fbpx
Breaking News
Home » Over Head Lines

Over Head Lines

HV And MV Switch Disconnectors And Isolators in Power System

HV And MV Switch Disconnectors And Isolators in Power System

HV/MV Switch Disconnectors And Isolators in Substation & Overhead Lines Introduction HV/MV Switch Disconnectors And Isolators High Voltage (HV) and Medium Voltage (MV)[1] installations require equipments to switching and/or isolating circuits or parts of circuits. For that purpose switch-disconnectors and isolators are used. These equipments must comply with the following IEC[2] Standards: 60038 – IEC standard voltages 61936-1 – Power …

Read More »

Design and Installation of EHV/EHV and EHV/HV Substations

Design and Installation of EHVHV and EHVHV Substations - Types and Configurations

Types and Configurations of EHV/EHV and EHV/HV Substations The Role of EHV/EHV and EHV/HV Substations in Transmission Network EHV/EHV and EHV/HV[1] substations are an important element of the electricity transmission network of a country or of a large area of a country and their functions are: Interconnection of power plants of the national or area electrical grid. Step up and …

Read More »

All About Electrical Protection Systems, Devices And Units

Electrical Protection Systems And Units

Electrical Protection Units And Systems Introduction to Electrical Protection Systems HV, MV and LV[1] electric installations and equipments are subjected to internal and external faults that can cause serious damages in persons and other equipments. To avoid and to minimize the consequences of those faults protection devices associated to equipments that are able to break electric current are required. For …

Read More »

Insulating And Dielectric Materials – Types, Properties & Applications

Types, Properties & Applications of Insulating And Dielectric Materials

An Introduction to Insulating And Dielectric Materials Definition of Insulating and Dielectric Materials An electrical insulating material can be defined as the material that does not allow electric current to pass through it. For electrical applications a particular category of insulating materials is used to separate electrically the conducting parts of equipment from each other and from earthed and “no …

Read More »

Corona Effect in Transmission Lines & Power System

A Full Guide about Corona Effect - Corona Discharge in Transmission Lines

A Full Guide about Corona Effect – Corona Discharge in Transmission Lines What is Corona or Corona Discharge? When an alternating potential difference is applied across two conductors whose spacing is large as compared to their diameters, there is no apparent change in the condition of atmospheric air surrounding the wires if the applied voltage is low. However, when the …

Read More »

Short Circuit Currents And Symmetrical Components

Short Circuit Currents faults 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 and overvoltages, mechanical stress and chemical corrosion are the main factors for dielectric breakdown) Decrease of creepage distance (the shortest path between two conductive parts – or between a conductive …

Read More »

Why Power Transmission Cables & Lines are Loose on Electric Poles & Transmission Towers?

Why Power Transmission Cables & Lines are Loose on Electric Poles & Transmission Towers?

INTRODUCTION Transportation of people, goods and services today is no longer a problem as technology is fast growing. Distance is neither a barrier nor a problem. Just as people, goods and services are easily transported across a distant destination, ELECTRICITY is no different. Electricity can be transported over a long distance. But unlike goods, electricity requires a medium through which …

Read More »

How to Calculate the Suitable Capacitor Size in Farads & kVAR for Power factor Improvement

How to Calculate the Suitable Capacitor Size in Farads & kVAR

 How to Calculate the Suitable Capacitor Size in Farads & kVAR for Power factor Improvement  (Easiest way ever) Hi there! With a very important tutorial.. I hope you will find it very useful because I have already spent two days to prepare this article. I think all of those who have sent messages and mails about the topic will never …

Read More »

How to Convert Capacitor Farads into kVAR & Vice Versa (For Power factor improvement)

How to Convert Capacitor Farads into kVAR & Vice Versa For Power factor

How to Convert Capacitor Farads into kVAR & Vice Versa for Power factor improvement? How to Calculate the Required Capacitor bank value in both kVAR and Farads? (How to Convert Farads into kVAR and Vice Versa) How to Convert Capacitor Farads into kVAR & Vice Versa (For Power factor improvement) In this simple Calculation tutorial, we will find the way …

Read More »

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) …

Read More »