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Arc Flash Size

Arc Flash Size

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...
“Arc Flash Fuses”

“Arc Flash Fuses”

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...
Holding Contractors Accountable

Holding Contractors Accountable

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...
Catastrophe Avoided

Catastrophe Avoided

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...