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Protective Relaying Principles and Applications
Published 9/2026
MP4 | Video: h264, 1920x1080 | Audio: AAC, 44.1 KHz, 2 Ch
Language: English | Duration: 12h 46m | Size: 7.19 GB
Understand protective relaying for electrical power systems from principles and settings to testing and troubleshooting
What you'll learn
Explain how protective relaying detects faults, isolates affected equipment, and supports selective, reliable power-system operation.
Analyze power-system faults, grounding methods, sequence quantities, and fault-current behavior for protection applications.
Interpret protection zones, primary and backup schemes, redundancy, and standards to define dependable protection coverage.
Evaluate CTs, VTs, DC systems, trip circuits, relay logic, and schematics for correct protection-system operation.
Apply overcurrent, earth-fault, directional, differential, distance, voltage, frequency, and related relay functions appropriately.
Select suitable protection schemes for feeders, lines, transformers, generators, motors, busbars, and other station equipment.
Develop relay settings using fault studies, equipment limits, operating conditions, engineering margins, and coordination criteria.
Assess protection coordination using relay curves, fuse-recloser behavior, operating sequences, and equipment withstand limits.
Interpret IEC 61850, GOOSE, process bus, teleprotection, time synchronization, and cybersecurity concepts in digital protection systems.
Plan and evaluate secondary injection, primary injection, end-to-end, IEC 61850, commissioning, and maintenance activities.
Analyze disturbance records and event data to assess protection performance, reconstruct operations, and identify abnormal behavior.
Troubleshoot protection-system failures, determine root causes, verify corrective actions, and support safe return to service.
Requirements
A basic understanding of electrical engineering and power-system fundamentals, including voltage, current, three-phase systems, and common power equipment, is recommended for this course. Proficiency in English and a strong interest in power-system protection and protective relaying are also important. Prior academic, technical, or industry experience with electrical power systems would be helpful, but it is not essential, and no advanced qualifications, specialist certifications, or previous protective-relaying experience are required.
Description
"This course contains the use of artificial intelligence."
Protective relays are essential to the dependable operation of modern electrical networks because they provide the intelligence that detects abnormal conditions, determines whether action is required, and initiates the correct tripping response. Effective relay performance depends on accurate measurement, dependable logic, appropriate settings, secure operating characteristics, and reliable interaction with instrument transformers, circuit breakers, control power, and communication systems. Developing a strong understanding ofprotective relay engineering is therefore important for achieving selective fault clearing, limiting equipment damage, maintaining system stability, and reducing unnecessary interruptions.
The course is structured to build relay knowledge in a logical engineering progression. It begins with the principles needed to understand how relays interpret electrical conditions and how their performance should be judged. It then develops deeper understanding of how relay decisions are formed, how protection is applied and coordinated, and how relay systems interact with the wider electrical installation. The learning progressively advances toward modern implementation, verification, lifecycle control, and evidence-based performance assessment, supporting a steady transition from foundational understanding tointerpretation, application, evaluation, andprofessional relay-engineering judgment.
In practical engineering, a relay cannot be assessed only by whether it produces a trip signal. Its performance must be considered in relation to measurement accuracy, system operating conditions, protection boundaries, backup arrangements, communication behavior, control circuits, and the consequences of incorrect or delayed operation. A strongsystems-level understanding of relay behavior supports better decisions when selecting protection approaches, developing settings, checking coordination, reviewing scheme performance, and determining whether protection will remain dependable and secure under changing operating conditions.
The broader professional value lies in being able to work with relay systems throughout their engineering lifecycle with greater technical discipline and confidence. This includes understanding how numerical and digital relay environments influence performance, how settings and configurations should be controlled, and how evidence from testing and operating events can be used to verify correct behavior. Such knowledge supports more effective commissioning, maintenance, disturbance investigation, troubleshooting, corrective action, and safe return to service while strengthening the reliability, security, and integrity ofrelay-based protection systems.
Each lecture includes dedicatedstudy materialand aninfographic summary. Learners should review thestudy material after watching the lecture to strengthen their understanding, and use theinfographic summary for quick revision and easy recall of key concepts whenever needed.
Who this course is for
Students, graduates, and early-career professionals in electrical or power engineering who want to build practical knowledge of protective relaying and power-system protection.
Electrical engineers and protection professionals involved in system design, fault studies, relay settings, coordination, or protection-scheme development.
Testing, commissioning, maintenance, and operations personnel who verify relay performance, protection circuits, communication links, and safe return to service.
Reliability, asset, and troubleshooting professionals who assess disturbances, investigate protection failures, manage settings, and maintain protection-system performance.
Professionals in utilities, generation, transmission, distribution, and industrial power systems where reliable protection of electrical equipment and networks is essential.
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