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
High Voltage
Transients – Line Disturbances
Lightning strikes and switching transients on power lines will propagate down the line and eventually arrive at a substation. There, the voltage will be clamped by lightning arresters to a level the substation equipment can handle without damage. This voltage… Read more
Jan 21, 2011 | By Edvard Csanyi
Wind Power
Can I Connect Wind Turbine to the Utility Grid?
Small wind energy systems can be connected to the electricity distribution system and are called gridconnected systems. A grid-connected wind turbine can reduce your consumption of utility-supplied electricity for lighting, appliances, and electric heat. If the turbine cannot deliver the… Read more
Jan 20, 2011 | By Edvard Csanyi
Power Substation
Substation Ventilation Requirements – Ergon
Substations require special attention to ventilation in order to dissipate heat losses from electrical equipment. Wherever possible, natural air flow to the outside of the building will be used. Forced ventilation should be used where natural ventilation is not practicable…. Read more
Jan 19, 2011 | By Edvard Csanyi
Wind Power
Is There Enough Wind on My Site?
Does the wind blow hard and consistently enough at my site to make a small wind turbine system economically worthwhile? That is a key question and not always easily answered. The wind resource can vary significantly over an area of… Read more
Jan 19, 2011 | By Edvard Csanyi
Wind Power
What Do Wind Systems Cost?
A small turbine can cost anywhere from $3,000 to $35,000 installed, depending on size, application, and service agreements with the manufacturer. (The American Wind Energy Association [AWEA] says a typical home wind system costs approximately $32,000 (10 kW); a comparable… Read more
Jan 18, 2011 | By Edvard Csanyi
Transformers
What Are Partial Discharges On Cast Resin Transformers?
Partial discharges are electrical discharges occuring in insulating materials. The electrical discharge’s path only spans part of the insulating distance separating the conductors. The problem of partial discharges, whilst not existing in Low Voltage, is found in High and Very… Read more
Jan 17, 2011 | By Edvard Csanyi
