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Technical Articles

Testing and Commissioning

Transformer Routine Dielectric (Insulation) Test

The following insulation tests are performed in order to meet the transformer insulation strength expectations. Unless otherwise requested by the customer, the following test are performed in the following order (IEC… Read more

May 23, 2013 | By Edvard

Transformer Routine Dielectric (Insulation) Test
Energy and Power

Are you concerned about your privacy in Smart Grid?

Modernization of the grid will increase the level of personal information detail available as well as the instances of collection, use and disclosure of personal information. Instead of measuring energy… Read more

May 22, 2013 | By Edvard

Are you concerned about your privacy in Smart Grid?
Testing and Commissioning

Erection Procedure for Power Transformer

This technical article deals with transformers and their installation so we restrict ourselves here to the procedures associated with their commissioning. Transformers should be inspected for internal or external damage, particularly if… Read more

May 20, 2013 | By Edvard

Erection Procedure for Power Transformer
Industrial Automation

Requirements and Functions of Substation Automation

Substation automation is the cutting edge technology in electrical engineering. It means having an intelligent, interactive power distribution network including : Increased performance and reliability of electrical protection. Advanced disturbance… Read more

May 17, 2013 | By Edvard

Requirements and Functions of Substation Automation
Energy and Power

Ferroresonance Occurrence In Power Transformer

Ferroresonance occurs when line capacitance resonates with the magnetizing reactance of a core while it goes in and out of saturation. Ferroresonance is usually associated with potential transformers, which are… Read more

May 10, 2013 | By Edvard

Ferroresonance Occurrence In Power Transformer
Testing and Commissioning

When a transformer has stomach pain and wants to…

During normal operation, transformer internal structures and windings are subjected to mechanical forces due to the magnetic forces. These forces are illustrated in Figure 1. By designing the internal structure very… Read more

May 08, 2013 | By Edvard

Transformer windings forces due to the magnetic forces
High Voltage

Erection procedure for HV switchgear (Part 2)

Continued from first part: Erection procedure for HV switchgear (Part 1) Positioning of the cubicles should start near to the centre of the switchboard, installing as early as possible the… Read more

May 01, 2013 | By Edvard

ABB Gas-insulated Switchgear ELK-04 Modular System up to 170 kV, 4000 A, 63 kA
High Voltage

Erection procedure for HV switchgear (Part 1)

Before commencing erection of HV switchgear check that all connections are tight on busbars and on main circuits as well as auxiliary circuits. Examine the insulation very carefully, because there… Read more

Apr 29, 2013 | By Edvard

Erection procedure for HV switchgear
Energy and Power

Why Lamp Flickers Sometimes

Voltage regulation has been one of the most important problems of the electric industry since its inception. The sizes of many parts of a power system are determined largely by this… Read more

Apr 27, 2013 | By Edvard

Why lamp flickers sometimes
Energy and Power

Overvoltages Caused by Lightning

Overvoltages of atmospheric origin arise from uncontrollable sources and their severity for the load depends on many parameters that are determined according to where the lightning strikes and the structure… Read more

Apr 26, 2013 | By Edvard

Overvoltages Caused by Lightning


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