Study of Circuit breakers

 

Miniature Circuit breaker-63A

MCB used when overload protection and short circuit protection 

Overload limit and time in circuit break is mentioned on MCB 

C10

C type 

10 current -10A

Types of MCB

B type (3-5)timesFull load current OT 0.04-13sec -used in home's 

C type(5-10 )times the Full load current 0.04-5sec-commercial and industrial use

D type (10-20) times the Full load current-0.04-3sec-high starting current motor 

K type (8-12)times the Full load current,  less than 0.1sec battery charger exchange machine 

Z type (2-3) times the Full load current ,less than 0.1second -semiconductor 

Interrupting current rating-18kA

SP,DP,TP,FP..

MCCB-moulded case Circuit breaker - 100 upto1000A-TP,FP 

Commercial use

MCCB is used for overload and short circuit for protection and shunt tripping 

ELCB-earth leakage 

RCCB -Overload and earth leakage -used as shock protection