Energy and Power
The Need for Breaker Failure Protection
Circuit breakers are strategically located in power systems to connect circuits and electrical apparatus. Circuit breakers are commanded to open and close by protection and control systems that monitor conditions… Read more
Jan 01, 2012 | By Edvard Csanyi
Energy and Power
Using Core-Balance Current Transformer For Earth Fault Protection
The core-balance current transformer (or CBCT) is normally of the ring type, through the centre of which is passed cable that forms the primary winding. An earth fault relay, connected… Read more
Dec 28, 2011 | By Edvard Csanyi
Energy and Power
What psychological effect does an electric shock?
Most of us have experienced some form of electric ”shock”, where electricity causes our body to experience pain or trauma. If we are fortunate, the extent of that experience is… Read more
Dec 25, 2011 | By Edvard Csanyi
Energy and Power
What is HIPOT Testing (Dielectric Strength Test)?
Hipot Test is short name of high potential (high voltage) Test and it is also known as Dielectric Withstand Test. A hipot test checks for “good isolation.” Hipot test makes… Read more
Dec 22, 2011 | By jiguparmar
Energy and Power
Earthing in electrical network – purpose, methods and measurement
The main reason for doing earthing in electrical network is for the safety. When all metallic parts in electrical equipment are grounded then if the insulation inside the equipment fails… Read more
Dec 19, 2011 | By jiguparmar
Electrical Lectures
What is the resonance phenomena?
The use of both capacitive and inductive devices in distribution systems leads to resonance phenomena, resulting in extremely high or low impedance values. These variations in impedance modify the current… Read more
Dec 09, 2011 | By Edvard Csanyi
Energy and Power
Flexible AC Transmission System – What and Why?
Flexible AC Transmission System (FACTS) have been evolving to a mature technology with high power rating. This technology has wide spread application, became a top rate, most reliable one, based… Read more
Dec 05, 2011 | By Edvard Csanyi
Electric Motor
5 steps to choose the best motor for your application
For line-operated motors, loads fall into three general categories: constant torque, torque that changes abruptly, and torque that change gradually over time. Bulk material conveyors, extruders, positive displacement pumps, and… Read more
Dec 03, 2011 | By Edvard Csanyi
Energy and Power
Guideline to Design Electrical Network for Building (Small Area)
Find out built up area in Sqft.of per flat per House/Dwelling unit. Multiply area in Sqft. by Load/Sqft according to following table: Type of Load Load/Sqft Industrial 100 Watt/Sqft Commercial… Read more
Dec 02, 2011 | By jiguparmar
Energy and Power
Transient Voltage Surge Suppressors
Transient Voltage Surge Suppressor (TVSS) is a device that every data center or mission critical facility should have. Why should every data center have one and what does it do… Read more
Dec 01, 2011 | By Edvard Csanyi
Energy and Power
Overvoltages Caused by Direct Lightning Strokes
A lightning stroke is defined as a direct stroke if it hits either the tower or the shield wire or the phase conductor. This is illustrated in Figure 1. When… Read more
Nov 29, 2011 | By Edvard Csanyi
Cables
Fire Properties Of Cables
This is an area of increasing public and legislative concern, and therefore of increasing interest to engineers. There have been major advances in the fire performance of cables in recent… Read more
Nov 21, 2011 | By Edvard Csanyi
Cables
Partial Discharge Testing On Power Cable Systems
Partial discharge measurement is an important method of assessing the quality of the insulation of power cable systems, particularly for extruded insulation materials. This article considers partial discharge from two… Read more
Nov 18, 2011 | By Edvard Csanyi
Energy and Power
Demand Factor-Diversity Factor-Utilization Factor-Load Factor
Originally published at Electrical Notes – Articles Demand Factor = Maximum demand of a system / Total connected load on the system Demand factor is always less than one. Example:… Read more
Nov 14, 2011 | By jiguparmar
Energy and Power
Moving Iron Instruments – Voltmeter and Ammeter
Moving-iron instruments are generally used to measure alternating voltages and currents. In moving-iron instruments the movable system consists of one or more pieces of specially-shaped soft iron, which are so… Read more
Nov 13, 2011 | By Bipul Raman
