Protection and Switchgear
- Lecture Notes, Study Materials and Important questions answers

Subject : Protection and Switchgear

PROTECTION SCHEMES

1. Fundamentals of Power System Protection - Answer (click here)
2. Consequences of occurrence of Faults - Answer (click here)
3. Zones and types of Protection system - Answer (click here)
4. Protection System Requirements and some basic terminologies used - Answer (click here)
5. Protection against over voltages due to lightning and switching - Answer (click here)
6. Arcing Grounds - Answer (click here)
7. Surge absorber - Answer (click here)
8. Surge diverter - Answer (click here)
9. Types and Method of Neutral Earthing in Power Distribution - Answer (click here)

ELECTROMAGNETIC RELAYS

1. Types of Electromagnetic Relay - Answer (click here)
2. Over Current Relay: Working Principle and Types - Answer (click here)
3. Directional Over Current Relays - Answer (click here)
4. Distance relay - Answer (click here)
5. Impedance Relay - Answer (click here)
6. Differential Relay - Answer (click here)
7. Static relays - Answer (click here)

APPARATUS PROTECTION

1. Over current and earth fault protection - Answer (click here)
2. Transformer Protection - Answer (click here)
3. Buchholz relay: Operation, Advantages, Applications - Answer (click here)
4. Generator protection - Answer (click here)
5. Protection of bus bars - Answer (click here)
6. Zones and types of Protection system - Answer (click here)
7. Current Transformers(CT)s and Potential Transformer(PT)s and their applications in protection schemes - Answer (click here)

STATIC RELAYS AND NUMERICAL PROTECTION

1. Formation of arc during circuit breaking - Answer (click here)
2. AC and DC circuit breaking - Answer (click here)
3. Restriking voltage and recovery voltage - Answer (click here)
4. Rate of rise of recovery voltage - Answer (click here)
5. Resistance switching - Answer (click here)
6. Current Chopping - Answer (click here)

CIRCUIT BREAKERS

1. Rating of Circuit Breaker - Answer (click here)
2. Air blast circuit breaker: Working principle, Advantages, Disadvantages - Answer (click here)
3. Oil circuit breakers: Types, Construction, Operation, Advantages, Disadvantages - Answer (click here)
4. SF6 circuit breaker: Construction, Operation, Advantages, Disadvantages - Answer (click here)
5. Vacuum circuit breakers: Construction, Operation, Advantages, Disadvantages - Answer (click here)
6. Testing of circuit breakers - Answer (click here)