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is designed for household and similar domestic installations. It assumes the equipment will be operated by un-trained users (household occupants) and covers Miniature Circuit Breakers (MCBs) with a maximum rating of 125 A.
A higher level of performance where the breaker must be able to return to normal operation after interrupting a fault current. It is expressed as a percentage of Icu (e.g., 50%, 75%, or 100%). 2. Utilization Categories The standard classifies breakers into two categories: iec 60947-2 pdf
Circuit breakers specifically intended for selectivity under short-circuit conditions. is designed for household and similar domestic installations
The standard classifies circuit breakers into two primary "Utilization Categories" to define their performance during short circuits: Utilization Category A iec 60947-2 pdf