1.Application

DZ47-63(C45N) Series circuit breaker is used in lighting distribution system or motor distribution system for overload or short circuit protection in the system. The product is neoteric in structure, light in weight, reliable and excellent in performance, it has high breaking capacity, can trip quickly, and its case and items adopt high fire-resistant and shockproof plastic. The product with long life, is mainly used in AC 50/60HZ single pole 240V or two, three, four pole 415V circuit for overload and short-circuit protection as well as for unfrequent on and off switching electrical equipment and lighting circuit in normal condition.

2.General  

1.General rules for choosing MCB.

 a.Technical date of the network at the point considered:

The earthing systems,short-circuit current at the circuit breaker installation point,which must always be less than the  breaking capacity of this device,network normal voltage.

 b.There are 3 Curve characteristics for magnetic peration:

    B curve (3-5 ln) protection and control of the circuits against length cables in TN and IT systems

    C curve (5-10 ln) protection and control of the circuits against overloads and short-circuit; protection for resistive and inductive loads with low inrush current.

    D curve (10-14 ln) protection and control of the circuits against overloads and short-circuit; protection for circuits which supply  loads with high inrush current at the circuit closing (LV /LV transformers,breakdown lamps)

3.Curves 

4. Main Technical Parameter

Rated current: 1A,2A,3A,4A,6A,10A,16A,20A,25A,32A,40A,50A,63A

Rated frequency: 50/60HZ

Magnetic release operate:

B curve: Between 3In and 5In

C curve: Between 5In and 10In

D curve: Between 10In and 14In

Mechanical life(O-C): No less than 20000 operations

Electrical life: No less than 6000 operations.

5.Temperature derating