Types of Relay

List of topics :

1.Working principle
2. Types of relay
3. Electromagnetic induction/attraction type relay
4. functional relay

Air blast CB,SF6 CB, Vacuum CB

List of topics:

1. Air blast circuit breaker
   (i) Axial air blast circuit breaker
   (ii) Cross air blast circuit breaker
   (iii) Radial air blast
2. SF6 circuit breaker
3. Vacuum circuit breaker

Oil circuit breaker

List of topics:

1. Classification
2. Bulk oil circuit breaker
3. Law oil circuit breaker
4. Plain break oil circuit breaker
5. Arc control oil circuit breaker
6. Self blast/Force blast oil circuit breaker
7. Plain explosion oil circuit breaker

Arc extinguish methods

List of topics:

1. Principle
2. Arc voltage
3. Arc extinguish methods
4. Restriking voltage
5. Recovery voltage

Distribution system

List of topics:

1. Feeder
2. Radial system
3. Ring main system
4. Interconnected system
5. DC distribution

circuit breaker basics

List of topics:

1. Bushings
2. RRRV
3. Current chopping
4. Breaking capacity
5. Making capacity
6. Short time rating
7. Fuses
8. Pick up current
9. PSM

Substation S/S

List of topics:

1. Classification of substaion
2. Busbar,Isolator,Isolating switch
3. Switchger, Short circuit,Unsymmetrical fault,% rectance