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Browse all discussions Latest Posts. Reviews Files Photos Videos. Latest blog posts Find a Blog. Discussions H Ask the Commun Log in to the online community. Want to post a reply? You'll need to log in. Graeme Robertson. The way that I interpret it is that the busbar short time RMS fault rating usually 1 or 3s is equivalent to Ik value, and not I"k - am I correct?.
Jul ' Post Date Post Date Likes. Alasdair Anderson. However the principles are the same and I offer the below based on my experience. The first question is why do you interpret the busbar short time RMS fault rating as equivalent to Ik? The stress, heating, etc.
I would therefore expect the busbars to need a short time RMS fault rating as higher than Ik though not necessarily as high as I"k in terms of heating. The fault current at the switchboard is also critical in choosing the correct switchgear.
The circuit breakers should operate well before the short time period of the busbar rating so it is critical to know what current they have to interrupt, which is more likely to be the value of I"k than Ik. I hope this helps, but if anyone has anything to add or disagree with I would be interested to hear. Log in. Powered by Personify Community.
Would you like to tell us about a lower price? If you are a seller for this product, would you like to suggest updates through seller support? Outlines procedures for calculating short-circuit currents that may occur on a marine or offshore a. The calculation methods are for use on unmeshed three-phase alternating current systems. This standard cancels and replaces IEC , published in Read more Read less.
IEC 60364-8-1 standard : Energy Efficiency in low-voltage electrical installations
IEC Electrical Installations for Buildings is the International Electrotechnical Commission 's international standard on electrical installations of buildings. The latest versions of many European wiring regulations e. National codes and site guides are meant to attain the common objectives of IEC , and provide rules in a form that allows for guidance of persons installing and inspecting electrical systems. From Wikipedia, the free encyclopedia. This article includes a list of references , related reading or external links , but its sources remain unclear because it lacks inline citations. Please help to improve this article by introducing more precise citations.