myElectrical Home

UPS Battery Sizing

Various techniques exist to enable the correct selection of batteries for UPS applications. The procedure described below is one of the more common. It is also possible to use the IEEE 485 method (see link at the bottom of the page)....Read More..

By Steven McFadyen on Sunday, April 08, 2012

Photovoltaic (PV) - Electrical Calculations

Photovoltaic (PV) cells (sometimes called solar cells) convert solar energy into electrical energy. Every year more and more PV systems are installed. With this growing application, it's a good idea for every practicing professional to have an understanding of the calculations associated with PV cells....Read More..

By Steven McFadyen on Thursday, July 11, 2013

The ac resistance of conductors

In a previous article I looked at the dc resistance of conductors and in this article we turn our attention to ac resistance. If you have not read the previous article, now may be a good time to do so. The ac resistance of a conductor is always larger than the dc resistance. The primary reasons for this are 'skin effect......Read More..

By Steven McFadyen on Wednesday, January 11, 2012

Community Activity

Steven McFadyen voted for Motor starting phase reversal

This answer is useful

4 days ago

ram31 commented on Grounding Transformers above Ground Level

4 days ago

ram31 answered the question Grounding Transformers above Ground Level

4 days ago

ram31 commented on Current Carrying Capacity of Cables

4 days ago

LuCG answered the question Current Carrying Capacity of Cables

4 days ago

myElectrical Tools

We have tools to help. Our tools range from assisting with basic calculations to IET compliant cable sizing. Feel free to browse and try.

Units Conversion
Complex Number Calculator
3-Phase Calculations
IEE Cable Sizing
Circuit Protective Conductor
Power Factor Correction

even more tools...

Contribute

Notes

Notes is a collaborative collection of electrical engineering information and educational material. Why not consider adding your knowledge and help make a better Notes for everyone.

Have something interesting to share or some hidden knowledge why not add a post. Sharing your thoughts and ideas is a great way to pass on knowledge. Who knows you may even become famous along the way.

Learn More