Hosted by: Orlando Giraldo / Basic level
Join us for the second lesson of the Basic level of the Introduction to transformers course by Mr Orlando Giraldo.
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This lesson will cover a large area, including:
•The need of transformers – Transmitting electric energy at high voltages.
• Old radial systems and new microgrids and smart grids concept. Distributed generation.
• Basic concepts of the electromagnetic theory applied to transformers: magnetic field, magnetic flux, magnetomotive force, permeability of magnetic materials. Basic problems of applications. Exercises.
• Definition of a transformer (the basics of):
o Principles of operation
o Constructive characteristics
o Magnetic circuit and hysteresis cycle
o Windings and electrical circuit
• The insulating structure cooling methods and cooling system working characteristics of a transformer.
• No-load operation: losses and excitation current
• Under load operation: the war of the fluxes. Load losses and transformer ratios.
• Phenomena that occur in an energized transformer
• Forces between windings
• Magnetostriction
• Leakage flux
• Transformer heating
• Standards and regulations: IEEE, IEC, national standards, etc.
• Classification of transformers: review of 22 different of transformer types according to:
o Localization in the electric circuits
o Type of Insulation
o Voltage and power ranges
About the author
Orlando Giraldo
Orlando Giraldo has acquired the title of electrical engineer from the Technological University of Pereira, Colombia, and finance specialist from the EAFIT University. He has worked for over 46 years of at different positions in the transformer-related areas in ABB (13 years), SIEMENS (14 years) and THE HJ FAMILY OF COMPANIES
(the last 21+ years) on: design, production, tests, sales, etc., of transformers and components. He has also completed multiple training visits to transformer and component plants around the world. Mr. Giraldo is a specialist in transformer production, componentsand protection. For the last two years, he has been working as senior consulting engineer of THE H-J FAMILY OF COMPANIES and teacher of Transformer course in the Technological University of Pereira.