About Transformer Protection Training Package

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Chapter I: Transformer Introduction

  • Course introduction and transformer history (13 min)
  • Concepts of the Electric Power Transmission Transformers (10 min)
  • How does a Transformer work part I (7 min)
  • How does a Transformer work part II (4 min)
  • Transformer Parts and Functions (28 min)
  • Single-phase and three-phase transformers (2 min)
  • Transformer shipping and installation (9 min)
  • Large Transformer Transportation (1 min)
  • Transformer Equivalent Circuit (5 min)
  • Why do we need an equivalent circuit (5 min)
  • The Series Components (8 min)
  • The Shunt Components (6 min)
  • The Internal Ideal Transformer (4 min)
  • Simplifying the Transformer Equivalent Circuit Part I (6 min)
  • Simplifying the Transformer Equivalent Circuit Part II (4 min)
  • Simplifying the Transformer Equivalent Circuit Part III (6 min)
  • Vector Group Connections (15 min)

Chapter II: Transformer Faults

  • Power Transformer Faults (3 min)
  • Top 10 Transformer Blasts and Short Circuits (15 min)
  • Power Transformer Explosion Incidents & Reasons & Precautionary Measures (4 min)
  • Winding & Terminal Failures (4 min)
  • The Effect of Through Faults on Power Transformers (4 min)
  • Tap Changer (OLTC) Failure (3 min)
  • Transformer bushings How it works (1 min)
  • High Voltage bushing Faults early Detection and bushing monitoring (36 min)
  • Why is Online Transformer Bushing Monitoring So Important (3 min)
  • Transform Miscellaneous Failures (3 min)
  • Why do we need Transformer Protection? (2 min)
  • How do we Protect Transformers? (9 min)
  • GE Transformer Protection& Control IED (2 min)
  • SEL 787 & ABB RET 670 (14 min)

Chapter III: Transformer Protection Functions

  • Differential Protection Part I (16 min)
  • Transformer Differential Protection Part II (14 min)
  • Differences between digital transformer differential relays (7 min)
  • Simulate different cases and test the differential transformer protection function (9 min)
  • Restricted Earth Fault Protection(REF) in Transformer (7 min)
  • High Impedance Restricted Earth Fault Protection working principle (7 min)
  • Stability Resistance and Metrosil Resistance in REF Protection (12 min)
  • Low impedance REF (8 min)
  • Buchholz relay (4 min)
  • Transformer Buchholz Protection Relay principal (2 min)
  • Inside the Buchholz relay (4 min)
  • Buchholz relay by MR (5 min)

Chapter IV: Transformer Protection Relay IEDS

  • ABB RET 670 Hardware structure (11 min)
  • ABB RET 670 Transformer Protection Application template (6 min)
  • ABB RET 670 Configuration and T2WPDIF Function block (12 min)
  • ABB RET 670 Parameters and T2WPDIF parameters (11 min)
  • Simulation of the differential protection algorithm in the ABB RET 670 relays (12 min)
  • SIEMENS 7UT85 configuration

Chapter V: Learn with AI tools

  • Transformer protection part 1 (39 min)
  • Transformer protection part 2 (16 min)

Question and answer

  • Operating vs restraint current: What is the difference between these two formulas they look very similar. 

Download Supplementary Files

Part I: Documents that are open to the public

Click here to Download the below pdf files on Google Drvie

  • “ABC Transformers.” Download
  • “ABC’s of Transformers and Coils.” Download
  • “Basic principles and operation of a transformer.” Download
  • “BASICS OF TRANSFORMER.” Download
  • “BEST PRACTICE MANUAL TRANSFORMERS.” Download
  • “Causes and Effects of Overfluxing in Transformers and Comparison of Various Techniques for its Detection.” Download
  • “Chapter 12 Three-Phase Transformer Design.” Download
  • “Condition Monitoring of Power Transformers.” Download
  • “Differential Protection 7UT6 V4.0.” Download
  • “Differential Protection 7UT613/63x V4.60.” Download
  • “Multifunctional Machine Protection 7UM62 V4.70.” Download
  • “MV/LV TRANSFORMER.” Download
  • “MV/LV transformer substations: theory and examples of short-circuit calculation.”
  • “Operation and Maintenance for Power Transformers.”
  • “Practical Transformer Handbook.”
  • “Protecting power transformers from common adverse conditions.”
  • “SEL-787-2/-3/-4 Transformer Protection Relays Instruction Manual.”
  • “A short Course on Electrical Power Transformer.”
  • “SIPROTEC 4 Differential Protection 7UT6x.”
  • “Specifying HV/MV Transformers at Large Sites for an Optimized MV Electrical Network.”
  • “Technical guide The MV/LV transformer substations (passive users).”
  • “Testing of Power Transformers Routine tests, Type tests and Special tests.” Download
  • “TESTING POWER TRANSFORMERS.”
  • “Transformer Book-Martin J. Heathcote.”
  • “Transformer Differential Protection Setting Calculations.”
  • “TRANSFORMER PARALLELING.”
  • “Transformer Physics, Working, and Commissioning Tests.”
  • “Transformer protection RET670 2.0 IEC Application Manual.” Download
  • “Transformer protection RET670 2.0 IEC Technical Manual.”
  • “Transformer Sizing.”
  • “Transformer Tests.”
  • “Transformer Vector Group Test conditions.”
  • “Transformers.”
  • “TRANSFORMERS AND POWER TRANSFORMERS.”
  • “Transformers: Basics, Maintenance, and Diagnostics.”
  • “Typical Construction of Transformers.”
  • “Voltage Regulator TAPCON® 240 Operating Instructions.”
  • “What is Transformers?” Download

Part II: Documents that are available for our users

  • “30 MVA TRANSFORMER RELAY SETTING CALCULATION RELAY TYPE: 7UT85.” Download (users only)
  • “Analysis of Transformer Failures.” Download (users only)
  • “Differential Protection 7UT6 Vector group, Io-Elimination, Io-Correction.” Download (users only)
  • “DIFFERENTIAL PROTECTION PHILOSOPHY AND IT’S APPLICATION IN TRANSFORMERS.” Download (users only)
  • “Digital Differential Protection G. Ziegler.” Download (users only)
  • “Easy Method for Testing Transformer Differential Relays.” Download (users only)
  • “Guide for Transformer Maintenance.” Download (users only)
  • “HANDS ON TESTING OF TRANSFORMER PROTECTION RELAY.” Download (users only)
  • “How to Evaluate the DGA report of your Transformer IEEE C57.104-2019: A brief overview & Case Study.” Download (users only)
  • “IEEE Guide for Protecting Power Transformers.” Download (users only)
  • “IEEE Guide for Protective Relay Applications to Power Transformers.” Download (users only)
  • “IEEE Guide for the Application of Current Transformers Used for Protective Relaying Purposes.” Download (users only)
  • “MiCOM 30 Series Restricted Earth Fault Protection Application Guide.” Download (users only)
  • “Modern Techniques for Protecting, controlling and monitoring power transformers.” Download (users only)
  • “P630 Transformer Differential protection functionality.” Download (users only)
  • “PROTECTION OF MV TRANSFORMERS AT UTILITY AND INDUSTRIAL FACILITIES.” Download (users only)
  • “Protection of MV/LV substation transformers.” Download (users only)
  • “Restricted Earth Fault protection: ANSI 64 REF.” Download (users only)
  • “Restricted Earth-Fault Protection in REF 542plus Application and Setting Guide.” Download (users only)
  • “Specific protection functions for transformers: (ANSI 26 & 63) Buchholz & DGPT2 relays.” Download (users only)
  • “Stability Test of Power Transformer (Differential and REF).” Download (users only)
  • “Testing the Add on stabilization feature in SIPROTEC5 Transformer Differential 7UT86 Relay.” Download (users only)
  • “Testing the SEL Adaptive Slope Restraint Characteristic with Test Universe.” Download (users only)
  • “Transformer differential protection: ANSI 87T.” Download (users only)
  • “Transformer differential relay (87T), GE P649.” Download (users only)
  • “Transformer Protection.” Download (users only)
  • “Transformer Protection.” Download (users only)
  • “TRANSFORMER PROTECTION.” Download (users only)
  • “Transformer Protection.” Download (users only)
  • “Transformer Protection Application Guide.” Download (users only)
  • “Transformer Protection Principles.” Download (users only)
  • “Transformer Protection Testing with Quick CMC.” Download (users only)
  • “TRANSFORMER PROTECTION Transformer Technology Design and Operation.” Download (users only)
  • “Universal Testing Method for Power Transformer Differential Protection.” Download (users only)

Enrollment

How to enroll in this training course & How to access the transformer protection training course:

  • Add the Transformer Protection Training with the below add button
  • Click here to add other products if you are interested
  • Click here to see the cart and check out
  • After payment, we will send your license to access the videos
  • Click here to see how to access the videos and special auxiliary files with the license (course format)
  • NOTE: The updates will be added automatically to the player when you open the course in the player and your system has an internet connection.

Sample & Demo

Please request a demo license if you want to check the training format.

Gallery:

Power system Protection

Text on Transformer Protection

The ABB RET 670 is a numerical generator protection relay designed to provide comprehensive protection and control functions for generators in power plants and other industrial applications. The device offers a wide range of protection features, such as overcurrent, voltage, frequency, and differential protection, as well as advanced functions for grid synchronization and monitoring. With its high-speed processing capabilities and advanced communication options, the RET 670 ensures reliable and efficient protection of generators, helping to enhance system reliability and prevent equipment damage during fault conditions.

Restricted Earth Fault (REF) protection in transformers is a differential protection scheme that detects earth faults within the transformer windings by comparing the current entering and leaving the transformer. The system uses current transformers to measure and compare the current flow, and if an imbalance is detected, it indicates the presence of a fault within the transformer. REF protection is designed to provide fast and reliable detection of earth faults, enabling the disconnection of the transformer from the system to prevent damage and ensure the safety of personnel and equipment. This advanced protection scheme is essential for maintaining transformers’ integrity and operational efficiency in power systems.

Transformer Differential Protection is a crucial element in safeguarding transformers from internal faults. This protection scheme can detect any imbalance that signifies a fault by comparing the current entering and exiting the transformer windings using current transformers. If a fault is detected, the system initiates a trip signal to isolate the transformer from the network, preventing further damage. Differential protection is vital for ensuring the operational integrity of transformers and enhancing system reliability by swiftly isolating faults and minimizing downtime. It plays a critical role in maintaining the performance and longevity of transformer assets in power systems.

The Siemens 7UT85 is a numerical transformer protection relay that offers advanced protection features for medium and high-voltage transformers. It is equipped with various protection functions such as differential, overcurrent, and restricted earth fault protection, ensuring reliable and comprehensive protection for transformers. The 7UT85 is designed to provide accurate fault detection and fast response times to safeguard transformers from internal faults, helping to maintain system reliability and operational efficiency. With its flexible configuration options and integrated communication capabilities, the Siemens 7UT85 is a versatile and effective solution for transformer protection in power systems.

The Buchholz relay is a protective device used in oil-filled electrical equipment, such as transformers and tap changers, to detect and respond to faults and abnormalities in the oil insulation system. This relay operates based on the principle of gas accumulation in the oil. When a fault occurs within the equipment, such as a partial discharge or overheating, gas is generated, leading to increased pressure in the oil. This pressure build-up triggers the Buchholz relay and sends a signal to isolate the equipment to prevent further damage. Additionally, the relay can provide early warning of developing faults, allowing for proactive maintenance to be carried out. Overall, the Buchholz relay serves as a critical component in ensuring the safety and reliability of oil-filled electrical equipment.

Transformer Protection Training

Instructor: Dr. Saeed Roostaee
Focus: Power Transformer Fundamentals, Faults, Protection Functions, Differential & REF Protection, and Numerical Protection Relays

Course Overview

This comprehensive Transformer Protection Training course covers the fundamentals of power transformers, transformer construction and operation, common transformer faults, protection principles, differential protection, Restricted Earth Fault (REF) protection, Buchholz protection, and practical applications using modern numerical protection relays.

The course also includes practical simulations, relay configuration examples, technical documents, application guides, and supplementary resources to help engineers develop both theoretical knowledge and practical skills in transformer protection.

Chapter 1: Transformer Fundamentals

  1. Course Introduction and History of Transformers — 13 min
  2. Concepts of Electric Power Transmission Transformers — 10 min
  3. How Does a Transformer Work? – Part 1 — 7 min
  4. How Does a Transformer Work? – Part 2 — 4 min
  5. Transformer Parts and Their Functions — 28 min
  6. Single-Phase and Three-Phase Transformers — 2 min
  7. Transformer Shipping and Installation — 9 min
  8. Large Transformer Transportation — 1 min
  9. Transformer Equivalent Circuit — 5 min
  10. Why Do We Need an Equivalent Circuit? — 5 min
  11. The Series Components — 8 min
  12. The Shunt Components — 6 min
  13. The Internal Ideal Transformer — 4 min
  14. Simplifying the Transformer Equivalent Circuit – Part 1 — 6 min
  15. Simplifying the Transformer Equivalent Circuit – Part 2 — 4 min
  16. Simplifying the Transformer Equivalent Circuit – Part 3 — 6 min
  17. Transformer Vector Group Connections — 15 min

Chapter Resources

  • Transformer fundamentals PDFs
  • Transformer construction and design documents
  • Vector group reference materials

Chapter 2: Transformer Faults and Protection Overview

  1. Power Transformer Faults — 3 min
  2. Top 10 Transformer Blasts and Short-Circuit Incidents — 15 min
  3. Transformer Explosion Incidents: Causes, Reasons, and Precautionary Measures — 4 min
  4. Winding and Terminal Failures — 4 min
  5. The Effect of Through-Faults on Power Transformers — 4 min
  6. On-Load Tap Changer (OLTC) Failures — 3 min
  7. Transformer Bushings: How They Work — 1 min
  8. High-Voltage Bushing Faults: Early Detection and Monitoring — 36 min
  9. Why Is Online Transformer Bushing Monitoring Important? — 3 min
  10. Miscellaneous Transformer Failures — 3 min
  11. Why Do We Need Transformer Protection? — 2 min
  12. How Do We Protect Power Transformers? — 9 min
  13. GE Transformer Protection and Control IEDs — 2 min
  14. SEL-787 and ABB RET670 Transformer Protection Relays — 14 min

Chapter 3: Transformer Protection Functions

  1. Transformer Differential Protection – Part 1 — 16 min
  2. Transformer Differential Protection – Part 2 — 14 min
  3. Differences Between Digital Transformer Differential Relays — 7 min
  4. Simulation and Testing of Transformer Differential Protection — 9 min
  5. Restricted Earth Fault (REF) Protection in Transformers — 7 min
  6. High-Impedance REF Protection: Operating Principle — 7 min
  7. Stability Resistance and Metrosil in REF Protection — 12 min
  8. Low-Impedance REF Protection — 8 min
  9. Buchholz Relay — 4 min
  10. Buchholz Transformer Protection Relay: Operating Principle — 2 min
  11. Inside a Buchholz Relay — 4 min
  12. Buchholz Relay by MR — 5 min

Chapter 4: Transformer Protection Relays and IEDs

ABB RET670

  1. ABB RET670 Hardware Structure — 11 min
  2. ABB RET670 Transformer Protection Application Template — 6 min
  3. ABB RET670 Configuration and T2WPDIF Function Block — 12 min
  4. ABB RET670 Parameters and T2WPDIF Parameters — 11 min
  5. Simulation of the Differential Protection Algorithm in ABB RET670 — 12 min

Siemens SIPROTEC 5

  1. Siemens SIPROTEC 5 7UT85 Configuration

Chapter 5: Learn with AI Tools

  1. Transformer Protection with AI Tools – Part 1 — 39 min
  2. Transformer Protection with AI Tools – Part 2 — 16 min
  3. Questions and Answers

Example Question

Operating Current vs. Restraint Current: What Is the Difference?

Why do the formulas for operating current and restraint current appear similar? In this section, we examine the definitions, calculation methods, and practical application of these quantities in transformer differential protection.

Supplementary Resources

To make the LMS easier to navigate, I recommend dividing the large PDF collection into two separate sections rather than placing all files under one long list.

Part 1: Publicly Available Documents

Free Resources

This section contains technical documents and reference materials that are publicly available and can help you strengthen your understanding of transformer fundamentals, transformer design, maintenance, testing, and protection.

You can organize the files alphabetically or, even better, by topic:

Transformer Fundamentals

  • ABC Transformers
  • ABC’s of Transformers and Coils
  • Basic Principles and Operation of a Transformer
  • Basics of Transformer
  • A Short Course on Electrical Power Transformer
  • Practical Transformer Handbook
  • Transformer Physics, Working, and Commissioning Tests
  • What Is a Transformer?

Transformer Design and Applications

  • Chapter 12: Three-Phase Transformer Design
  • Transformer Sizing
  • Transformer Paralleling
  • Typical Construction of Transformers
  • Transformers and Power Transformers
  • Specifying HV/MV Transformers at Large Sites for an Optimized MV Electrical Network

Transformer Protection

  • Transformer Differential Protection Setting Calculations
  • Protecting Power Transformers from Common Adverse Conditions
  • Differential Protection 7UT6 V4.0
  • Differential Protection 7UT613/63x V4.60
  • SIPROTEC 4 Differential Protection 7UT6x
  • Transformer Protection RET670 2.0 IEC Application Manual
  • SEL-787 Transformer Protection Relay Instruction Manual

Transformer Testing, Maintenance, and Diagnostics

  • Testing of Power Transformers: Routine Tests, Type Tests and Special Tests
  • Testing Power Transformers
  • Transformer Tests
  • Transformers: Basics, Maintenance, and Diagnostics
  • Condition Monitoring of Power Transformers
  • Operation and Maintenance for Power Transformers
  • Guide to Transformer Maintenance

Part 2: Exclusive Resources for Enrolled Users

Premium Technical Resources – Available to Course Participants

These resources are available exclusively to enrolled students and provide additional technical references, application guides, testing documents, and practical case studies.

I recommend using a Download Resource button for each document rather than writing “Download (users only)” after every title.

You can organize them into:

Transformer Protection

  • Transformer Protection
  • Transformer Protection Application Guide
  • Transformer Protection Principles
  • Modern Techniques for Protecting, Controlling, and Monitoring Power Transformers
  • Transformer Protection Technology, Design, and Operation

Differential Protection

  • Transformer Differential Protection: ANSI 87T
  • Digital Differential Protection – G. Ziegler
  • P630 Transformer Differential Protection Functionality
  • Universal Testing Method for Power Transformer Differential Protection
  • Differential Protection 7UT6: Vector Group, I₀ Elimination, and I₀ Correction

REF Protection

  • Restricted Earth Fault Protection: ANSI 64 REF
  • MiCOM 30 Series Restricted Earth Fault Protection Application Guide
  • Restricted Earth-Fault Protection in REF 542plus: Application and Setting Guide

Transformer Protection Testing

  • Easy Method for Testing Transformer Differential Relays
  • Hands-On Testing of Transformer Protection Relays
  • Stability Test of Power Transformer: Differential and REF
  • Testing the Add-On Stabilization Feature in SIPROTEC 5 Transformer Differential 7UT86 Relay
  • Testing the SEL Adaptive Slope Restraint Characteristic with Test Universe
  • Transformer Protection Testing with Quick CMC

Transformer Faults and Maintenance

  • Analysis of Transformer Failures
  • How to Evaluate a DGA Report of Your Transformer – IEEE C57.104-2019
  • IEEE Guide for Protecting Power Transformers
  • IEEE Guide for Protective Relay Applications to Power Transformers
  • Protection of MV Transformers at Utility and Industrial Facilities
  • Protection of MV/LV Substation Transformers
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