The auto reclosing of power lines has become a generally accepted practice. Reports from different parts of the world show that in certain networks in regions subject to a high lightning intensity only about 5 percent of the faults are … Continue Reading about Auto Reclosing of Power Lines
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Electrical Machines
Armature Reaction in DC Generator
To understand the concept of armature reaction in DC generator, please go through the previous articles describing the construction of a DC generator. … Continue Reading about Armature Reaction in DC Generator
Star-Star (Y-Y) Connection of Three Phase Transformers
There are different types of connection employed for three-phase transformers. The star-star (Y-Y) connection of three-phase transformers is the most … Continue Reading about Star-Star (Y-Y) Connection of Three Phase Transformers
Power System
Substation Earthing System Design
We have already given an introduction to substation earthing system in an article published earlier. Today we are going to discuss about the … Continue Reading about Substation Earthing System Design
Load Curve in a Power Plant – Daily, Monthly and Annual
A load curve is a plot of the load demand (on the y-axis) versus the time (on the x-axis) in the chronological order. It is a curve showing the … Continue Reading about Load Curve in a Power Plant – Daily, Monthly and Annual
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Square D QO Circuit Breakers
QO stands for Qwik-Open. Square D QO Circuit Breakers are fastest tripping circuit breakers at 1/60th of a second. QO™ Circuit Breakers provide the high level of protection you expect from Square D. When it comes to electrical protection, fast response is critical and QO™ Circuit Breakers can … Continue Reading about Square D QO Circuit Breakers
Latest Articles

Bundled Conductors in Transmission Lines
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Bundled conductors are commonly used to increase electrical capacity and reduce corona and radio noise at voltages above 200 kV. Though the … Continue Reading about Bundled Conductors in Transmission Lines

Measurement of Three Phase Power | Wattmeter Methods
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This article explains the measurement of three-phase power in star connected or delta connecter load using the wattmeter methods. The power in … Continue Reading about Measurement of Three Phase Power | Wattmeter Methods

Types of Underground Cables
In practice, different types of underground cables are generally required to deliver 3-phase power. For the purpose, either three-core cable or three … Continue Reading about Types of Underground Cables

What is Circuit Breaker – Working Principle and Arcing Phenomenon
What is a Circuit Breaker? As the name indicates, circuit breaker means the device which breaks (Open) the circuit under the abnormal condition and … Continue Reading about What is Circuit Breaker – Working Principle and Arcing Phenomenon

What is an HVDC (High Voltage Direct Current) Transmission System?
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HVDC stands for High Voltage Direct Current. An HVDC electric power transmission system uses direct current for the bulk transmission of electrical … Continue Reading about What is an HVDC (High Voltage Direct Current) Transmission System?

4 Major Types of Electrical Substations
The assembly of the apparatus used to change some characteristic (e.g. voltage, a.c. to d.c., frequency, p.f etc.) of electric supply is called a … Continue Reading about 4 Major Types of Electrical Substations

Starting Methods for Synchronous Motor
Synchronous motors are not self-starting. Some additional devices should be used to start the motor. Basically, there are two methods for … Continue Reading about Starting Methods for Synchronous Motor

Need of a Starter (3 & 4 Point) in DC Motors
We use 3 and 4 point starters in DC motors. What happens if a DC motor is started without a starter? Let's check it. Consider a dc motor at … Continue Reading about Need of a Starter (3 & 4 Point) in DC Motors