Electromagnetic forces interact with electrically charged particles and electromagnetic fields; this course will study how these forces lead to voltage & current transformation. Ratios and polarity is also studied leading to the introduction of potential transformers & current transformers, and their use in conjunction with the relevant instruments such as ammeters, voltmeters, watt meters and energy meters. Transformer core construction along with losses & cooling mitigation techniques. 3 phase transformer configurations are studied along with harmonic distortion, CT saturation and on-load tap-changer problems and how these problems are dealt with. Over-current and restraint differential transformer protection is developed along with a look at some examples of " Old School relays" as well as modern IDE (intelligent Electrical Devices) relays. Transformer Connections: (Y – Y; Delta - Delta; Y - Delta; Delta - Y & Y - Zag Zig) are examined along with Transformer Clock System Vector Nomenclature. Oil Analysis and the Buchholz Relay are also studied. Duration: 5hr 37min of video content Prerequisites: Basic Electrical; Mathematics; Trigonometry

Learning Objectives:

• Electromagnetism,
• Voltage & Current Transformation
• Ratios and Polarity
• Potential & Current Transformers
• 3 Phase Transformers Construction
• Transformer Classifications
• Losses & Cooling
• Per Unit Equivalent Circuits
• 3rd Harmonic Currents problems
• Tertiary Windings
• The Buchholz Relay
• Oil Analysis
• Transformer Connections: Y – Y, Delta - Delta, Y - Delta, Y - Zig-Zag
• Transformer Over-Current Protection
• Transformer Differential Protection
• Relays old and new