{"searchBar":{"inputPlaceholder":"Search by keyword or ask a question","searchBtn":"Search","error":"Please enter a keyword to search"}}
{}

Welcome to the Schneider Electric Website

Welcome to our website.

Select your location

Welcome the the Schneider Electric French website. It looks like you are located in the United States, would you like to change your location?

Traduisez en francais
{"support":{"yesButton":"yes","noButton":"no","feedback":{"title":"What can we do to improve?"},"submitButton":"Submit","successMessage":"Thank you for your feedback","title":"Was this helpful?","feedbackPercentLabel":"of people found this helpful","captcha":{"error":"Please tick the box"}}}
Search FAQs

What is the difference between Utilization categories A and B in circuit breaker classification.

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.
Explore more

Can't find what you are looking for?

Reach out to our customer care team if you have any questions or need more technical support.
Explore more