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Improving Electrical Safety with Short Circuit Protection - Arc Flash Considerations

  • New incident energy equations in the 2018 edition of IEEE 1584 may provide different results than existing arc flash studies. Learn what “electrode configuration” means for the data collection step of your next analysis. Learn the new technique available to take advantage of the current limiting ability of modern-day fuses.
  • Learn why NFPA70E dropped the 240V exception for arc flash analysis 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.
  • Do some of your circuits have incident energies greater than 1.2 cal/cm2 even when protected by dual element Class RK1 or J fuses? Or Class L. Learn what options you have to lower energies to “Category 0” Level.
  • Review a simple primary fuse change that can help lower energies to below “Category 3” PPE levels at substations that have incident energies much greater than 40 cal/cm2.
  • New information will be presented on coordination between fuses and upstream circuit breakers in the ‘short circuit’ region to address issues that can arise as settings of upstream devices are lowered to reduce arc energies.
  • Can your storeroom enhance your electrical safety program? Review a simple “5S” program to ensure safe fuse replacements.


This course is broken down into two hour-long sessions. You will need to register for the parts you plan to attend, email confirmations will include the webinar access information.

Part 1 - August 19th

  • Hazards of Overcurrents
  • Importance of Adequate Short Circuit Ratings
  • Enhancing Short Circuit Safety with Current Limiting Fuses

Part 2 - August 20th

  • Brief Review of Short Circuit Safety with Current Limiting Fuses
  • Protecting Against Arc Flash Hazards
  • Arc Flash Hazard Analysis - Concepts & Updates
  • Addressing High Arc Energy Problems
  • Choosing a U/L Class as a Standard

Course Details

  1. Duration: 1 Day(s)
  2. Cost: Free

More Course Information


Webinars - Mersen - Session 2 08/20/2020 Start Time: 10:00 Contact Register

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