Improving Electrical Safety With Short Circuit Protection


  • New incident energy equations in the 2018 edition of IEEE 1584 mayprovide different results than existing arc flash studies. Learn what“electrode configuration” means for the data collection step of yournext analysis. Learn the new technique available to take advantage ofthe current limiting ability of modern-day fuses. 
  • Learn why NFPA70E dropped the 240V exception for arc flashanalysis and what the change to IEEE1584-2018 will require.• Gain insight into what is meant by “exposed to the arc flash hazard”and who may be affected.
  • Review strategies for improving short circuit safety and minimizingrisk 
  • Do some of your circuits have incident energies greater than1.2 cal/cm2 even when protected by dual element Class RK1 or Jfuses? Or Class L. Learn what options you have to lower energies to“Category 0” Level. 
  • Can your storeroom enhance your electrical safety program? Review asimple “5S” program to ensure safe fuse replacements.


PART 1 (Course W101 - 60 Minutes)

  • Hazards of Overcurrents 
  • Electromagnetic Force• Heat 
  • Arc EnergyImportance of Adequate Short Circuit Ratings 
  • SCCR 
  • AIR• High Fault Current RatingsEnhancing Short Circuit Safety with CurrentLimiting Fuses 
  • Current limiting Performance andAdvantages• Fuses for optimum short circuit protectionof equipment and components 
  • Dual Element, Time Delay, or Fast Acting? 
  • Fuses for minimizing arc flash hazards 
  • Choosing a U/L Class as a Standard

PART 2 (Course W102 - 60 Minutes)

  • Brief Review of Short Circuit Safety withCurrent Limiting Fuses
  • Current limiting Performance andAdvantages• Fuses for optimum short circuit protectionof equipment and components 
  • Minimizing arc flash hazardsProtecting Against Arc Flash Hazards 
  • Overview of Arc Flash hazards• Factors affecting Arc Flash energies 
  • Update on NFPA 70E• to the arc flash hazard...?• Risk Assessment Concepts 
  • Hierarchy of Risk Controls• Hazard Analysis DiscussionArc Flash Hazard Analysis – Concepts andUpdates• Introduction to IEEE 1584 
  • New IEEE 1584 Equations 
  • New approach for current limiting fuses
  •  Guidelines for 208V 
  • Overview of the ten steps of an arc flashhazard analysisAddressing High Arc Energy Problems 
  • Reducing Arc Flash energy withcurrent-limiting fuses• Addressing high energy / low fault currentcircuitsChoosing a U/L Class as a Standard 
  • Safety and protection considerations 
  • Strategies for 5S-ing your fuse inventoriesand replacement systems


Mike Lang, Principal Field Engineer for Mersen, has participated in over1,000 arc flash tests in Mersen’s high power test lab as leader of theMersen arc flash team. He has coauthored several prize-winning IEEEpapers on arc flash including papers at the 2006 PCIC Conference, the2008 PPIC Conference and 2016 PPIC Conference. He was also awardedthe 2011 I&CPS Ralph H. Lee Department Prize Paper Award for his workon 208V arc flash research. He recently received the 2018 Technical Awardfor Excellence in Prevention Through Design by the Electrical SafetyCommittee of the IEEE Industrial Application Society. 

Mike is currently co-chairman of the IEEE/NFPA Collaboration on ArcFlash Research effort and has served as a member of the Research, Testand Planning Committee and on the Technical Advisory Committee as partof Mersen’s Platinum sponsorship of the Collaborations research. Mike isan active member of the IEEE 1584 Working Group.

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4/20/2021 11:00:00 AM

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