Energy and Power
Circuit breakers classified by interrupting medium
A circuit breaker is defined as “a mechanical switching device capable of making, carrying and breaking currents under normal circuit conditions and also making, carrying and breaking for a specified… Read more
Jun 20, 2012 | By Edvard Csanyi
High Voltage
Reducing Distribution Line Losses
One of the main benefits of applying capacitors is that they can reduce distribution line losses. Losses come from current through the resistance of conductors. Some of that current transmits… Read more
Jun 19, 2012 | By Edvard Csanyi
Cables
Measurement of insulation resistance (IR)
The measurement of insulation resistance is a common routine test performed on all types of electrical wires and cables. As a production test, this test is often used as a… Read more
Apr 28, 2012 | By jiguparmar
Energy and Power
Single-Phase Power vs Three-Phase Power
The principal elements of an electric power system are the generating stations, the transmission lines, the substations, and the distribution networks. The generators produce the electricity, the transmission lines move… Read more
Apr 01, 2012 | By Edvard Csanyi
High Voltage
Substation Main Functions and Classification
An electrical substation is an assemblage of electrical components including busbars, switchgear, power transformers, auxiliaries etc. These components are connected in a definite sequence such that a ckt. can be… Read more
Mar 29, 2012 | By Edvard Csanyi
High Voltage
How HV transmission lines affects humans and plants?
By increasing population of the world, towns are expanding, many buildings construct near high voltage overhead power transmission lines. The increase of power demand has increased the need for transmitting… Read more
Mar 20, 2012 | By jiguparmar
High Voltage
Using HVDC Technology For Transmitting Electricity
An alternate means of transmitting electricity is to use high-voltage direct current (HVDC) technology. As the name implies, HVDC uses direct current to transmit power. Direct current facilities are connected… Read more
Mar 05, 2012 | By Edvard Csanyi
High Voltage
Protection and Relays Used In Main Circuit Board at a Power Grid Substation
The DMH type relay provides high speed biased differential protection for two or three winding transformers. The relay is immune to high inrush current and has a high degree of… Read more
Feb 17, 2012 | By Bipul Raman
High Voltage
Protection Of Generators And Transformers
As Generators and transformers are major components of a power system, so it is quite necessary to take all the preventive measures for the protection of transformers and generators. These… Read more
Feb 11, 2012 | By Bipul Raman
High Voltage
Ceramic (Porcelain and Glass) Insulators
Porcelain is the most frequently used material for insulators. Insulators are made of wet, processed porcelain. The fundamental materials used are a mixture of feldspar (35%), china clay (28%), flint… Read more
Jan 27, 2012 | By Edvard Csanyi
Cables
EHV/HV Underground Cable Sheath Earthing (part 2/2)
Continued from previous part: EHV/HV Cable Sheath Earthing (part 1/2) Link Box is electrically and mechanically one of the integral accessories of HV underground above ground cable bonding system, associated… Read more
Jan 21, 2012 | By Edvard Csanyi
Cables
EHV/HV Underground Cable Sheath Earthing (part 1/2)
In urban areas, high voltage underground cables are commonly used for the transmission and distribution of electricity. Such high voltage cables have metallic sheaths or screens surrounding the conductors, and/or… Read more
Jan 19, 2012 | By jiguparmar
High Voltage
Segregated Phase Bus System
In this construction all the phases are housed in one metallic enclosure as earlier, but with a metallic barrier between each phase, as illustrated in Figure 1. The metallic barriers provide the required… Read more
Jan 18, 2012 | By Edvard Csanyi
Cables
Direct high voltage testing of cable insulation systems
DC testing has been accepted for many years as the standard field method for performing high-voltage tests on cable insulation systems. Whenever DC testing is performed, full consideration should be… Read more
Nov 19, 2011 | By Edvard Csanyi
High Voltage
North American versus European distribution systems
Distribution systems around the world have evolved into different forms. The two main designs are North American and European. For both forms, hardware is much the same: conductors, cables, insulators,… Read more
Nov 17, 2011 | By Edvard Csanyi
