Circuit Breaker Q&A

1.       What is Circuit breaker

2.       Why CB required

3.       How CB selected

4.       Different types of CB

5.       Data sheet of CB

6.       Name plate details of CB

7.       What is the voltage level required for CB trip coil

8.       List of CB manufacturers

9.       CB cost

10.   CB type tests

11.   CB routine tests

12.   Life of CB

13.   Why auxiliary contacts required for CB

14.   MCB name plate details

15.   How does MCB operates for over load and short circuit condition

16.   Why cost is more for higher KA for a CB

17.   MCCB vs MCB

18.   Min rating and max rating current rating and facult levels

a.       MCB

b.      MCCB

c.       ACB

d.      VCB

19.   Difference between ELCB and RCCB

Why ELCB is required in  a system