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Archive: Category «High Voltage»

High Voltage

Methods of Controlling Lightning Overvoltages in HV

For well shielded transmission lines, the backflashover condition, close to the substation, is of prime concern for determining the location and number of surge arresters required to achieve insulation coordination… Read more

Dec 08, 2012 | By Edvard Csanyi

Methods of Controlling Lightning Overvoltages in HV
High Voltage

HV Instrument Current Transformers in T&D

Electrical measurements on a high-voltage transmission and distribution systems cannot be made practically or safely with direct contact to the power carrying conductors. Instead, the voltages and currents must be… Read more

Nov 23, 2012 | By Edvard Csanyi

HV Instrument Current Transformers in Transmission and Distribution Systems
High Voltage

The Purpose of High Voltage Circuit Switchers

Circuit switchers have been developed to overcome some of the limitations of fusing for substation power transformers. Circuit switchers have SF6 gas interrupters and are designed to provide three-phase interruption… Read more

Nov 16, 2012 | By Edvard Csanyi

Vertical interrupter circuit switcher without integral disconnect switch
High Voltage

Electrical Safety Standards for LV/MV/HV (Part-3)

Continued from part 2 – Electrical Safety Standards for LV/MV/HV (Part-2) Standard: Northern Ireland Electricity (NIE), 6/025 ENA Code: Indian Electricity Rules / Central Electricity Authority Right of Way Clearance… Read more

Nov 14, 2012 | By jiguparmar

Electrical Safety Standards for LV/MV/HV part 3
High Voltage

Electrical Safety Standards for LV/MV/HV (Part-2)

Continued from part 1 – Electrical Safety Standards for LV/MV/HV (Part-1) Standard: Northern Ireland Electricity (NIE), 6/025 ENA Clearances of Electrical Line to Ground and Roads Clearances of Electrical Line… Read more

Nov 12, 2012 | By jiguparmar

Electrical Safety Standards for LV/MV/HV part 2
High Voltage

Electrical Safety Standards for LV/MV/HV (Part-1)

Standard: Western Power Company Water Safely Clearance on Electrical Fires Minimum Approach Distance for Authorized Person Minimum Approach Distance for Ordinary Person Minimum Approach Distance for Vehicle and Plant for… Read more

Nov 07, 2012 | By jiguparmar

Electrical Safety Standards for LV/MV/HV (Part-1)
High Voltage

Design of Overhead Transmission Line Foundation

The foundation is the name given to the system which transfers to the ground the various steady state (dead) and variable (live) loads developed by the transmission tower and conductors…. Read more

Sep 19, 2012 | By Edvard Csanyi

Design of Overhead Transmission Line Foundation
High Voltage

Primary Distribution Voltage Levels

Most distribution voltages are between 4 and 35 kV. In this article, unless otherwise specified, voltages are given as line-to-line voltages; this follows normal industry practice, but it is sometimes… Read more

Aug 10, 2012 | By Edvard Csanyi

Primary Distribution Voltage Levels
High Voltage

The Structure Of Power System

An interconnected power system is a complex enterprise that may be subdivided into the following major subsystems: Generation Subsystem Transmission and Subtransmission Subsystem Distribution Subsystem Utilization Subsystem Generation subsystem includes… Read more

Aug 09, 2012 | By Edvard Csanyi

The structure of power system
High Voltage

Shunt Reactor Used In HV and EHV Systems

Main Power System parameters are System Voltages and Frequency which normally indicate the healthiness level (they indicate the level of Generated active and reactive Powers against the load power requirement)…. Read more

Jul 17, 2012 | By Edvard Csanyi

345kV Shunt Reactor and Associated Primary Equipment
High Voltage

Autoreclosing in Transmission and Distribution Systems

Two main functions of Utility Electric System Operations department are Control and Protection. Control function deals with all operational aspects involved in efficient and optimal dispatching of available real power… Read more

Jul 15, 2012 | By Edvard Csanyi

Autoreclosing in transmission and distribution systems
High Voltage

Transmission and Distibution Overhead Circuit Faults

Overhead (OH) Transmission circuits are usually HV level (110kV or 115kV and more) to EHV levels (230kV and beyond) and UHV levels (765kV and beyond). OH Distribution systems involve sub-transmission… Read more

Jul 11, 2012 | By Edvard Csanyi

Types of transmission and distibution overhead circuit faults
High Voltage

FACTS – Flexible AC Transmission Systems

The acronym FACTS stands for “flexible AC transmission systems”. These systems add some of the virtues of DC, i.e., phase independence and fast controllability, to AC transmission by means of… Read more

Jun 21, 2012 | By Edvard Csanyi

FACTS - Flexible AC Transmission Systems (SIEMENS)


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