Can someone explain incident energy normalized, what is it and how it is obtained .Utilizing the Incident Energy at Working Distance -Empirically Derived Equation -NFPA 70E-D4.3, En = incident energy normalized. E= 4.184* Cf * En (t/0.2) (610/D) ^x Thanks. READ ANSWER
Hi all. I have a pad mounted transformer with internal primary side 15KV rated fuses. There are two types in series. One is an expulsion fuse GE# 9F54WLD303 and one is an oil submersible protector (OSP) GE # 9F59TCD150. I don’t have them in my SKM library. I asked SKM for them and they sent me new .lib files for these but would not guarantee them. After merging them into my library and adding them to the model I don’t
People seem to love to watch videos of electrical explosions. One type of failure is when a protective device is applied beyond its interrupting rating and catastrophically fails (explodes) when it has to interrupt a short circuit. Although this does not happen for every overdutied device, it could happen. That is the main reason for performing a short circuit study – to identify these types of deficiencies so they can be corrected. So with that intro, here is this week’s
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