engineering recuitment DRDO Technician A 2022 Mock Test Series (Tier I) Power Systems Circuit Breakers Classification of Circuit Breakers
Which of the following is NOT an advantage of SF6 circuit breaker?
1
SF6 breaker are economical
2
Minimum maintenance required for this breaker.
3
The size of SF6 breaker is smaller than conventional circuit breaker of the same rating.
4
Problems connected with current chopping are minimum