UNIT III

Circuit Breaker

Q1) What is a circuit breaker? Classify it.

Q2) Explain Different rating of circuit breaker.

Q3) What are the types of circuit breaker?

Q4) Define Making capacity and Breaking capacity of the circuit breaker.

Q5) What are the characteristic of SF6 gas?

Q6) Explain construction & working of SF6 circuit breaker.

Q7) Explain construction & working of Air circuit breaker.

Q8) Explain construction & working of Vacuum circuit breaker.

Q9) Write a note on Auto reclosing.

Q10) What are the advantages and disadvantages of SF6 circuit breaker?

Q11) What are the advantages and disadvantages of vacuum circuit breaker?

Q12) What are the advantages and disadvantages of Air circuit breaker?