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Technical Articles

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 Csanyi

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 Csanyi

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 Csanyi

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 Csanyi

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 Csanyi

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 Csanyi

Overvoltages Caused by Lightning
Energy and Power

Smart Grids and The New Age of Energy

Network planning Power electronics (HVDC/FACTS) Bulk renewable integration Energy Management System (EMS) Smart substation automation and protection Integrated Substation Condition Monitoring (ISCM) Communication Solutions Distribution Management System (DMS) Distribution automation… Read more

Apr 24, 2013 | By Emmanouil Angeladas

Smart Grids and The New Age of Energy
High Voltage

Conductor Types Used For Overhead Lines

The international standards covering most conductor types for overhead lines are IEC 61089 (which supersedes IEC 207, 208, 209 and 210) and EN 50182 and 50183 (see Table 1). For… Read more

Apr 20, 2013 | By Edvard Csanyi

Conductor Types Used For Overhead Lines
Energy and Power

Using AC switchgear in DC applications

Switchgear designed for alternating current can carry at least the same rated continuous operational DC current. With direct current the skin effect in the circuits disappears and none of the… Read more

Apr 19, 2013 | By Edvard Csanyi

Using AC switchgear in DC applications
Lighting

Visual Tasks of Typical Living Room Lighting

Most living rooms require flexible lighting design solutions because they serve a broad variety of changing functions. The lighting in a typical living room should comfortably serve small group conversation,… Read more

Apr 17, 2013 | By Edvard Csanyi

Visual Tasks of Typical Living Room Lighting


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