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This FAQ has been written for NEAL (North East Africa and Levant) region. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.

What is the Icw rating for Compact NSX MCCBs?

We have no Icw (rated short-time withstand current) values for the NSX up to 630A. These devices have an utilization category A according IEC 60947-2 standards which means that they are not specifically intended for selectivity under short-circuit conditions with respect to other short-circuit protective devices in series on the load side. And as per IEC 60947-2, Icw not required for the utilization category A MCCBs and it only exists for utilization category B circuit breakers.