Different kinds of current ratings of circuit breaker.

Current Ratings of Circuit Breaker 

Several current ratings are used to describe a circuit breaker's ability to transport current, including In, ICS, ICU, and ICW. 

An overview of each rating is provided below.

1- In (Nominal Current)

The nominal current rating of a breaker is referred to as the "In" current of the breaker. It is the maximum continuous current that the breaker can support without tripping or getting damaged. The manufacturer normally specifies the nominal current rating, also known as the ampere rating, and prints it on the breaker's label.

A 50A breaker, for instance, has a nominal current rating of 50 amps, which means it is made to withstand a maximum current of 50 amps without tripping or breaking. To prevent an overload that could damage the circuit or pose a fire hazard, the breaker will trip if the current exceeds 50A.              Selecting a breaker with the proper nominal current rating is crucial for

2- The ICU (short-circuit withstand rating or Ultimate current rating) rating identifies the highest fault current that a circuit breaker can safely interrupt without sustaining personal injury. The term "short-circuit withstand rating" is sometimes used. Icu is a designed current rating of breaker 

 

3- The term "ICS" (service breaking capacity) refers to a rating that describes the highest fault current that a circuit breaker may interrupt under typical operating circumstances without sustaining any harm. The service breaking capacity is another name for it.

 

 

3- The ICW (withstand current rating) rating indicates the maximum current that a circuit breaker can sustain for a brief period of time without suffering harm. Another name for it is