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Monthly Archive for: «January, 2014»

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, either can… Read more

Jan 31, 2014 | Energy and Power

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)

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 medium-voltage circuit… Read more

Jan 29, 2014 | Energy and Power

Application considerations - Circuit breaker Vs Vacuum contactor (1)

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. Unlike the… Read more

Jan 27, 2014 | Power Substation

6 Simple Rules to Ensure Substation Safety

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 a rule:… Read more

Jan 24, 2014 | Energy and Power

Dimensioning of Power Distribution Systems (2)

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 and components… Read more

Jan 20, 2014 | Energy and Power

Dimensioning of Power Distribution Systems (1)

Power Transformer Turns Ratio Test

The turns ratio test is an AC low voltage test which determines the ratio of the high voltage winding to all other windings at no-load. The turns ratio test is performed on… Read more

Jan 17, 2014 | Testing and Commissioning

Power Transformer Turns Ratio Test

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 this system… Read more

Jan 10, 2014 | High Voltage

8 Main Disadvantages of HVDC Transmission
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