Core Engineering
Electrical Engineering
Electrical machines, transformers, power systems, switchgear, protection, earthing and power quality.
Subcategories
Circuit Theory and Fundamentals2 ArticlesElectrical Machines and Motors2 ArticlesTransformers2 ArticlesPower Systems1 ArticleSwitchgear and Circuit Breakers1 ArticleProtection and Relays1 ArticleEarthing and Lightning Protection1 ArticlePower Quality and Power Factor1 ArticleWiring and Installation1 ArticleHigh Voltage Engineering1 Article
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Cable Sizing: Current Rating and Voltage Drop Explained Cable sizing explained: how to select a low voltage cable by current rating, derating, voltage drop and short-circuit withstand, with worked examples. Circuit Breaker Working Principle and Types Circuit breaker working principle explained: how a breaker detects faults and quenches the arc, the main types (MCB, MCCB, ACB, VCB, SF6) and key ratings. Electrical Earthing: Purpose, Types and Systems (TN, TT, IT) Electrical earthing explained: why systems are earthed, system and equipment earthing, TN, TT and IT systems, and earth electrode resistance. Generation, Transmission and Distribution of Electricity Generation, transmission and distribution of electricity explained: power stations, high voltage lines, substations and why high voltage reduces losses. Three-Phase Induction Motor Working Principle Induction motor working principle explained: rotating magnetic field, synchronous speed, slip and torque, plus construction, types and a worked example. Insulation Resistance Test (Megger Test) Explained How an insulation resistance test works, choosing the test voltage, reading the results, polarization index and temperature effects, with IEEE 43 guidance. Ohm's Law and Kirchhoff's Laws with Worked Examples Ohm's law and Kirchhoff's laws explained: V = IR, KCL and KVL, series and parallel circuits, and a fully checked worked example for students. Overcurrent Relay: Working Principle and Characteristics How an overcurrent relay works: pickup setting, instantaneous, definite time and IDMT characteristics, the IEC curve equation and time grading, with an example. Power Factor Explained: Causes, Effects and Correction What power factor is, the power triangle, why low power factor costs money, and how to size capacitors for power factor correction with a worked example. Transformer Working Principle, Construction and EMF Equation Transformer working principle explained: mutual induction, construction, the EMF equation E = 4.44 f N Φm, turns ratio and losses, with a worked example.
All Electrical Engineering articles
Transformer Losses and Efficiency Explained DC Motor Working Principle and Types Thevenin's Theorem: Steps and Solved Examples Cable Sizing: Current Rating and Voltage Drop Explained Circuit Breaker Working Principle and Types Electrical Earthing: Purpose, Types and Systems (TN, TT, IT) Generation, Transmission and Distribution of Electricity Three-Phase Induction Motor Working Principle Insulation Resistance Test (Megger Test) Explained Ohm's Law and Kirchhoff's Laws with Worked Examples Overcurrent Relay: Working Principle and Characteristics Power Factor Explained: Causes, Effects and Correction Transformer Working Principle, Construction and EMF Equation