Power Substation
Typical noise levels in power substation
Equipment noise levels may be obtained from manufacturers, equipment tendering documents, or test results. The noise level of a substation power transformer is a function of the MVA and BIL rating of the high voltage winding. These transformers typically generate… Read more
Jul 05, 2012 | By Edvard Csanyi
Energy and Power
Too bad Tesla didn’t finish it before he died – Wireless Power Transmission (WPT)
The wireless power transmission (WPT) refers to the efficient transmission of electric power from one point to without use of wire or any other substance. This technology can be used where conventional wires are unaffordable, inconvenient, expensive, hazardous, unwanted or… Read more
Jul 04, 2012 | By Bipul Raman
Electrical Lectures
Voltage vs. Current in a Resistor, Capacitor or Inductor
Elements in an electrical system behave differently if they are exposed to direct current as compared to alternating current. For ease of explanation, the devices have often been compared to similar every day items. Resistors in electrical systems are similar… Read more
Jul 03, 2012 | By Edvard Csanyi
Energy and Power
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 windings is common to both primary and secondary is called… Read more
Jul 02, 2012 | By Jignesh Parmar
Low Voltage
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, multimetering equipment, ground fault circuit interrupters. Most of the… Read more
Jun 30, 2012 | By Edvard Csanyi
Low Voltage
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 the installation or maybe installed remotely are: The batteries… Read more
Jun 29, 2012 | By Edvard Csanyi
Low Voltage
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 place where electric energy is utilized or electric power is… Read more
Jun 28, 2012 | By Edvard Csanyi
Transformers
Meggering (insulation resistance testing) of dry-type power transformer
The insulation resistance test (meggering) is of value for future comparison and also for determining if the transformer is to be subjected to the applied voltage test.The winding insulation resistance test is a DC high voltage test used to determine… Read more
Jun 27, 2012 | By Edvard Csanyi
Energy and Power
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 can select the optimum solution considering cost, reliability,… Read more
Jun 26, 2012 | By Edvard Csanyi
Energy and Power
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 Phase sequence meter Communication software (if required) Before… Read more
Jun 25, 2012 | By Edvard Csanyi
Electrical Lectures
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 armature winding. This condition, known as field orientation,… Read more
Jun 23, 2012 | By Edvard Csanyi
Transformers
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 are generated in the impedance of the network… Read more
Jun 22, 2012 | By Edvard Csanyi
High Voltage
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 controllers can be shunt or series connected… Read more
Jun 21, 2012 | By Edvard Csanyi
Energy and Power
Circuit breakers classified by interrupting medium
A circuit breaker is defined as “a mechanical switching device capable of making, carrying and breaking currents under normal circuit conditions and also making, carrying and breaking for a specified time, and breaking currents under specified abnormal circuit conditions such… Read more
Jun 20, 2012 | By Edvard Csanyi
High Voltage
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 real power, but some flows to supply reactive power. Reactive… Read more
Jun 19, 2012 | By Edvard Csanyi
