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Technical Articles

Energy and Power

Purposes and Examples of Safety Interlocking Devices

Most switchboards and motor control centres are fitted with a variety of electrical and mechanical safety interlocking devices. Their purposes are to protect against for example: Withdrawing the switching device while… Read more

Feb 05, 2014 | By Edvard

Purposes and Examples of Safety Interlocking Devices
Energy and Power

Conceptual Model of Smart Grid Framework by IEC

From a communication point of view, each system plays the role of either supplier or consumer of information, or more typically both. In addition to this intersystem communication, these systems… Read more

Feb 03, 2014 | By Edvard

Conceptual model of smart grid framework
Energy and Power

MV Circuit Breaker Or Vacuum Contactor? (2)

Continued from first part: MV Circuit Breaker Or Vacuum Contactor? (Part 1) When applied properly, both medium-voltage circuit breakers and medium-voltage fused contactors should provide decades of reliable service. Applied incorrectly,… Read more

Jan 31, 2014 | By Mohan Krishnasamy

MV Circuit Breaker Or Vacuum Contactor? PART 2 (on photo: SIEMENS's Sion vacuum circuit-breaker is designed for use in all common types of medium-voltage switchgear)
Energy and Power

MV Circuit Breaker Or Vacuum Contactor? (1)

To compare the application of medium-voltage circuit breakers and of fused contactors, we must understand the basic characteristics of each switching technology. Comparison presented here shows the major characteristics of… Read more

Jan 29, 2014 | By Mohan Krishnasamy

Application considerations - Circuit breaker Vs Vacuum contactor (1)
Power Substation

6 Simple Rules to Ensure Substation Safety

Another extremely important substation engineering aspect is associated with safety protection. It is fair to say that safety is always a No. 1 priority in substation design, operation and maintenance…. Read more

Jan 27, 2014 | By Edvard

6 Simple Rules to Ensure Substation Safety
Energy and Power

Dimensioning of Power Distribution Systems (2)

Continued from the first part: Dimensioning of Power Distribution Systems (1) Dimensioning of cable routes and devices follows the maximum load currents to be expected at this distribution level. As… Read more

Jan 24, 2014 | By Edvard

Dimensioning of Power Distribution Systems (2)
Energy and Power

Dimensioning of Power Distribution Systems (1)

When the basic supply concept for the electricity supply system has been established, it is necessary to dimension the electrical power system. Dimensioning means the sizing rating of all equipment… Read more

Jan 20, 2014 | By Edvard

Dimensioning of Power Distribution Systems (1)
High Voltage

8 main disadvantages of HVDC transmission

Few weeks back I posted an article about advantages of HVDC over HVAC transmission systems. Advantages of HVDC are numerous and very well recognized, but like everything on this earth… Read more

Jan 10, 2014 | By Edvard

8 Main Disadvantages of HVDC Transmission
Energy and Power

U.S. Renewable Energy – The Facts!

About 82% of the nation’s energy comes from fossil fuels, 8% from nuclear, and 9% from renewable sources. Wind is the fastest growing renewable source, but contributes only 1% of… Read more

Jan 08, 2014 | By Edvard

U.S. Renewable Energy - The Facts!


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