DC Circuit Breaker - Selection of Low Voltage Circuit Breaker Type The type of circuit breaker is selected based on the rated current of the circuit, the protection requirements, and the structural characteristics of the circuit breaker.

E.g: 

1 For the rated current of 600A or less, if the short-circuit current is not large, the plastic case type circuit breaker is generally used;

2 If the rated current is relatively large, the universal circuit breaker should be used; if the short-circuit current is quite large, the type of current limiting circuit breaker should be selected:

3 When there is leakage protection requirement, the leakage protection type circuit breaker should also be selected.

It should be noted that in recent years, the rated current level of plastic case circuit breakers has been continuously improved, and many large-capacity plastic case circuit breakers have appeared. For the universal circuit breakers, due to new technologies and new materials. Application, volume and weight are also decreasing.

From the current situation, if the selection is selective, the universal circuit breaker should be used; if the focus is small and the price is cheap, the plastic case circuit breaker should be used.