard.

 



Partner Zone
Latest Analysis
Last year you helped Design News and Allied Electronics crown its first-ever Gadget Freak of the Year, and we need your help again. Vote in round 2 of our second-annual contest.
The key to autonomous driving is not to forget about the driver, and to remember that passengers want a sense of control, as opposed to being utterly passive backseat drivers.
HP revealed more of its 3D printing plans in a recent webinar. Senior vice president of inkjet and graphics solution business Stephen Nigro spoke about how the technology works and expanded on HP's vision of open collaboration to commercialize its Multi Jet Fusion 3D printing technology for end-production, and open collaboration on new materials. He also said HP will create software to help users decide when to use Multi Jet Fusion versus conventional subtractive manufacturing.
Get a load of these strange product designs. What's in the water these design engineers are drinking?
The Dutch are known for their love of bicycling, and they’ve also long been early adopters of green-energy and smart-city technologies. So it seems fitting that a town in which painter Vincent van Gogh once lived has given him a very Dutch-like tribute -- a bike path lit by a special smart paint in the style of the artist's “Starry Night” painting.
More:Blogs|News
Design News Webinar Series
11/19/2014 11:00 a.m. California / 2:00 p.m. New York
11/6/2014 11:00 a.m. California / 2:00 p.m. New York
10/7/2014 8:00 a.m. California / 11:00 a.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Dec 1 - 5, An Introduction to Embedded Software Architecture and Design
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Last Archived Class
Sponsored by Littelfuse
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service