How To Choose A, B, C, And D Types of Miniature Circuit Breakers? (2)

2. Whether the C-type circuit breaker is suitable for the motor circuit

We all know that C-type micro-breaks are used in common circuits, such as lighting circuits. D-type circuit breakers are used in power circuits such as motors. So, can the C-type micro-break be used in the motor circuit?

Let's take a look at the difference between C-type and D-type micro-breaks:

Type C micro-break: Contains overload protection and short-circuit protection, and the short-circuit protection tripping value is 5 to 10 times the rated current.

D-type micro-break: Contains overload protection and short-circuit protection, and the short-circuit protection tripping value is 10 to 20 times the rated current.

The overload protection of the two is the same, the difference is only the tripping range of the short-circuit protection.

Usually, ordinary loads have no starting current, that is, the starting current is the rated current; the starting current of the motor is about 7 to 10 times the rated current.