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Is Reactive Power Useful? Importance of Reactive Power

What is Reactive Power and Why it is Useful?  In recent years, the reactive power control has been the subject of a systematic study as it plays an important role in maintaining a secure voltage profile in a large scale transmission system. Though it is a byproduct of alternating current systems, it is needed for the acceptable functioning of various …

Maximum Power Transfer Theorem for AC & DC Circuits

Maximum Power Transfer Theorem for AC & DC Circuits Introduction to Maximum Power Transfer Theorem Very often we come across various real time circuits that works based on maximum power transfer theorem. For effective way of connecting source to load, an impedance matching transformer is used. In case of transmission lines, the distortion and reflections are avoided by making source …

Comparison between Star and Delta Connections

Comparison between Star and Delta Connections Comparison between Star (Y) and Delta (Δ) Connections Star (Y) Connection Delta (Δ) Connection In STAR connection, the starting or finishing ends (Similar ends) of three coils are connected together to form the neutral point. A common wire is taken out from the neutral point which is called Neutral. In DELTA connection, the opposite …

Delta Connection (Δ): 3 Phase Power, Voltage & Current Values

Delta Connection  (Δ) In this system of interconnection, the starting ends of the three phases or coils are connected to the finishing ends of the coil. Or the starting end of the first coil is connected to the finishing end of the second coil and so on (for all three coils) and it looks like a closed mesh or circuit …

Star Connection (Y): Three Phase Power, Voltage & Current Values

Star Connection (Y) In this kind of interconnection, the starting ends or finishing ends (Similar ends) of three coils are connected together to form the neutral point. Or Star Connection is obtained by connecting together similar ends of the three coils, either “Starting” or “finishing”. The other ends are joined to the line wires. The common point is called the …

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 …

Basic Magnetic Terms definition with Formulas

Magnetic and Magnetism Important terms definition and formulas Magnetic field or Magnetic Induction (B) Magnet or Electromagnet produces a Magnetic field. The field where the magnet attracts or repels magnetic materials such as iron, steel, etc. it may be defined as a force on a moving charge, F=q x v x B Where      F= Force,      V = Speed …

Electric circuits / Networks and important terms related to it you must know

Electrical Network Combination of different electric elements or components which are connected in any way is called electric network Complex Networks A Circuit which contains on many electrical elements such as resistors, capacitors, inductors, current sources and Voltage source (both AC and DC) is called Complex network. These kinds of networks can’t be solved easily by simple ohm’s Law or …

How to determine the number of Nodes, Branches, Loops and Meshes in a Circuit?

Solving and analyzing electrical circuits and networks, you must know about Nodes, Branches, Loops and Meshes. So we are here with a simple tutorial ever to find all these terms in electric circuits. Node A point or junction where two or more circuit’s elements (resistor, capacitor, inductor etc) meet is called Node Branch That part or section of circuit which …

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) …