Oral Questions For Switchgear and Protection

Oral Questions For Switchgear and Protection 

Unit no 3
Name of Unit CIRCUIT BREAKER                  

1. Explain the different ratings of C.B?
2. Explain the following terms with respect to circuit breaker?
3. Breaking capacity
4. Making capacity
5. Classify the circuit breaker?
6. Explain SF6 C.B. with their advantages?
7. Explain Puffer C.B?
8. Explain Vaccum CB ? with their advantages ?
9. Explain ABCB?
10. Explain Auto Reclosing?

Unit no 4
Name of Unit Static and digital Relaying

1. Explain numerical ralays. Also state its advantages and disadvantages.
2. Explain Static relays. Also state its advantages and disadvantages.
3. State and explain the sampling theorem. Also explain anti-aliasing filter.
4. Compare static relays with electromechanical relays with respect to construction, working principle , advantages and limitations.
5. Draw & explain block diagram of PMU.