Tripping Characteristics Of Miniature Circuit Breakers

The circuit breaker tripping characteristics are divided into A, B, C, D, K and other types, and their respective meanings are as follows:
Type A tripping characteristics: the tripping current is (2~3) In, which is suitable for protecting semiconductor electronic circuits, measuring lines with small power transformers, or systems with long lines and small short-circuit currents;
Type B tripping characteristics: the tripping current is (3~5) In, which is suitable for household power distribution systems, protection of household appliances and personal safety protection;
Type C tripping characteristics: the tripping current is (5~10) In, which is suitable for protecting distribution lines and lighting lines and motor circuits with higher connection currents;
Type D tripping characteristics: the tripping current is (10~20) In, which is suitable for protecting equipment with very high impact currents, such as transformers, solenoid valves, etc.;
Type K tripping characteristics: with 1.2 times the thermal tripping action current and 8~14 times the magnetic tripping action range, it is suitable for protecting motor line equipment and has a higher impact current resistance capability