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Technical Articles

Autotransformer Connection Explained

An ordinary transformer consists of two windings called primary winding and secondary winding. These two windings are magnetically coupled and electrically isolated. But the transformer in which a part of… Read more

Jul 02, 2012 | Energy and Power

High efficiency autotransformer with 6%, 4%, 2% tap settings

Assemblies of switchgear and control panels (3)

Continued from 2nd part of article: Assemblies of switchgear and control panels (part 2) Now coverage of distribution panels and switchboards will be presented including molded case circuit breakers (MCCB), safety… Read more

Jun 30, 2012 | Low Voltage

Assemblies of switchgear and control panels (3)

Assemblies of switchgear and control panels (2)

Continued from 1st part of article: Assemblies of switchgear and control panels (part 1) Other components that are needed for the proper operation of the switchgear or control panel but not necessarily… Read more

Jun 29, 2012 | Low Voltage

Assemblies of switchgear and control panels (2)

Assemblies of switchgear and control panels

Switchgear and control panels are found in power generating stations, transformer stations, distribution substations, commercial and institutional buildings, industrial plants and factories, refineries, paper mills, metal smelters and any other… Read more

Jun 28, 2012 | Low Voltage

Assemblies of switchgear and control panels

Substation Switching Schemes

This technical article is intended to provide description and comparison of single line options for a DESN substation. The goal is to provide an analytical comparison for all options so… Read more

Jun 26, 2012 | Energy and Power

Switching Scheme Of Substation

Commissioning of Electrical Equipment

To verify system condition after has been energized with rated system (service) voltage for which it is designed. Also to ensure the protection, metering system for correct directionality. Multimeter Phase… Read more

Jun 25, 2012 | Energy and Power

Commissioning of Electrical Equipment (on photo OKKEN Low Voltage Switchgear - Schneider Electric)

DC Motor Drive Explained In Few Words

In a DC motor, the magnetic field is created by the current through the field winding in the stator. This field is always at right angles to the field created… Read more

Jun 23, 2012 | Electrical Lectures

Figure 1 - Control loop of a DC Motor Drive

Transformer Extra Losses Due To Harmonics

Non-linear loads, such as power electronic devices, such as variable speed drives on motor systems, computers, UPS systems, TV sets and compact fluorescent lamps, cause harmonic currents on the network…. Read more

Jun 22, 2012 | Transformers

Transformer Extra Losses Due To Harmonics

FACTS – Flexible AC Transmission Systems

The acronym FACTS stands for “flexible AC transmission systems.”These systems add some of the virtues of DC, i.e., phase independence and fast controllability, to AC transmission by means of electronic… Read more

Jun 21, 2012 | High Voltage

FACTS - Flexible AC Transmission Systems (SIEMENS)

Reducing Distribution Line Losses

One of the main benefits of applying capacitors is that they can reduce distribution line losses. Losses come from current through the resistance of conductors. Some of that current transmits… Read more

Jun 19, 2012 | High Voltage

Reducing Distribution Line Losses

Sag and tension of transmission and distribution lines

The energized conductors of transmission and distribution lines must be placed to totally eliminate the possibility of injury to people. Overhead conductors, however, elongate with time, temperature, and tension, thereby… Read more

Jun 17, 2012 | Transmission and Distribution

Sag and tension of transmission and distribution lines

Soft Starter In Industrial Applications

An induction motor connected directly to the power supply draws a constant magnetizing current at full speed, no matter what the load is. At anything less than full load, power… Read more

Jun 16, 2012 | Electric Motor

Danfoss VLT® Soft Starter

ZigZag Transformer Connection Overview

The zigzag connection of tranformer is also called the interconnected star connection.  This connection has some of the features of the Y and the ∆ connections, combining the advantages of… Read more

Jun 15, 2012 | Transformers

Zigzag Grounding Transformer


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