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.
Utilization categories
According to IEC 60947-2, Utilization category of a circuit breaker shall be stated with reference to whether or not it is specifically intended for selectivity by means of an intentional time delay with respect to other circuit breakers in series on the load side under short-circuits conditions.
Utilization category A
Without an intentional short-time delay for selectivity under short-circuit condition and therefore without a short-time withstand current rating.
Utilization Category B
With an intentional short-time delay (which may be adjustable) provided for selectivity under short-circuit conditions. Such circuit-breakers have a short-time withstand current rating.
Refer the extract IEC document about the utilization categories.
Released for: Schneider Electric Egypt and North East Africa
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