Program Description

Power system protection and switchgear plays a crucial role in establishing reliable electrical power systems. Improperly designed protection systems can lead to major power failures. Due to the increasing dependency of electricity, such power failures can have a serious impact on society and the economy. Application knowledge of power system-protection is the key when it comes to optimising the reliability level of electrical infrastructure. With the advances in protection and communication technology in recent decades with the strong penetration of renewable energy sources, the design and operation of power system protection systems has become even more challenging. The course provides an up-to-date presentation of the role of protective relays in protecting the power system equipment. It provides a theoretical summary along with examples of real-life engineering applications to a variety of technical problems, thereby bridging the gap between the theoretical advances, experimental validations and practical engineering.


  • Identify and get familiarized with power system protection and switchgear
  • Design of power system apparatus protection and selection of static/numerical relays for various application
  • Analyse the functionality of different high voltage/low voltage switchgears
  • Illustrate short circuit analysis and relay co-ordination for real time industrial scenario using ETAP

Course login valid for 4 months from the date of enrolment

Key Highlights

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Electrical Calculations: Relay Coordination, Short Circuit Calculation. Both manual and ETAP software simulation with real industrial examples.

Course enrollment data

Learning Format



14 weeks

Certified by

IITM Pravartak Technologies Foundation
Technology Innovation Hub (TIH) of IIT Madras and
L&T EduTech

Program Fee

Rs. 5300/- inclusive of Tax


Program Description

Program Brochure

Education Qualification

•    Students pursuing Diploma / UG / PG Programs in Electrical & Electronics and other allied domains
•    Faculties in the field of Electrical & Electronics and other allied domains
•    Working professionals in the above domains

Suggested Prerequisites

Basics of Electrical Engineering

Teaching Hours

28 hours

Lead Faculty

1.  Mr. Jembu Kailas KK, Lead Subject Matter Expert – L&T EduTech

Mr. Jembu Kailas KK is the Lead Subject Matter Expert (SME) in Electrical Engineering at L&T EduTech. He holds a B.E. degree in Electrical & Electronics Engineering and have 36 years of experience in designing, engineering, planning, and executing electrical projects. He is a member of IEEE, National Building Code, and QIC, as well as a member of IEEMA. He has presented 10 papers at national and international conferences. His expertise lies in electrical substations, power distribution, and industrial and building electrification.

2.  Dr. Rangarajan P, Subject Matter Expert – L&T EduTech

Dr Rangarajan P holds Ph.D. in Electrical Engineering specializing in VLSI & Signal Processing from Anna University, obtained in 2004. He also has a master’s degree in Power Electronics from the same university, earned in 1996, and a Bachelor's degree in Electrical & Electronics Engineering from Bharathiar University, completed in 1990. With a total working experience of 30 years, have published seventy papers in international journals, secured four patents, and guided eighteen Ph.D. scholars. He has executed projects worth over 1.5 crores funded by AICTE and DST. In 2014, he has honoured with the CTS Best Faculty award

Learning Schedule

Overview of Power System, Need for Power System Protection, Types of Electrical Faults, Protective Relay, Types of Protection, Primary and Back-Up Protection, Components of Protection System & Classification of Protective Schemes, Basics of Instrument Transformers, Modelling of CTs Instrument Transformers, Instrument Transformer Saturation and DC Offset Current, Knee Point, Optical Instrument Transformer (Advanced Technology), Instrument Transformer Connection & Testing, Causes of Over voltages, Lightning Phenomena, Overvoltage due to Lightning, Protection of Transmission Lines against Direct Lightning Strokes, Protection of Stations and Sub-stations from Direct Strokes.

Introduction to Overcurrent Protection, Fundamental Principles of Overcurrent Relays, Relays used in Overcurrent Protection, Overcurrent Relay settings Principles, Introduction to Differential relays, Applications of Differential Relay, Pilot Wire Differential Relays Device 87L, Ground Fault Protection, Motor Protection Requirements, Negative Phase Sequence Protection of AC Motors (Advanced concepts), Single Phasing of AC Motors, Phase Reversal Protection of AC Motors, Under Voltage Protection of AC Motors, Comprehensive Motor Protection with numerical relay, Introduction to Numerical Protection, Different types of Numerical Protection, Application of Artificial Intelligence to Power System Protection (Advanced Technology), Application of Artificial Neural Network (ANN) to Overcurrent Protection Directional Relay (Advanced Technology), Substation Automation (Advanced Technology).

Introduction to Distance Protection, Impedance / MHO Distance Relay, Distance Relay using Quadrilateral Characteristics, Setting of Distance Relays for Zone Protection, Distance Protection Schemes for Transmission Lines, Distance Pilot Scheme Protection of Transmission Lines, Carrier Assisted Distance Protection, Introduction to Generator Protection, Classification of Generator Protection, Generator Differential Protection, Backup Impedance Protection, Negative Phase Sequence Protection (Advanced concepts), Generator Stator Earth Fault Protection, Generator Under Frequency Protection, Protection Requirements of Transformers, Types of Faults, Typical Protective Schemes for Industrial Power Transformers, Differential Protection of Transformers, Restricted Earth Fault Protection, Overcurrent & Overload Protection, Buchholz Protection, Sudden-Pressure Relay, T Protection of Shunt Reactors.

Bus Protection Schemes, Bus Differential Relaying Schemes, Bus Differential Protection with Overcurrent Relays, Bus Protection with Percentage Restrained Differential Relays, Bus High- Impedance Voltage Differential Protection (Advanced concepts), Alternative Bus Protective Schemes, Introduction and Rate of Frequency Decline, , Restoring Service, Introduction to Unit Protection of Feeders, Circulating Current System, Phase Comparison Protection Scheme, Introduction to Protection Signalling and Tripping, Digital / Numerical Current Differential Protection System, Carrier Unit Protection Schemes, Examples of Unit Protection Schemes, Formulating a Load Shedding Scheme.

Low Voltage Switch Gear Equipment, Medium Voltage Switch Gear Equipment, High Voltage Switch Gear Equipment, Short Circuit Currents and Switching Duties, Concept of Circuit Interruption, Introduction to Circuit Breakers, Rating of Circuit Breaker, Classification of Circuit Breakers, Air Circuit Breakers, Oil Circuit Breakers, SF6 Circuit Breakers, Vacuum Circuit Breakers, High Voltage DC

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