Short Circuit Overdutied Equipment

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wbdvt

Senior Member
Location
Rutland, VT, USA
Occupation
Electrical Engineer, PE
I have run into a situation where some power correction units are overdutied. The manufacturer has rated them at 10kA whereas the available fault current is around 29kA at 480V. I am thinking that I may be able to continue using these if current limiting fuses are installed upstream.

Looking for thoughts/opinions.

Thank you in advance.
 

petersonra

Senior Member
Location
Northern illinois
Occupation
engineer
I have run into a situation where some power correction units are overdutied. The manufacturer has rated them at 10kA whereas the available fault current is around 29kA at 480V. I am thinking that I may be able to continue using these if current limiting fuses are installed upstream.

Looking for thoughts/opinions.

Thank you in advance.

Interesting. I don't think UL508a requires capacitors to have a SCCR.
 
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