Power circuit breaker ratings explained

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When selecting the right low voltage power circuit breaker for an application, it is important to consider both short-circuit current ratings and short-time current ratings. Understanding these performance characteristics will help you choose between the various circuit breaker designs.

A circuit breaker is selected based on its electrical ratings to serve a particular purpose in each application, proper selection of the circuit breaker is essential for the safe and correct operation of the electrical system. Two important ratings to consider are; short-circuit current rating (this is commonly referred to as the maximum interrupting rating) and the short-time current rating. In this post, we will discuss these circuit breaker ratings and how they can affect the protection and selective coordination of the system. Continue Reading