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Launch of our new factfile on arc flash risk management

Former Community Member
Former Community Member

We published a new factfile on Arc flash risk management.

e44cfbb534ed373d69072e74a6988bf1-huge-arc-flash-risk-management-fact-file---front-cover_page_01.jpg

This factfile seeks to set out the key principles of arc flash risk management using a risk-based approach. It is aimed at persons with responsibility for the management of safety in the control and implementation of work on electrical power equipment. This factfile provides an assessment process and there is also a commentary on recognised standards and test methods for PPE in Appendix 2.

We are interested in your thoughts! Please read our factfile and ask any questions or share your thoughts below.

 

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    arc flash temperatures of between, perhaps sometimes exceeding, 2800 and 19000 deg C.

    well yes, probably 20,000- 50,000 depending on electrode material and arc draw, but so what ? 

    The important energy density and temperature rise is at the victim, not the arc.

    The temperature of the skin after the flash event at the threshold of permanent damage should be well below 100C or skin will be burnt through.

    (5 joules per cm2 is normally taken as the metric boundary for permanent scarring, close to the 1.2 cals seen in US literature) 

    Even for clothing the final temperature will need to be kept below  some hundreds of  C, or the fabric will be suffering either spontaneous ignition or pyrolysis, causing further problems, hence a typical  energy density limit for PPE of perhaps 20 times that of the bare skin case.

    Mike

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  • 0

    arc flash temperatures of between, perhaps sometimes exceeding, 2800 and 19000 deg C.

    well yes, probably 20,000- 50,000 depending on electrode material and arc draw, but so what ? 

    The important energy density and temperature rise is at the victim, not the arc.

    The temperature of the skin after the flash event at the threshold of permanent damage should be well below 100C or skin will be burnt through.

    (5 joules per cm2 is normally taken as the metric boundary for permanent scarring, close to the 1.2 cals seen in US literature) 

    Even for clothing the final temperature will need to be kept below  some hundreds of  C, or the fabric will be suffering either spontaneous ignition or pyrolysis, causing further problems, hence a typical  energy density limit for PPE of perhaps 20 times that of the bare skin case.

    Mike

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