Energy and Power
Electrically Held Contactors – Siemens
Most lighting and heating applications require a contactor to control the loads. One type of contactor is an electrically held contactor, which is similar to a magnetic starter. Unlike a magnetic starter, however, a lighting and heating contactor is designed… Read more
Feb 05, 2011 | By Edvard Csanyi
Low Voltage
Form of separation 2 – Requirements
Form 2 defines overall assemblies which are enclosed to provide protection against contact with any internal live parts or components, and where there is internal separation of the busbars from functional units. The following general conditions apply; Busbars are separated… Read more
Feb 04, 2011 | By Edvard Csanyi
Cables
Electrical Wire – How It’s Made
Wikipedia: Electrical wiring in general refers to insulated conductors used to carry electricity, and associated devices. This article describes general aspects of electrical wiring as used to provide power in buildings and structures, commonly referred to as building wiring. Cant… Read more
Feb 03, 2011 | By Edvard Csanyi
Energy and Power
The Advantages Of Maintaining A High Power Factor
A high power factor eliminates penalty dollars imposed when operating with a low power factor. For many years, most utilities demanded a minimum of 85% power factor as an average for each monthly billing. Now many of these same utilities… Read more
Feb 03, 2011 | By Edvard Csanyi
Electric Motor
Operating Principle Of Three Phase Asynchronous Motors
The operating principle of an asynchronous motor involves creating an induced current in a conductor when the latter cuts off the lines of force in a magnetic field, hence the name “induction motor”. The combined action of the induced current… Read more
Feb 02, 2011 | By Edvard Csanyi
Low Voltage
The Switchboard Design Requirements
The following rules of design have to be implement in the aim to facilitate the assembly and especially the maintenance of the installation. The switchboard must be designed the way to have a clearly visible separation between the 3 following… Read more
Feb 01, 2011 | By Edvard Csanyi
Transformers
How To Connect Current Transformers?
The primary of a current transformer typically has only one turn. This is not really a turn or wrap around the core but just a conductor or bus going through the “window.” The primary never has more than a very… Read more
Jan 29, 2011 | By Edvard Csanyi
Energy and Power
How To Reduce Energy Cost?
The main motivation for decision makers to take an interest in energy control solutions is economic efficiency. When deciding whether to invest in improvement work, the manager of a building, for example, must be convinced that the operation will produce… Read more
Jan 28, 2011 | By Edvard Csanyi
Low Voltage
Form of separation 1 – Requirements
In general, the price of an Assembly will increase with increased levels of separation and/or types of construction. Choosing the arrangement with the most internal barriers will not always lead to the most appropriate solution. Where specific requirements are not… Read more
Jan 27, 2011 | By Edvard Csanyi
Energy and Power
Grounded Systems
Grounded systems are equipped with a grounded conductor that is required per NEC Section 250- 23(b) to be run to each service disconnecting means. The grounded conductor can be used as a current-carrying conductor to accommodate all neutral related loads…. Read more
Jan 26, 2011 | By Edvard Csanyi
Transformers
Price Of A Transformer
Today the production of transformers is characterised by a large variety of designs, manufactured in relatively short batches to meet the demands of a variety of customers with ever-changing expectations. Of course, fluctuations in commodity prices have a significant effect…. Read more
Jan 26, 2011 | By Edvard Csanyi
Electronics
Ethernet History
Ethernet is the most popular and widely deployed network technology in the world. In 1973, while working on a way to link the Xerox “Alto” computer to a printer, Bob Metcalfe designed and tested the first Ethernet network. This first… Read more
Jan 25, 2011 | By Edvard Csanyi
Geothermal Energy
Geothermal Energy – The Hot Facts
The word “geothermal” comes from the Greek words geo (earth) and thermal (heat). It means the heat of earth. The energy potential beneath our feet, in the form of geothermal energy, is vast. This tremendous resource amounts to 50,000 times… Read more
Jan 24, 2011 | By Edvard Csanyi
Energy and Power
Ecodial 3 – FAQ’s
Remark : You may renumber the functional names with the Automatic numbering of the View menu. Version 3.2 of Ecodial works from a cable database. If such a cable exists in the database, then you can use it. The short… Read more
Jan 22, 2011 | By Edvard Csanyi
Wind Power
How Do I Choose the Best Site for My Wind Turbine?
You can have varied wind resources within the same property. In addition to measuring or finding out about the annual wind speeds, you need to know about the prevailing directions of the wind at your site. If you live in… Read more
Jan 21, 2011 | By Edvard Csanyi
