Energy and Power
An Overview Of Short Circuit Current (part 2)
Continued from previous technical article: An Overview Of Short Circuit Current (part 1) Sub transient reactance Xd” is the apparent reactance of the stator winding at the instant short circuit… Read more
Feb 27, 2013 | By Asif Eqbal
Energy and Power
An Overview Of Short Circuit Current (part 1)
There are essentially four types of faults: three-phase, single line-to-ground, double line-to-ground, and line-to-line. Each of these types of faults can result in different magnitudes of fault current. In all… Read more
Feb 25, 2013 | By Asif Eqbal
Electrical Lectures
Super Capacitors – Different Than Others (part 1)
Capacitors store electric charge. Because the charge is stored physically, with no chemical or phase changes taking place, the process is highly reversible and the discharge-charge cycle can be repeated over… Read more
Feb 23, 2013 | By sravankumarpadala
Energy and Power
And Now Something We All Use – The Socket Outlets
A socket outlet is a female socket connected to the power wiring in the building and will accept the male plug attached at the end of the flexible cord of… Read more
Feb 22, 2013 | By Edvard
Medium Voltage
Things You Should Know About Medium Voltage GIS
Environmental Concerns Safety Concerns Special Handling Procedures Installation Concerns Operation and Maintenance Concerns End of Life / Recycling Concerns Conclusion Medium voltage (5-38 kV) gas insulated switchgear (GIS) differs greatly… Read more
Feb 20, 2013 | By Edvard
Testing and Commissioning
Transformer Routine Test – Measurement Of No-Load Loss And Current
The no-load losses are very much related to the operational performance of a transformer. As long as the transformer is operated, these losses occur. For this reason, no load losses… Read more
Feb 18, 2013 | By Edvard
Electric Motor
Direct Starting Of Squirrel-Cage Induction Motors
The direct starting (Direct On Line, DOL) is the simplest and most cost-efficient method of starting a motor. This is assuming that the power supply can easily deliver the high starting… Read more
Feb 16, 2013 | By Edvard
High Voltage
Using High-Speed Grounding Switches
Automatic high-speed grounding switches are applied for protection of power transformers when the cost of supplying other protective equipment is deemed unjustifiable and the amount of system disturbance that the… Read more
Feb 15, 2013 | By Edvard
Energy and Power
Medium Voltage Switchgear (2) – Selection of Switching Devices
Continued from first part: Medium Voltage Switchgear (1) – Basics of Switching Devices Switching devices are selected both according to their ratings and according to the switching duties to be… Read more
Feb 13, 2013 | By Emmanouil Angeladas
Energy and Power
The Basics of Switching Devices In Medium Voltage Switchgear (Part 1)
According to international rules, there are only two voltage levels: Low voltage: up to and including 1kV AC (or 1,500V DC) and High voltage: above 1kV AC (or 1,500V DC). Most electrical… Read more
Feb 11, 2013 | By Emmanouil Angeladas
Safety
How Do We Define Hazardous Areas?
The first requirement is to know what a hazardous area is. The principal factors relevant to the classifications of a hazardous area are the nature of the gases or dust… Read more
Feb 09, 2013 | By Edvard
Electric Motor
How Motor Really Works?
The basic working of a motor is based on the fact that when ‘a current carrying conductor is placed in a magnetic field, it experiences a force’. If you take… Read more
Feb 08, 2013 | By Edvard
Energy and Power
Did Tesla Discover the Secrets of Antigravity?
Nikola Tesla has been credited for the creation of much of the technology that we take for granted today. Without the genius of Tesla we would not have: Radio, Television,… Read more
Feb 06, 2013 | By Edvard
Wind Power
How to Monitor Wind Speed?
When considering wind power, most people ask what the average annual wind speed is and how to get that number. The usual response is that you must monitor the wind… Read more
Feb 04, 2013 | By Edvard
Protection
Connections Of Overcurrent Relay (part 2)
Continued from first part: Types and Applications Of Overcurrent Relay (part 1) It’s used for: 3-phase faults the overcurrent relays in all the 3-phases act. Phase to phase faults the… Read more
Feb 02, 2013 | By jiguparmar
