Course Description
Installation of high voltage distribution and transmission equipment has increased significantly over the years due to ongoing global demand for power. As a result, the need to ensure the reliability of operation of power systems is paramount. Power transformers are among the most important and most expensive components of power systems, their failure can impose extraordinarily high costs on plants, factories and utilities of all descriptions. This course provides knowledge on both the theory and operation of Power Transformers. The course will develop and enhance an understanding of what is involved in the maintenance of these essential components of the power systems, through the tips and tricks learnt and developed by some of the World's pre-eminent electrical engineers
Course Objectives
- Gaining a thorough understanding of the operating characteristics of transformers
- Being familiar with the different tests required for the various types of transformers
- Learning the maintenance and troubleshooting activities
- Being familiar with the various methods used to repair and refurbish transformers
- Being able to maximize the efficiency, reliability, and longevity of transformers
- Understanding the calculations and sizing techniques used for transformers
- Learning how to select transformers to best fit with their purpose
Who Should Attend?
- Technicians
- Maintenance personnel
- Electricians
- Electrical supervisors
- Project engineers
- Engineers of all disciplines
- Other technical individuals
Course Details/Schedule
Transformer Theory and Fundamentals
- Alternating current system
- Magnitude of voltage
- Inductive circuit
- Electricity magnetism
- Magnetic material
- Electricity and magnetism terms
- Transformer principle
- Permeability and magnetizing characteristics
- Hysteresis loop
- Transformer inrush currents
- Phasor diagram of transformer
- Three phase vector
- Transformer rating
- Transformer impedance
- Three phase transformer
Transformer Types and Classifications
- Power transformers
- Distribution transformers
- Phase-shifting transformers
- Rectifier transformers
- Dry-type transformer
- Instrument transformers
- Step-voltage regulators
- Air cooled oil- immersed
- Temperature limits
Maintenance and Operation of Transformers
- Transformer operation and maintenance
- Transformers in services
- Transformer inspection
- Tap changer maintenance
- Parallel operation
Transformer Testing
- DC winding resistance test
- Winding insulation test
- Polarity test
- No load test
- Short circuit test
- Impedance test
- Moisture in transformer
- Measurement of moisture content
- Treatment of moisture
- Oil Dielectric testing
Transformer Protection
- Need for earthing
- Earthing methods
- Types of faults
- Deferential protection
- Over current protection
- Restricted earth fault protection
