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Monthly Archive for: «September, 2011»

How solar collectors works?

Solar energy (solar radiation) is collected by the solar collector’s absorber plates. Selective coatings are often applied to the absorber plates to improve the overall collection efficiency. A thermal fluid… Read more

Sep 26, 2011 | Edvard

Solar collector

What is the Static Var Compensator (SVC)?

Static Var Compensator is “a shunt-connected static Var generator or absorber whose output is adjusted to exchange capacitive or inductive current so as to maintain or control specific parameters of… Read more

Sep 25, 2011 | Edvard

The Siemens Static Var Compensator in the Radsted high-voltage switchgear station

Diagnosing Transformer Winding Insulation (video)

This video tutorial shows the progression of power factor or dissipation factor over frequency. Furthermore, measuring transformer winding insulation, including the connection of measuring leads, is explained. Reasons why recording… Read more

Sep 25, 2011 | Edvard

Ionization (Corona Discharge) Tests

The ionization test is used primarily for detecting ionization (corona discharge) and slot discharge in generator windings. Both ionization and slot discharge may cause deterioration of insulation. Ionization generally occurs… Read more

Sep 24, 2011 | Edvard

End winding of generator - Partial discharge

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 | Edvard

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 | Bipul Raman

Underground XLPE cables left to right: 345 kV, 138 kV, 69 kV, and distribution

Virus-Powered Battery

Engineers at MIT (Massachusetts Institute of Technology) have figured out a way to deal with virus that is better than just killing them: they’re putting them to work. The researchers… Read more

Sep 16, 2011 | Bipul Raman

An array of microbattery electrodes

Ready for wind power? It’s time.

Galloping climate change and dwindling supplies of fossil fuels are driving ever-greater interest in renewable energy. As a result, wind energy is booming worldwide. Not since the heyday of the… Read more

Sep 15, 2011 | Edvard

Ready for wind power? It's time.

State Machine Design

Written by Ray Salemi State machines are a foundation of digital design. Eventually we all reach the point where we need to control our digital algorithm, and we almost always… Read more

Sep 14, 2011 | elaina

Simple traffic light state machine

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 | Edvard

GIS vs AIS - Substation Earthing


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