Table of Contents
The Sub Engineer (Electrical) post in the Kerala State Electricity Board Limited is tested through a 100-mark objective paper made of six modules. To score well you need notes that are short, clear and built on the syllabus. These KSEB Sub Engineer electrical study notes 2026 follow the detailed Kerala PSC syllabus module by module. Each module has key concepts, important formulas, comparison tables and exam pointers. Use them for first-time reading, quick revision and last-week brushing up.
How to Use KSEB Sub Engineer Electrical Study Notes 2026
- Read the notes after you have studied the topic from a textbook once. They are revision notes, not a replacement for concepts.
- Make your own one-page formula sheet from each module.
- Practise 10 to 15 numericals for every numerical topic.
- Test yourself with module-wise quizzes on the Entri app.
- Revise each module at least three times before the exam.
KSEB Sub Engineer (Electrical) Exam 2026 – Module-Wise Marks
1: Between the period of 1858-1947, how many Viceroys ruled over India?
| Module | Subject Area | Marks |
|---|---|---|
| Module I | Basic electrical engineering, network theorems, electromagnetism, instruments, materials | 16 |
| Module II | Power systems, transmission and distribution, protection, traction, energy sources | 20 |
| Module III | Measurements, wiring and illumination | 16 |
| Module IV | Electrical machines | 16 |
| Module V | Analog and digital electronics | 16 |
| Module VI | Power electronics, microprocessors, automation | 16 |
| Total | 100 |
Prepare for Kerala PSC Technical Exams with Entri
സർക്കാർ ജോലി എന്ന സ്വപ്നം ഇനി സ്വപ്നം മാത്രമല്ല! Join Kerala's Top-rated PSC Coaching Programs
Join NowKSEB Sub Engineer Electrical Module 1 Study Notes 2026 – Basic Electrical Engineering
| Module Topics | Subtopics | Download PDF |
|---|---|---|
| Fundamental Laws and Circuits | Ohm’s Law | |
| Conductance | ||
| Resistance | ||
| Temperature Effect on Resistance | ||
| Kirchhoff’s Current Law (KCL) | ||
| Kirchhoff’s Voltage Law (KVL) | ||
| Series Resistors | ||
| Parallel Resistors | ||
| Voltage Divider Rule | ||
| Current Divider Rule | ||
| Network Theorems (DC Circuits) | Superposition Theorem | |
| Thevenin’s Theorem | ||
| Norton’s Theorem | ||
| Reciprocity Theorem | ||
| Maximum Power Transfer Theorem | ||
| Power and Energy | DC Power | Available Soon |
| Single-Phase AC Power | Available Soon | |
| Three-Phase Power | Available Soon | |
| Electrical Energy and Units | Available Soon | |
| Power and Energy Conversions | Available Soon | |
| Electrical Energy Cost Calculations | Available Soon | |
| Electrostatics | Coulomb’s Law | Available Soon |
| Electric Field Strength | Available Soon | |
| Electric Flux Density | Available Soon | |
| Absolute and Relative Permittivity | Available Soon | |
| Capacitance | Available Soon | |
| Series and Parallel Capacitors | Available Soon | |
| Energy Stored in a Capacitor | Available Soon | |
| Capacitor Charging and Discharging | Available Soon | |
| RC Time Constant | Available Soon | |
| Electromagnetism | Magnetic Flux Density | Available Soon |
| Magnetising Force | Available Soon | |
| Permeability | Available Soon | |
| Magnetomotive Force (MMF) | Available Soon | |
| Magnetic Reluctance | Available Soon | |
| Magnetic Circuit Law | Available Soon | |
| Self-Inductance | Available Soon | |
| Energy Stored in an Inductor | Available Soon | |
| Force on a Current-Carrying Conductor | Available Soon | |
| Lifting Force of an Electromagnet | Available Soon | |
| Faraday’s Laws of Electromagnetic Induction | Available Soon | |
| Lenz’s Law | Available Soon | |
| Dynamically and Statically Induced EMF | Available Soon | |
| B-H Curve and Magnetic Saturation | Available Soon | |
| Hysteresis Loop and Hysteresis Loss | Available Soon | |
| Electrical Measuring Instruments (Basics) | Moving Coil (PMMC) Instruments | Available Soon |
| Moving Iron (MI) Instruments | Available Soon | |
| Dynamometer-Type Instruments | Available Soon | |
| Induction-Type Instruments | Available Soon | |
| Thermocouple and Rectifier-Type Instruments | Available Soon | |
| Classification of Measuring Instruments | Available Soon | |
| Deflecting, Controlling and Damping Torques | Available Soon | |
| Ammeter and Voltmeter | Available Soon | |
| Two-Wattmeter Method for Three-Phase Power Measurement | Available Soon | |
| Electrical Engineering Materials | Conducting Materials | Available Soon |
| High-Resistance Alloys | Available Soon | |
| Semiconductor Materials | Available Soon | |
| Soft Magnetic Materials | Available Soon | |
| Hard Magnetic Materials | Available Soon | |
| Insulating Materials | Available Soon | |
| Insulation Classes and Temperature Ratings | Available Soon |
KSEB Sub Engineer Electrical Module 2 Study Notes 2026 – Power Systems and Utilization
| Main Topic | Subtopics | Download PDF |
|---|---|---|
| Power Factor | Power Triangle and Power Factor | Available Soon |
| Causes of Low Power Factor | Available Soon | |
| Effects of Low Power Factor | Available Soon | |
| Power Factor Improvement Methods | Available Soon | |
| Capacitor kVAR Calculation | Available Soon | |
| Power Generating Stations | Thermal Power Stations | Available Soon |
| Hydroelectric Power Stations | Available Soon | |
| Nuclear Power Stations | Available Soon | |
| Diesel Power Stations | Available Soon | |
| Gas Turbine Power Stations | Available Soon | |
| Types of Hydro Turbines | Available Soon | |
| Classification of Power Stations | Available Soon | |
| Site Selection of Power Stations | Available Soon | |
| Tariff | Flat Rate Tariff | Available Soon |
| Block Rate Tariff | Available Soon | |
| Two-Part Tariff | Available Soon | |
| Three-Part Tariff | Available Soon | |
| Maximum Demand Tariff | Available Soon | |
| Power Factor Tariff | Available Soon | |
| Time-of-Day (TOD) Tariff | Available Soon | |
| Electricity Bill and Energy Cost Calculations | Available Soon | |
| Load Terms and Factors | Connected Load | Available Soon |
| Maximum Demand | Available Soon | |
| Demand Factor | Available Soon | |
| Load Factor | Available Soon | |
| Diversity Factor | Available Soon | |
| Plant Capacity Factor | Available Soon | |
| Base Load and Peak Load | Available Soon | |
| Load Curve | Available Soon | |
| Interconnection of Power Systems | Available Soon | |
| Transmission Lines | Transmission Voltage Levels in India | Available Soon |
| Distribution Voltage Levels | Available Soon | |
| Transmission Line Conductors | Available Soon | |
| Types of Insulators | Available Soon | |
| Causes of Insulator Failure | Available Soon | |
| Transmission Line Supporting Structures | Available Soon | |
| Sag and Tension Calculations | Available Soon | |
| String Efficiency | Available Soon | |
| Transmission Line Parameters | Available Soon | |
| Transposition of Conductors | Available Soon | |
| Classification of Transmission Lines | Available Soon | |
| Transmission Efficiency | Available Soon | |
| Voltage Regulation | Available Soon | |
| Ferranti Effect | Available Soon | |
| Corona Effect and Reduction Methods | Available Soon | |
| Skin Effect | Available Soon | |
| Distribution | Feeder | Available Soon |
| Distributor | Available Soon | |
| Service Mains | Available Soon | |
| Radial Distribution System | Available Soon | |
| Ring Main Distribution System | Available Soon | |
| Interconnected Distribution System | Available Soon | |
| Overhead and Underground Distribution Systems | Available Soon | |
| Underground Cable Laying Methods | Available Soon | |
| Relays, Circuit Breakers, Lightning Arresters and Earthing | Types and Working Principles of Relays | Available Soon |
| Overcurrent and Earth Fault Relays | Available Soon | |
| Directional and Differential Relays | Available Soon | |
| Distance Protection Relays | Available Soon | |
| Buchholz Relay | Available Soon | |
| Protection Schemes for Alternators, Transformers and Feeders | Available Soon | |
| Types of Circuit Breakers | Available Soon | |
| Circuit Breaker Ratings | Available Soon | |
| Isolator vs. Circuit Breaker | Available Soon | |
| Types of Lightning Arresters | Available Soon | |
| Earthing Methods | Available Soon | |
| Earth Resistance and Safety Requirements | Available Soon | |
| Electrolysis, Welding, Heating and Traction | Faraday’s Laws of Electrolysis | Available Soon |
| Applications of Electrolysis | Available Soon | |
| Types of Electric Welding | Available Soon | |
| Resistance Welding Methods | Available Soon | |
| Types of Electric Heating | Available Soon | |
| Induction and Dielectric Heating | Available Soon | |
| Electric Traction Systems | Available Soon | |
| Speed-Time Curve of Electric Traction | Available Soon | |
| Tractive Effort Calculations | Available Soon | |
| Acceleration and Gradient Effort | Available Soon | |
| Specific Energy Consumption | Available Soon | |
| Electric Braking Methods | Available Soon | |
| Conventional and Non-Conventional Energy Sources | Conventional Energy Sources | Available Soon |
| Non-Conventional Energy Sources | Available Soon | |
| Solar Photovoltaic Systems | Available Soon | |
| Solar Thermal Systems | Available Soon | |
| Solar Energy Storage and Applications | Available Soon | |
| Wind Energy Conversion Systems | Available Soon | |
| Wind Power Formula and Calculations | Available Soon | |
| Wind Energy Storage Methods | Available Soon |
KSEB Sub Engineer Electrical Module 3 Study Notes 2026 – Measurements, Wiring and Illumination
| Main Topic | Subtopics | Download PDF |
|---|---|---|
| Measuring Instruments and Measurements | Types of Measurement Errors | Available Soon |
| Accuracy, Precision and Sensitivity | Available Soon | |
| Ammeter Range Extension Using Shunts | Available Soon | |
| Voltmeter Range Extension Using Multipliers | Available Soon | |
| Single-Phase and Three-Phase Power Measurement | Available Soon | |
| Electrical Energy Measurement | Available Soon | |
| Megger and Insulation Resistance Measurement | Available Soon | |
| Low, Medium and High Resistance Measurement Methods | Available Soon | |
| Wheatstone Bridge | Available Soon | |
| Potentiometer and Its Applications | Available Soon | |
| Murray Loop and Varley Loop Tests | Available Soon | |
| Maxwell’s Bridge | Available Soon | |
| Anderson Bridge | Available Soon | |
| Schering Bridge | Available Soon | |
| Cathode Ray Oscilloscope (CRO) | Available Soon | |
| Synchroscope | Available Soon | |
| Frequency Meter | Available Soon | |
| Time-of-Day (TOD) Meter | Available Soon | |
| Digital Measuring Instruments | Available Soon | |
| Sensors and Transducers | Available Soon | |
| Current Transformer (CT) and Potential Transformer (PT) | Available Soon | |
| Wiring and Accessories | Types of Wires and Cables | Available Soon |
| Wiring Systems and Methods | Available Soon | |
| Types of Fuses | Available Soon | |
| Miniature Circuit Breaker (MCB) | Available Soon | |
| Moulded Case Circuit Breaker (MCCB) | Available Soon | |
| Earth Leakage Circuit Breaker (ELCB) | Available Soon | |
| Residual Current Circuit Breaker (RCCB) | Available Soon | |
| Electrical Wiring Accessories | Available Soon | |
| Selection of Wiring Accessories | Available Soon | |
| Domestic Wiring Schemes | Available Soon | |
| Industrial Wiring Schemes | Available Soon | |
| Indian Electricity Rules and Voltage Classifications | Available Soon | |
| IS Codes for Wiring, Earthing and Illumination | Available Soon | |
| Illumination | Luminous Flux | Available Soon |
| Luminous Intensity | Available Soon | |
| Illumination and Lux | Available Soon | |
| Luminous Efficacy | Available Soon | |
| Luminance | Available Soon | |
| Inverse Square Law of Illumination | Available Soon | |
| Lambert’s Cosine Law | Available Soon | |
| Lighting Calculations | Available Soon | |
| Number of Lamps and Lumen Method | Available Soon | |
| Space-to-Height Ratio | Available Soon | |
| Types of Lighting Schemes | Available Soon | |
| Incandescent Lamps | Available Soon | |
| Fluorescent Lamps and CFLs | Available Soon | |
| LED Lamps | Available Soon | |
| Mercury Vapour Lamps | Available Soon | |
| Sodium Vapour Lamps | Available Soon | |
| Metal Halide Lamps | Available Soon | |
| Ballasts, Chokes and Starters | Available Soon |
Prepare for Kerala PSC Technical Exams with Entri
സർക്കാർ ജോലി എന്ന സ്വപ്നം ഇനി സ്വപ്നം മാത്രമല്ല! Join Kerala's Top-rated PSC Coaching Programs
Join NowKSEB Sub Engineer Electrical Module 4 Study Notes 2026 – Electrical Machines
| Main Topic | Subtopics | Download PDF |
|---|---|---|
| DC Generators | EMF Equation of DC Generators | Available Soon |
| Types of DC Generators | Available Soon | |
| Lap and Wave Windings | Available Soon | |
| Characteristics of DC Generators | Available Soon | |
| Conditions for Voltage Build-Up | Available Soon | |
| Critical Field Resistance and Critical Speed | Available Soon | |
| Armature Reaction | Available Soon | |
| Commutation | Available Soon | |
| Equaliser Rings and Equaliser Bars | Available Soon | |
| Parallel Operation of DC Generators | Available Soon | |
| Losses and Efficiency of DC Generators | Available Soon | |
| Design Aspects of DC Generators | Available Soon | |
| DC Motors | Back EMF, Speed and Torque Equations | Available Soon |
| Types and Characteristics of DC Motors | Available Soon | |
| Applications of DC Motors | Available Soon | |
| Three-Point and Four-Point Starters | Available Soon | |
| Speed Control of DC Motors | Available Soon | |
| Swinburne’s Test | Available Soon | |
| Hopkinson’s Test | Available Soon | |
| Brake Test and Retardation Test | Available Soon | |
| Transformers | Working Principle and Mutual Induction | Available Soon |
| Transformer Turns Ratio | Available Soon | |
| EMF Equation of Transformers | Available Soon | |
| Core-Type and Shell-Type Transformers | Available Soon | |
| Step-Up and Step-Down Transformers | Available Soon | |
| Transformer Losses | Available Soon | |
| Transformer Efficiency and All-Day Efficiency | Available Soon | |
| Open-Circuit and Short-Circuit Tests | Available Soon | |
| Transformer Accessories and Cooling | Available Soon | |
| Current Transformer (CT) and Potential Transformer (PT) | Available Soon | |
| Autotransformers and Their Applications | Available Soon | |
| Induction Motors | Synchronous Speed, Slip and Rotor Frequency | Available Soon |
| Squirrel-Cage and Slip-Ring Induction Motors | Available Soon | |
| Power Stages in Induction Motors | Available Soon | |
| Torque Equation and Torque Characteristics | Available Soon | |
| Starting Methods of Induction Motors | Available Soon | |
| DOL Starter | Available Soon | |
| Star-Delta Starter | Available Soon | |
| Autotransformer Starter | Available Soon | |
| Rotor Resistance Starter | Available Soon | |
| Speed Control of Induction Motors | Available Soon | |
| Types of Single-Phase Induction Motors | Available Soon | |
| Synchronous Machines | Alternators and Synchronous Speed | Available Soon |
| Voltage Regulation of Alternators | Available Soon | |
| Synchronisation and Parallel Operation | Available Soon | |
| Load Sharing Between Alternators | Available Soon | |
| Working Principle of Synchronous Motors | Available Soon | |
| Starting Methods of Synchronous Motors | Available Soon | |
| Synchronous Condensers and Power Factor Correction | Available Soon | |
| V-Curves and Inverted V-Curves | Available Soon | |
| Hunting and Damper Windings | Available Soon | |
| Excitation Systems of Synchronous Machines | Available Soon | |
| Applications of Synchronous Machines | Available Soon | |
| Fractional Horsepower (FHP) Motors | Types and Applications of FHP Motors | Available Soon |
| Shaded-Pole Motors | Available Soon | |
| Universal Motors | Available Soon | |
| Stepper Motors and Their Types | Available Soon | |
| Reluctance Motors | Available Soon |
KSEB Sub Engineer Electrical Module 5 Study Notes 2026 – Electronics and Digital Systems
| Main Topic | Subtopics | Download PDF |
|---|---|---|
| Semiconductors, Diodes and Transistors | N-Type and P-Type Semiconductors | Available Soon |
| PN Junction Diode and Biasing | Available Soon | |
| Zener Diode and Special-Purpose Diodes | Available Soon | |
| BJT: NPN and PNP Transistors | Available Soon | |
| Transistor Configurations: CB, CE and CC | Available Soon | |
| Transistor Current Relations: Alpha and Beta | Available Soon | |
| Transistor Biasing Methods | Available Soon | |
| Rectifiers and Filters | Half-Wave Rectifier | Available Soon |
| Full-Wave Centre-Tap Rectifier | Available Soon | |
| Full-Wave Bridge Rectifier | Available Soon | |
| Rectifier Parameters: Average DC Voltage, Ripple Factor, Efficiency and PIV | Available Soon | |
| Rectifier Filters: Capacitor, Inductor, LC and Pi Filters | Available Soon | |
| Percentage Voltage Regulation | Available Soon | |
| IC Voltage Regulators: 78xx, 79xx and LM317 | Available Soon | |
| Wave Shaping Circuits | Clippers: Biased and Unbiased | Available Soon |
| Clampers and DC Level Shifting | Available Soon | |
| Amplifiers and Feedback | Amplifier Classes: A, B, AB and C | Available Soon |
| Amplifier Coupling Methods | Available Soon | |
| Frequency Response and Bandwidth | Available Soon | |
| Negative and Positive Feedback | Available Soon | |
| Oscillators, Multivibrators and Schmitt Trigger | Barkhausen Criteria for Oscillations | Available Soon |
| Hartley Oscillator | Available Soon | |
| Colpitts Oscillator | Available Soon | |
| RC Phase-Shift Oscillator | Available Soon | |
| Crystal Oscillator | Available Soon | |
| Astable, Monostable and Bistable Multivibrators | Available Soon | |
| Schmitt Trigger: Hysteresis, UTP and LTP | Available Soon | |
| Operational Amplifiers | Ideal Op-Amp Characteristics | Available Soon |
| Inverting Amplifier | Available Soon | |
| Non-Inverting Amplifier | Available Soon | |
| Voltage Follower | Available Soon | |
| Summing and Difference Amplifiers | Available Soon | |
| Integrator and Differentiator | Available Soon | |
| Comparator and IC 741 Op-Amp | Available Soon | |
| Digital Electronics | Number Systems and Conversions | Available Soon |
| 1’s and 2’s Complements | Available Soon | |
| Logic Gates: AND, OR and NOT | Available Soon | |
| Universal Gates: NAND and NOR | Available Soon | |
| XOR and XNOR Gates | Available Soon | |
| Boolean Algebra and De Morgan’s Theorems | Available Soon | |
| Karnaugh Map (K-Map) Simplification | Available Soon | |
| Half Adder and Full Adder | Available Soon | |
| Multiplexers and Demultiplexers | Available Soon | |
| Encoders, Decoders and Comparators | Available Soon | |
| Flip-Flops: SR, JK, D and T | Available Soon | |
| Master-Slave Flip-Flop and Race-Around Condition | Available Soon | |
| Asynchronous and Synchronous Counters | Available Soon | |
| Mod-N Counters | Available Soon | |
| Shift Registers: SISO, SIPO, PISO and PIPO | Available Soon |
KSEB Sub Engineer Electrical Module 6 Study Notes 2026 – Microprocessors and Automation
| Main Topic | Subtopics | Download PDF |
|---|---|---|
| Power Electronic Devices | Power Diode | Available Soon |
| BJT | Available Soon | |
| MOSFET | Available Soon | |
| IGBT | Available Soon | |
| UJT | Available Soon | |
| SCR (Thyristor) | Available Soon | |
| TRIAC | Available Soon | |
| DIAC | Available Soon | |
| SCR | Two-Transistor Model | Available Soon |
| Operating Modes | Available Soon | |
| Latching Current and Holding Current | Available Soon | |
| Triggering Methods | Available Soon | |
| Protection Methods | Available Soon | |
| Commutation | Available Soon | |
| Power Electronic Circuits | Controlled Rectifier | Available Soon |
| Chopper | Available Soon | |
| Inverter | Available Soon | |
| Cycloconverter | Available Soon | |
| Converter Output Formulas | Available Soon | |
| PWM Techniques | Available Soon | |
| Electric Drives | Drive Components | Available Soon |
| Four-Quadrant Operation | Available Soon | |
| Selection of Drive Motors | Available Soon | |
| Power Supplies | SMPS | Available Soon |
| UPS | Available Soon | |
| Servo Stabiliser | Available Soon | |
| Buck-Boost Regulator | Available Soon | |
| Microprocessor 8085 | Features | Available Soon |
| Pins and Buses | Available Soon | |
| Registers and Register Pairs | Available Soon | |
| Flag Register | Available Soon | |
| Interrupts | Available Soon | |
| Instruction Set | Available Soon | |
| Addressing Modes | Available Soon | |
| Functional Blocks | Available Soon | |
| Microcontroller 8051 | Features | Available Soon |
| Memory Organisation | Available Soon | |
| I/O Ports | Available Soon | |
| Timers and Counters | Available Soon | |
| Interrupts | Available Soon | |
| Addressing Modes | Available Soon | |
| Microcontrollers AVR and PIC | AVR Architecture | Available Soon |
| PIC Architecture | Available Soon | |
| Memory and Peripherals | Available Soon | |
| Applications | Available Soon | |
| PLC | Components | Available Soon |
| Scan Cycle | Available Soon | |
| Ladder Logic | Available Soon | |
| Industrial Automation | Need for Automation | Available Soon |
| Sensors and Error Detectors | Available Soon | |
| Controllers and Actuators | Available Soon | |
| Control Systems | Open-Loop Control | Available Soon |
| Closed-Loop Control | Available Soon | |
| Servomotors | Available Soon | |
| Synchro | Available Soon | |
| Control Actions | ON–OFF Control | Available Soon |
| Proportional (P) Control | Available Soon | |
| Integral (I) Control | Available Soon | |
| PI Control | Available Soon | |
| Derivative (D) Control | Available Soon | |
| PD Control | Available Soon | |
| PID Control | Available Soon | |
| Industrial Automation | Distributed Control System (DCS) | Available Soon |
Study the Entri Way: Notes, Tests and Classes
Notes work best when you test them. On the Entri app you can:
- Attempt module-wise and full-length mock tests on the Kerala PSC Sub Engineer Electrical syllabus
- Practise previous-year-pattern questions with explanations
- Follow live and recorded classes for difficult topics
- Track your accuracy and weak modules
- Get daily updates on Kerala PSC and KSEB notifications
Download the Entri app today and combine these study notes with regular practice
