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Electric Stress Control in Cable, Joints & Terminations

Electric Stress Control in Cable, Joints & Terminations

How to Control Electric Stress in Cable Joints & Terminations? Introduction Power cables are of great importance in power transmission and distribution systems. Terminations and joints are the basic accessories of the power cables and they are required to make connections between lines or to an electrical apparatus. The various aspects are considered while designing the cable terminations and joints …

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Busbars and Connectors in HV and EHV installations

Tubular busbar

Busbars and Connectors in Indoor & Outdoor Installations What is Electric Busbar? A conductor or group of conductor used to collect the power from incoming feeders and distribute to the outgoing feeders is known as busbar. In other words, Busbar is a junction where the incoming  and outgoing feeders current meets i.e. it collects the power at single point. Busbars …

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Overhead Lines Protection – Faults & Protection Devices

Overhead Lines Protection - Faults & Protection Devices

Overhead Lines Faults & Protection in Power System Common Faults in Overhead Lines The most common causes of faults in overhead lines are: Aircraft and cars hitting lines and structures Birds and animals Contaminated insulators Ice and snow loading Lightning Partial discharges (corona) not controlled Punctured or broken insulators Trees Wind Related Article: Power Transformer Protection & Faults Overhead Lines …

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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 …

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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 …

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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 …

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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 …

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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 …

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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 …

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