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Monthly Archive for: «June, 2012»

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 switches, panelboards,… Read more

Jun 30, 2012 | Edvard

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 part of… Read more

Jun 29, 2012 | Edvard

Assemblies of switchgear and control panels (2)

Assemblies of switchgear and control panels (1)

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 place where… Read more

Jun 28, 2012 | Edvard

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 that one… Read more

Jun 26, 2012 | Edvard

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 angle meter… Read more

Jun 25, 2012 | Edvard

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 by the… Read more

Jun 23, 2012 | Edvard

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. Harmonic voltages… Read more

Jun 22, 2012 | Edvard

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 controllers. Such… Read more

Jun 21, 2012 | Edvard

FACTS - Flexible AC Transmission Systems (SIEMENS)
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