Energy and Power
Installation of Distribution-to-Utilization Voltage Transformers
Aerial transformer installations may utilize a three-phase unit or banked single-phase units. Transformers, either singly or in banks, having an individual unit or combined capacity greater than 300 kVA will… Read more
Nov 11, 2011 | By Edvard Csanyi
Energy and Power
Medium voltage circuit breaker operating sequence
Rated switching sequence according to IEC, O – t – CO – t’ – CO. (cf. opposite diagram): O – Represents opening operation CO – Represents closing operation followed immediately… Read more
Nov 10, 2011 | By Edvard Csanyi
Transformers
Sources of Sound in Transformers
Unlike cooling-fan or pump noise, the sound radiated from a transformer is tonal in nature, consisting of even harmonics of the power frequency. It is generally recognized that the predominant… Read more
Nov 09, 2011 | By Edvard Csanyi
Energy and Power
Working Principle of Earth Leakage Circuit Breaker (ELCB) and Residual Current Device (RCD)
Earth Leakage Circuit Breaker (ELCB) is a device used to directly detect currents leaking to earth from an installation and cut the power and mainly used in TT earthing systems…. Read more
Nov 07, 2011 | By jiguparmar
Electric Motor
DC motor and generator – design, application and operation
History will recognize the vital role played by DC motors in the development of industrial power transmission systems, the dc machine being the first practical device to convert electrical power… Read more
Nov 06, 2011 | By Edvard Csanyi
Biomass Energy
Biodiesel – Myths and Facts
Few facts you most probably know already, but never the less to mention: A clean burning alternative fuel, produced from domestic, renewable resources such as plant oils, animal fats, used… Read more
Nov 05, 2011 | By Bipul Raman
Lighting
Basic parameters used in lighting you should know
Abbreviation: φ phi Unit: lm lumen The luminous flux describes the quantity of light emitted by a light source. The luminous efficiency is the ratio of the luminous flux to… Read more
Nov 03, 2011 | By Edvard Csanyi
Protection
Transformer Winding Faults
A fault on a transformer winding is controlled in magnitude by the following factors: Source impedance Neutral earthing impedance Transformer leakage reactance Fault voltage Winding connection Several distinct cases arise… Read more
Nov 02, 2011 | By Edvard Csanyi
