Electrical Installations: Old VS New

October 24th, 2016 | Make a comment | Posted in Power quality
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Last time, your fellow electrical engineer Pablo told you about his bad experiences concerning grounding. Now he wants to deal with the electrical installations topic and he got 3 questions for you at the end of the article!

There are many differences that I can mention I found among old residential electrical installations (50 years ago) and today’s installation. The energy needs have changed. The main point is the demand, although it is true that today families have greater economic capacity to acquire more electrical equipment is so quite true that the equipment efficiency has improved considerably.

In the following figures can be seen as the average energy consumption has decreased slightly in recent years:

average-household-lighting-electricity-use average-household-gas-electricity-use
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Causes of faults in electric motors and their effects

October 21st, 2016 | Make a comment | Posted in Energy Efficiency - motors
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Toay, A.N. tells us about AC motors/electric motors and the causes of faults. If like him you want to discuss a topic that you like, send us a mail and we will publish it after a short review!

Failure in electric motors may occur at start-up or during operation. Most of the electric motor failures occur at start up due factors such as low insulation resistance, over-current or mechanical failures. Other causes include issues with the supply, operation environment or lack of maintenance.

Most of the motors, regardless of type and rating have a long service life and only require a minimum maintenance to ensure they do not malfunction. It is recommended to regularly maintain the motors and associated equipment, and to check for signs of aging of the insulation or other parts that may degrade the motor.

Main parts of an electric motor

Main parts of an electric motor | image: je-bearing.com

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Ground rod: bad experiences

October 17th, 2016 | Make a comment | Posted in Electrical distribution
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megaphone-redThis week, a fellow electrical engineer previously working in the industry (but since a couple of months more dedicated to academics/teaching) sent us an article.

His name is Pablo, and he wants to tell you his bad experiences concerning grounding.

Share your experiences too, send us a mail!

“Throughout my experience in housing construction as well as in the installation of raceways in existing buildings I have met with incorrect definitions concerning grounding with ground rods.

Among the myths that I have heard from technicians and customers I can mention:
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Electric load forecasting: advantages and challenges

October 13th, 2016 | Make a comment | Posted in Electrical distribution
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Hello everybody, I am Steven Mill and at times I publish articles on the blog to feed this great community! Today, let me tell you about electric load forecasting…

Load forecasting is the predicting of electrical power required to meet the short term, medium term or long term demand. The forecasting helps the utility companies in their operation and management of the supply to their customers.

Electrical load forecasting is an important process that can increase the efficiency and revenues for the electrical generating and distribution companies. It helps them to plan on their capacity and operations in order to reliably supply all consumers with the required energy.

electrical power demand

Factors that affect electrical power demand | image: energycentral.com

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Who Wrote Thevenin’s Theorem? I didn’t, sir!

October 10th, 2016 | Make a comment | Posted in Others
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senior-electrical-engineeerIn an article published on March, our dear senior engineer Muhammad (20 years experience) amazed us with an article about the Thevenin’s Theorem. Indeed, he drew a great parallel with human beings and it was brillant!

Today he is back with another funny essay on this theorem. We don’t tell you more, just read and appreciate it:
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