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# Alternating Current

## 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 they have their implementation in energizing process of capacitors banks, overhead lines and cables. Capacitors banks switching are known to be cause of very large value of transient voltage across …

## Three Phase Current Values in a 3-Phase System

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 arrow symbols shown alongside three phase current (IR, IY and IB) in fig 1 and 2 does not indicate the currents directions in a particular moment but shows the current directions …

## Advantages of Power factor improvement and Correction

Advantages of Power factor improvement and Correction: Following are the merits and benefits of improvedPower factor; Increase in efficiency of system and devices Low Voltage Drop Reduction in size of a conductor and cable which reduces cost of the Cooper An Increase in available power Line Losses (Copper Losses) I2R is reduced Appropriate Size of Electrical Machines (Transformer, Generators etc) …

## Ohm’s Law with simple explanation

Ohm’s Law The relationship between Current through and Voltage across a conductor was first discovered by a German scientist George Simon Ohm. This relationship is called Ohm’s Law and be stated as; The Current “I” flowing through a conductor is directly proportional to the potential difference i.e. Voltage “V” across its ends provided the physical conditions (i.e. temperature, strain, etc) do …

## Alternating Current Library

Alternating Current Library A (50/60 Hz) Transformer. Which one will give more Output? (When operates on 50 or 60 Hz frequency A Very Simple Generator / Alternator (Dynamic Model from Trash) Active, Reactive, Apparent and Complex Power. Simple explanation with formulas All about Power Factor, Disadvantages and improvement Basic Electrical Formulas Capacitors(MCQs with Explanatory Answers) Electrical Formulas AC & DC …

## How to Calculate/Find the Rating of Transformer in kVA (Single Phase and Three Phase)?

How to Calculate/Find the Rating of Transformer in kVA (Single Phase and Three Phase)? We know that, Transformer always rated in kVA.  Below are the two simple formulas to find the rating of Single phase and Three phase Transformers. Find Rating of Single Phase Transformer Rating of Single Phase Transformer: P = V x I.   Rating of a single …

## Power Factor

1).  The Cosine of angle between Current and Voltage is called Power Factor.P = VI Cosθ ORCosθ = P / V I ORCosθ = kW / kVACosθ = True Power/ Apparent Power 2). The ratio between resistance and Impedance is Called Power Factor.Cosθ = R/Z 3). The ratio between Actual Power and Apparent Power is called power factor.Cosθ = kW / kVAyou …

## Active, Reactive, Apparent and Complex Power. Simple explanation with formulas.

Active, Reactive, Apparent and Complex Power. Simple explanation with formulas. (1) Real Power: (P)  Alternative words used for Real Power (Actual Power, True Power, Watt-full Power, Useful Power, Real Power, and Active Power) In a DC Circuit, power supply to the DC load is simply the product of Voltage across the load and Current flowing through it i.e., P = …