Course Overview

Electrical power systems rely on effective protection schemes to safeguard equipment, maintain supply continuity, and ensure the safety of personnel and infrastructure. Poorly designed or uncoordinated protection systems can lead to equipment damage, cascading faults, prolonged outages, and significant operational and financial losses. A well-engineered protection philosophy is therefore essential for the reliable operation of modern low-, medium-, and high-voltage networks.

The Protection of Electrical Power Systems programme by TransforMentors Academy provides participants with the practical knowledge and technical skills required to design, analyse, and coordinate electrical protection systems across industrial and utility power networks. The course covers fault analysis, protection principles, relay technologies, grading and coordination, transformer and feeder protection, directional protection, and advanced network protection schemes.

Through practical exercises, engineering case studies, and interactive discussions, participants will explore protection system design, fault calculations, relay settings, discrimination techniques, intertripping schemes, and best practices for maintaining system reliability and operational safety. The programme also examines modern protection technologies and the integration of digital protection systems into contemporary power networks.

Agenda

Day — 1 Introduction to Electrical Protection Principles

• Understanding the role of protection systems in electrical network design and operation
• Exploring the fundamental principles of electrical protection for safe and reliable power systems
• Identifying key safety and design requirements in modern electrical networks
• Reviewing the main protection components and their operating principles:
  • Low Voltage (LV) and Medium Voltage (MV) fuses
  • Time-limit fuses and Current Transformer (CT) release mechanisms
  • Protection relays
• Understanding the concept of protection grading and its importance in achieving selective coordination
• Applying protection principles to improve network reliability and fault management
• Exercise: Perform a basic relay–fuse coordination study using time-current characteristic curves

Day — 2 Low Voltage (LV) and High Voltage (HV) Networks Protection

• Understanding LV network architectures and their protection strategies
• Examining LV system configurations and the selection and placement of protection devices
• Exploring HV network protection philosophies and key architectural differences
• Reviewing HV system topologies and equipment-specific protection requirements
• Understanding fuse technologies and coordination principles across different voltage levels
• Exploring the operating principles and applications of electronic Air Circuit Breaker (ACB) relays
• Applying protection coordination techniques to improve network reliability and fault discrimination
• Exercise: Configure and plot the characteristics of an electronic LV relay for a sample feeder system

Day — 3 Fault Analysis and Instrument Transformers

• Identifying the common types of electrical faults in power systems
• Understanding fault levels and their importance in protection system design
• Applying network reduction techniques for basic fault current calculations
• Calculating balanced three-phase fault currents for practical power system applications
• Understanding the functions and specifications of instrument transformers:
  • Current Transformers (CTs)
  • Voltage Transformers (VTs)
• Selecting appropriate CT and VT characteristics to support accurate measurement and protection
• Exercise: Calculate fault levels in a simplified electrical network and determine suitable CT requirements

Day — 4 Coordination and Protection of Radial Networks

• Understanding grading principles and their importance in achieving selective protection coordination
• Analysing coordination between protective devices to ensure reliable fault isolation
• Exploring the functions and setting principles of modern electronic protection relays
• Examining protection schemes for radial distribution networks, including:
  • Urban underground networks
  • Overhead rural feeders
  • Distribution transformers
• Understanding busbar protection schemes and their role in enhancing substation reliability
• Exploring the operation of Arc Suppression Coils (ASC) and their contribution to fault management
• Exercise: Design a complete protection and grading scheme for a radial distribution network

Day — 5 Advanced Protection Applications in Complex Networks

• Identifying common transformer fault types and their electrical characteristics
• Understanding transformer and feeder protection principles and applications
• Exploring protection strategies for non-radial networks, including:
  • Directional overcurrent protection
  • Earth fault protection
  • Distance protection
• Reviewing operational requirements and protection schemes for MV/LV power systems
• Understanding intertripping techniques and their application in metropolitan distribution networks
• Applying advanced protection principles to improve network reliability and fault management
• Exercise: Develop a protection philosophy for a transformer-fed looped network incorporating a small generator
• Key takeaways and course evaluation

Learning Outcomes

By attending the Protection of Electrical Power Systems course, you will be able to:

• Understand the fundamental principles of electrical protection and their role in ensuring safe and reliable power system operation
• Analyse low-voltage network configurations and select suitable protective devices for effective system protection
• Calculate fault levels and determine appropriate current transformer (CT) ratings for practical applications
• Evaluate relay characteristics and configure settings to achieve selective coordination during fault conditions
• Design protection schemes for radial distribution networks to improve supply continuity and minimise service interruptions
• Apply transformer protection techniques to reduce equipment damage and enhance system reliability
• Implement directional overcurrent protection methods to improve fault discrimination and network stability
• Assess intertripping requirements and coordinate protection schemes to strengthen the reliability and security of interconnected power systems

Who Should Attend

The Protection of Electrical Power Systems course is ideal for professionals involved in power network design, protection, and operation. It is especially beneficial for:

• Electrical Power Engineers
• Protection and Relay Engineers
• Substation and Distribution Engineers
• Maintenance Engineers
• Utility Operations Personnel
• Network Planning Engineers
• Transmission and Distribution Engineers
• Power System and Grid Operations Engineers
• Commissioning and Testing Engineers
• Asset Management and Reliability Professionals
• Anyone responsible for the design, operation, maintenance, and protection of electrical power systems