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

Cabels

List of topics:

1. Construction
2. Ratings

Skin effect,Corona effect,Proximity effect,

List of topics:

1. Advantage of high power factor
2. Insulators
3. String efficiency
4. Corona effect
5. Sag
6. Skin effect
7. Proximity effect

Voltage regulation

List of  topics :

1. % voltage regulation
2. Efficiency
3. Transmission line : Short,Medium,Long
4. Effect of power factor on TL

Load dispatch curve

List of  topics :

1. Load dispatch curve
2. Base load
3. Peak load
4. Interconnected system

Power factor

List of topics :

1. Power triangle
2. Cause of law power factor
3. Power factor improvement

Types of power plants

List of topics :

1. Various types of power plants
2. Various types of turbines
3. Fission & chain reaction
4. Definitions : Load curve,Diversity factor,PUF,Capacity factor,Load factor
                       Demand factor,Average load

DC generator characteristics

List of topics :

1. Separately excited
2. Self excited shunt generator
3. Self excited series generator
4. Compound generator

DC motor characteristics

List of topics :

1. Series motor

2. Shunt motor

3. Compound motor

Test on Transformers

List of topics :

1. Back to back test
2. Why xmer rated in kva?
3. Efficiency & regulation

Speed control of DC machines

List of topics :

1. Various methods of speed control

2. Breaking of motor

Test on DC machines

List of topics :

1. Brake test
2. Swinburn test
3. Hopkinson test

Synchronous motor

List of topics:

1. Staring of synchronous motor

2. Characteristics

3. Stepper motor

4. Switch reluctance motor

Transformer

List of topics:

1. Working principle

2. Types

3. Construction

4, Equation

5. Test

Induction motor

List of topics:

Single phase induction motor
1. Why induction motor is not self started?
2, How to make induction motor self starting

Types motor

List of topics:

Basic working principle of
1. Repulsion motor
2. Universal motor
3. Reluctance motor
4. Hysteresis motor

Altenator

List of topics :
1. Overview of construction
2. Damper winding
3. Voltage regulation
4. Chording angle

Losses in the DC machine

List of topics :

1. Classification
2. Detail of Iron losses

DC motor

List of topics :

1. Back emf

2. Equation of motor (i) power equation (ii) torque equation

3. voltage regulation

DC generator

Important terminologies used in the DC generator are defined in very short.

List of  terminology one can find in the image:

1.Pole pitch    2.Coil pitch    3.Full pitch    4.Pitch of a winding    5.Front pitch

6.Back pitch  7.Resultant pitch    8.Lap winding    9.Wave winding

10.EMF equation for generator

Basic electronics

CONDUCTOR : Materials in which electron can move freely at room temperature are called conductor
e.g. Copper,Aluminium,Iron etc

                                            BLUE PART: CONDUCTION BAND
                                            RED PART: VALANCE BAND
                                            BLACK PART: FORBIDDEN ENERGY GAP
INSULATOR : Materials in which electrons can not move freely at room temperature are called insulator
e.g. Wood,Plastic etc

        

SEMICONDUCTOR :Materials which act as insulator at room temperature but act as conductor in specific condition (environment) called semiconductors
e.g. Germanium,Silicon etc

P-Type material :When trivalent impurity is added to pure semiconductor material,then it will create one hole in the valance band,this material is called as p-type material
N-Type material :When pentavalent impurity is added to pure semiconductor device then it will create one electron in the valence band, this material is called as n-type material
Doping : The process by which impurity is added to pure semiconductor material is called as doping