Why do companies still insist on installing products that de-rate their switchgear?

Posted by Martin Robinson on 4/1/15 4:11 PM

I am amazed when I still see companies fitting crystal infrared (IR) inspection windows into their 1kV and above electrical switchgear,  IEEE C37 20.2.a.3.6 clearly mandates that all visual viewing windows irrespective of size, shape or material undergo an impact and load test, and as we know all fluoride based IR windows cannot pass any form of impact test!

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Topics: Arc Flash, Infrared Windows, Current News, de-rating, switchgear

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