by Jeff Kershner | Mar 3, 2020 | Case Studies, Featured articles
Maximum Available Fault Current… What is it? Have you ever noticed “Interrupting Rating” on the front of a breaker? Take a look at the highlighted area of the 60A breaker picture below: If this breaker were operating at 600V it has an interrupting... 
by Jeff Kershner | Nov 18, 2019 | Case Studies
What causes an arc flash to be big or small? We calculate arc flash “size” by following the equations described in IEEE 1584 2018. These equations are based on real life testing and measuring of arc flashes. Below is a simple explanation of what can cause... 
by Jeff Kershner | Feb 18, 2018 | Case Studies
What is clearing time? Ok, you’ve completed your arc flash study and now all your electrical equipment is affixed with arc flash hazard warning labels. You may notice that the incident energy values are different from one piece of equipment to the next. How can... 
by Jeff Kershner | Jan 5, 2018 | Case Studies
A potential customer called into our engineering department one day from the middle of Iowa. “I was just told by a fuse salesman that if I buy his arc flash fuses that I don’t have to worry about arc flash in my facility”. (The idea is that “arc flash... 
by Jeff Kershner | Jan 5, 2018 | Case Studies
Rozel trains your employees how to work on electrical equipment safely, but what about your contractors? You can’t train your contractors and you can’t always watch them but you can hold them accountable. Our travels took us to the motor city. During an... 
by Jeff Kershner | Jan 5, 2018 | Case Studies
We conducted an arc flash evaluation on a factory, almost a million square feet and nine main transformers supplying up to 30MVA of power! The final report we issued identified large potential incident energies on four switchgear. Not only was the main feed a high... 
