Most circuit breakers have two tripping technologies in them which makes the trip curve charts difficult to read. There is a magnetic trip curve for short circuit protection which is where the B, C, and D come from and there is a thermal trip curve which is for our longer duration overload events.
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Items used in this video:
Circuit Breaker [ Ссылка ]
Good resources to learn more about circuit breakers:
Fundamentals of Overcurrent Protection Circuit Breakers [ Ссылка ]
Circuit Breakers UL1077 vs UL489 and tripping technologies [ Ссылка ]
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