Alternating Current

Emergency Generator Set – Construction, Installation, Maintenance & Wiring

An Overview of Emergency Generator Set (Manuel Bolotinha) Introduction to Emergency Generator Set Hospitals, airports, shopping malls and office buildings, just to mention some examples, are very sensitive, in what…
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Short Circuit Currents And Symmetrical Components

Short Circuit Currents And Symmetrical Components (Manuel Bolotinha) Short Circuit Faults and Currents Short-circuits can occur phase-to-phase and phase-to-earth, mainly due to: Dielectric breakdown of insulating materials (ageing, severe overheating…
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High Inrush Current in Capacitor Switching and Ways to Prevent It.

How to Prevent the high Inrush Current in Capacitor Switching? Introduction to High Inrush Current in Capacitor Switching Applications of capacitance switching are not only restricted to capacitive currents but…
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Three Phase Current Values in a 3-Phase System

Division of Three Phase Current Values in a 3-Phase System The following points may be noted for understanding the division of Three Phase Current in a 3-Phase System 1. The…
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Q Factor in Electrical and Electronics Engineering

What is the ‘Q’ factor in Electrical and Electronics Engineering? Q Factor In a tuned circuit, the ratio between reactance and resistance is called the Q Factor or Quality Factor.…
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Advantages of Power Factor Improvement and Correction

Advantages of Improved Power Factor Power factor improvement and correction refer to the process of increasing the power factor of an electrical system by reducing the reactive power consumption. This…
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Ohm’s Law: Simple Explanation with Statement and Formulas

What is Ohm’s Law? Definition, Derivation, Limitation, Formula and Solved Example Ohm’s Law The relationship between current through a conductor and the voltage across it was first discovered by the…
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Alternating Current Library

Alternating Current (AC) Library Maintenance of Transformer – Power Transformers Maintenance, Diagnostic & Monitoring Emergency Generator Set – Construction, Installation, Maintenance & Wiring Short Circuit Currents And Symmetrical Components High…
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How to Size a Single Phase and Three Phase Transformer in kVA? Calculator

How to Calculate the Rating of Single Phase & Three Phase Transformers in kVA We know that a transformer is always rated in kVA. Below are the two simple formulas which…
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What is Power Factor (Cos ϕ) ? Cos fi or P.F Definition & Formulas

Power Factor Definitions and Formulas In electrical engineering, power factor is only and only related to AC circuits i.e. there is no power factor (P.f) in DC circuits due to…
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