Modern Power System Protective Relaying


This LAKESHORE ISL Modern Power System Protective Relaying training seminar has been designed to provide a clear and perfect understanding of power system protection schemes and devices including protection relays, fuses, circuit breakers, and other protective devices. In modern power systems, nowadays, protection systems play a significant role in efficiently running plant operations, utility switching, industry load transfer, maintenance programs, and investment policies. The outcome is to minimize system outages and to keep the maintenance and repair costs at reasonable prices. With the advancement of technology, now there is need for many system operators, electrical engineers (at all levels of proficiency), asset engineers, and project engineers to learn more about the power system protection concepts, logic, and applications to acceptable levels.

These days, advanced protection devices are considered as Intelligent Electronic Devices (IED’s) in all modern smart grids where protection schemes, logic, and relay settings rely heavily on a good understanding of communication protocols, inter-tripping schemes, etc. This LAKESHORE ISL Electrical Engineering training seminar will provide sufficient theoretical background in a simple language together with a systematic procedure to analyze electric faults, their consequences, and recommended solutions through industry-based practical worked examples and mini projects to achieve an optimized and coordinated operation of protective devices in typical moderately complex power systems.

This LAKESHORE ISL training seminar will highlight:

  • Electric Fault Types and Fault Calculations
  • Load Studies
  • Protection Relay Types and Functions
  • Protection Logic and Settings
  • Coordination of Protection Devices


At the end of this LAKESHORE ISL training course, you will learn how to:

  • Select fit-for-the-purpose protection relays and other related devices
  • Calculate fault levels and loadings of feeders and branches
  • Develop and analyze typical power systems and their associated protection systems
  • Analyze protection logics and coordination between protection devices
  • Establish communication between protection devices and controllers

Training Methodology

This LAKESHORE ISL Modern Power System Protective Relaying training course will be presented by means of Power Point slides through which all the required theory and equations will be provided. This LAKESHORE ISL Electrical Engineering training course also includes case studies where the participants are required to take part in class activities including system analysis, calculations, relay settings, etc. The instructor will also use training videos for better understanding of the participants. The participants will be progressively assessed during the training course via quizzes, questions, assignments, and worked examples.

Organisational Impact

On successful completion, the Organizational Impact would be:

  • Develop a structured approach and understanding of major protection schemes
  • Ensure safe operation of the electrical equipment and installations
  • Become familiar with testing and measuring instruments
  • Ensure sensible selection of protection functions and relay types for different operation scenarios
  • Implement effective relay protection settings for different zones
  • Calculation of fault levels, propose protection settings, and demonstrate protection coordination

Personal Impact

Participants from different sectors of engineering companies will enormously benefit from this LAKESHORE ISL training programme because they will become quite familiar with:

  • Power system analysis including load and fault studies
  • Role of protective relaying
  • Theoretical concepts and practical equations of power system protection
  • Analysis and design of protection logic and schemes
  • Relay functions and their applications and coordination
  • Complexity of power system switching & operation together with proposed solutions for protection

Who Should Attend?

We encourage the staff involved in the operation, planning, design, and maintenance of power systems to attend this LAKESHORE ISL Modern Power System Protective Relaying training programme.

This LAKESHORE ISL training programme is suitable to a wide range of professionals but will greatly benefit:

  • Project Engineers / Managers
  • Electrical Engineers / Technicians
  • System Operators
  • Design Engineers
  • Asset Engineers / Managers
  • Planning Engineers / Managers
  • Protection, Instrumentation, and Commissioning Engineers / Technicians

Seminar Outline


Protective Devices, Earthing Systems

  • Protection Zones, Local & Backup Protection
  • Sequence Networks
  • Per Unit System
  • CT and VT types, Specifications, and Applications
  • Fuse Types, Applications, Selection, and Coordination
  • Protection Relay Types and Functions
  • Protection Relaying Technology
  • Ungrounded vs. Grounded Systems


Feeder Protection

  • Overcurrent Protection
  • Earth Fault Protection
  • IDMT O/C & E/F Protection
  • Definite Time (DT) Protection
  • High-set Instantaneous Protection
  • Transient Overreach
  • CT & VT Selection
  • Relay Settings


Transformer Protection

  • Transformer O/C and E/F Protection
  • Transformer Unit Protection (REF and Diff)
  • Buchholz & Pressure Relief
  • Transformer Differential Protection Complexities & Solutions
  • Interposing CT’s
  • Transformer-feeder Protection Schemes


Generator Protection, Directional Protection

  • Generator Faults and Protection Features
  • Generator Differential Protection (biased, unbiased)
  • Stabilizing Resistor
  • Metrosil
  • Generator Overall Protection
  • Generator Full Protection
  • Directional Relay Applications and Calculations


Busbar Protection, Line Protection, Tele-protection

  • Busbar High Impedance Protection
  • Frame Leakage Protection
  • Embedded Generation
  • Direct and Permissive Tripping, Blocking Scheme
  • Phase Comparison Protection
  • Line Distance Protection
  • Line Differential Protection