Aluminium or copper busbar trunking? Myth busted!
Following years of copper being the material of choice for high power busbar trunking in the UK, yet aluminium reigning supreme in the rest of the world, Schneider Electric takes… Read more
Oct 19, 2011 | By Edvard Csanyi
Complete overview of lightning arresters (part 3)
Continued from article Complete overview of lightning arresters (part 2) There are several types of lightning arresters in general use. They differ only in constructional details but operate on the… Read more
Oct 08, 2011 | By jiguparmar
What would be the cost of micro hydro plant?
In the examples examined in the five countries, the capital cost13 of micro hydro plants, limited to shaft power, ranged from US$714 (Nepal, Zimbabwe) to US$1,233 (Mozambique). The average cost… Read more
Oct 07, 2011 | By Edvard Csanyi
Complete overview of lightning arresters (part 2)
Continued from article Complete overview of lightning arresters (part 1) Surge arresters are devices that help prevent damage to apparatus due to high voltages. The arrester provides a low-impedance path… Read more
Sep 29, 2011 | By jiguparmar
Understanding Transformer Polarity
With power or distribution transformers, polarity is important only if the need arises to parallel transformers to gain additional capacity or to hook up three single-phase transformers to make a… Read more
Sep 23, 2011 | By Edvard Csanyi
Understanding Underground Electric Transmission Cables
Underground cables have different technical requirements than overhead lines and have different environmental impacts. Due to their different physical, environmental, and construction needs, underground transmission generally costs more and may… Read more
Sep 21, 2011 | By Bipul Raman
Want to live and use energy on Mars? Why not?
The problem of energy accessibility and production on Mars is one of the three main challenges for the upcoming colonisation of the red planet. The energetic potential on its turn… Read more
Sep 17, 2011 | By Edvard Csanyi
GIS vs AIS – Substation Earthing
Compressed SF6 gas used in MV and HV switchgears as an insulating medium has led to the development of compact gas-insulated substation (CIS) technology (figure 1). GIS , having many… Read more
Sep 12, 2011 | By Edvard Csanyi
What Is a Load Break Switch?
A load break switch is a disconnect switch that has been designed to provide making or breaking of specified currents. This is accomplished by addition of equipment that increases the… Read more
Sep 08, 2011 | By Edvard Csanyi
Oil-Filled Equipment in Substation – IEEE 980-1994 (R2001)
A number of electrical apparatus installed in substations are filled with oil that provides the necessary insulation characteristics and assures their required performance. Electrical faults in this power equipment can… Read more
Sep 07, 2011 | By Edvard Csanyi
Animal deterrents and security in substation
The vast majority of electrical utility substations designed to transform transmission voltages to distribution class voltages employ an open-air design. The configurations may vary, but usually consist of equipment that… Read more
Sep 05, 2011 | By Edvard Csanyi
Bus protection – Overcurrent differential
When selecting relays for bus protection, a major concern is the ability of the protective relaying scheme to restrain from tripping for close-in line faults. Tripping for bus faults, the… Read more
Aug 31, 2011 | By Edvard Csanyi
Surge arrester types and auxiliary equipment
Nearly 100 years ago, electrode gaps (rod, sphere, or pipe) were used to limit overvoltages on equipment (Sakshaug, 1991). Some of these systems, particularly pipe gaps, may still be in… Read more
Aug 25, 2011 | By Edvard Csanyi
How to save electrical energy at home
In our home we use lot of electrical equipment like TV, Freeze, Washing machine, Mp3 player, music system, computer laptop. But we have not adequate knowledge for how to use… Read more
Aug 23, 2011 | By jiguparmar
Budgeting and Financing Substation
The construction of new substations and the expansion of existing facilities are commonplace projects in electric utilities. However, due to the complexity, very few utility employees are familiar with the… Read more
Aug 16, 2011 | By Edvard Csanyi