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Transformer Technology, Features and Applications

Duration: 1 day |  Level: Basic

This course aims to enable participants in developing their knowledge and skills in the Features and Applications of Transformer Technology. The learner will develop their understanding of the various technologies related to substations.


This course is designed for individuals who wish to enhance their T&D working knowledge, especially those looking to improve their technical understanding of transformers.

  • Course Objectives:

    At the end of this course participants will be able to:

    • Understand the various transformer technologies related to substations.
    • Know how transformers step-up or step-down voltages, and adjust network voltages.
    • Know the differences between transformer types.

  • Course Content

    • HV Substations
    • Power Transformers
    • Role of Transformers
    • Instrument Transformer
    • Distribution Transformers

  • Programme Schedule

    Day 1

    • Module 1: HV Substations
    • Arrangement with transformers
    • Module 2: Power Transformers
    • Principles
    • Technologies
    • Tap-changers
    • Module 3: Role of Transformers
    • A power plant
    • Main transformers
    • Auxiliary transformers
    • Module 4: Instrument Transformers
    • Current transformers
    • Voltage transformers
    • Module 5: Distribution Transformers
    • Oil-immersed types
    • Dry types
    • Cooling systems
    • Available assessments
    • Easy user navigation
    • Various interactive learning activities
    • Online dictionary on transmission

Duration: 6 Days |  Level: Intermediate

This course aims to enable participants in developing their knowledge and skills in the Operation & Maintenance of Power Transformers. The learner will develop a broad technical understanding of what transformers are today. At the conclusion of the course, the participants will have attained an increased level of knowledge in the design, operation and maintenance of transformers. The course includes one year of access to S3601, e-Learning training programs, accessible 24/7 through our LMS (if required).


This course is designed for EMS Maintenance Engineers and members of Operation & Maintenance teams.

  • Course Objectives:

    At the end of this course participants will be able to

    • Understand power transformer technology.
    • Ensure the operation of transformers.
    • Ensure the appropriate test & evaluation of results.
    • Ensure appropriate maintenance.

  • Course Content

    • Theory, Construction and Operation
    • Indicators and Protections
    • Manufacturing Process
    • Transportation, Erection and Commissioning
    • Periodical Controls, Tests and Maintenance
    • Troubleshooting

  • Programme Schedule

    Day 1

    • Theory, Construction and Operation
    • Theory and operation
    • Electric and Magnetic Field Theory and applications
    • Overvoltages and overcurrents withstands
    • Construction
    • Accessories
    • Tank types, conservator types, and dehydrating breathers
    • Cooling modes
    • Bushings
    • OLTC, OCTC
    • Other accessories

    Day 2

    • Indicators and Protections
    • Indicators and relays
    • Main tank & OLTC pressure devices
    • Other protective devices (differential protection, restricted earth, tank protection...)

    Day 3

    • Manufacturing Process
    • Transformer assembly process in factories
    • Laboratory tests

    Day 4

    • Transportation, Erection and Commissioning
    • Transportation and delivery conditions
    • Field preparations
    • Controls & tests according procedures

    Day 5

    • Periodical Controls, Tests and Maintenance
    • Maintenance plan and inspection
    • Electrical tests
    • Oil quality tests
    • DGA
    • Maintenance principles (removing oil leakages, bushing, radiator, etc...)

    Day 6

    • Protections and Troubleshooting
    • Buchholz relay
    • Other protective devices
    • Failures

On Load Tap Changers’ Operation & Maintenance

Duration: 4 days |  Level: Intermediate

This course aims to enable participants in developing their knowledge and skills in the Operation & Maintenance of On Load Tap Changers (OLTC). The learner will develop a broad technical understanding of what power transformers with OLTC are today. At the conclusion of the course, the participants will have attained an increased level of knowledge in the design, operation, and maintenance of OLTC. The course includes one year of access to S3601, e-Learning training programs, accessible 24/7 through our LMS (if required).


This course is designed for EMS Maintenance Engineers and members of Operation & Maintenance teams.

  • Course Objectives:

    At the end of this course participants will be able to

    • Understand the OLTC technology.
    • Ensure the operation of transformers with OLTC.
    • Ensure appropriate maintenance according to OLTC types.

  • Course Content

    • On Load Tap Changer Mechanisms
    • Practical Work and Maintenance – All Aspects

  • Programme Schedule

    Day 1

    • On Load Tap Changer Mechanisms
    • The selector switch
    • The diverter switch
    • The motor drive unit

    Day 2

    • Practical Work and Maintenance
    • Remove the diverter switch (insert) from chamber
    • Replacement of worn mechanical parts (springs, etc...)
    • Maintenance/replacement of electrical contacts
    • Measuring the transition resistors
    • Cleaning devices

    Day 3

    • Practical Work and Maintenance - Following
    • Insert the diverter switch into chamber
    • Filling with oil
    • TTR measurements
    • Adjusting the axis

    Day 4

    • Practical Work and Maintenance - Following
    • Electrical and mechanical locking control
    • Protective relay/pressure relay and PRV tests

Vertical-break, Center-break & Pantograph Disconnectors & Earthing Switches from 52 kV to 550 kV

Duration: 3 days |  Level: Intermediate

This course aims to enable participants in developing their knowledge and skills in Vertical-break, Center-break, and Pantograph Disconnectors & Earthing Switches that range from 52 kilovolts to 550 kilovolts. The learner will develop their understanding of the design and operation of disconnectors and earthling switches, and the course will provide immediate practice of the theoretical knowledge acquired.


This course is designed for installation personnel, foremen and supervisors, and technicians and engineers who are responsible for the installation and operation of high voltage switchgears.

  • Course Objectives:

    At the end of this course participants will be able to

    • Become familiar with the design and operation of disconnectors and earthing switches, and with the associated motor and manual drives.

  • Course Content

    • Introduction
    • Design and Operation
    • Installation
    • Tests

  • Programme Schedule

    Day 1

    • Introduction to Disconnectors and Earthing Switches
    • Definitions
    • Fundamentals
    • General aspects

    Day 2

    • Design and Operation
    • Conducting paths
    • Base frames
    • Linkages

    Day 3

    Installation

    • On-site installation and commissioning safety instructions and procedures
    • Maintenance concept, including inspection
    • Maintenance and repair criteria and scheduling

    Tests

    • Performance analysis
    • Measurement result

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