Obsolete Industrial

What is an E-rated Fuse?


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  • I change too many fuses
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What is an E-rated Fuse?
« on: January 18, 2016, 03:56:AM »
I have a few questions for the maintenance panel here. First of all, what is an E-rated fuse? One of my colleagues was discussing some technical things about fuses and now he has me wondering.

--- E-Rated Fuses ---

« Last Edit: January 18, 2016, 03:58:AM by fuse_puller »
Thanks for your input!!!

You should never change the same fuse more than once in the same day...


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Re: What is an E-rated Fuse?
« Reply #1 on: February 08, 2016, 04:28:AM »
Again, I actually went researching for E-rated fuses...

E-Rated fuses are designed for use with transformers, power centers, and sub-stations. They are essentially a time delay fuse.

The NEMA Standards for E-rated fuses are as follows: They require that fuses open within 300 seconds when exposed to an RMS value of 200-240% of the fuse's current rating. It translates to a time delay fuse that is capable of an extended period of excessive current.
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