Posts Tagged ‘Power quality’

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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I am very upset!!

August 24th, 2015 | 9 Comments | Posted in Panel Building
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upset

I am very upset!!

My name is Paolo, I am a Brazilian panel builder. I assemble low voltage power distribution panels using enclosure systems from International manufacturers also known as “functional” panels… and I’m tired of it! I can only state that the expectations are not met…

International manufacturers (ABB, Schneider, WEG…) promote “functional” or “modular” systems (for beginners sold in the form of kit, just like Ikea furniture!). The other solution is to use standard metal-sheet enclosures that many panel builders manufacture themselves.

I first thought that the kit system allowed me to save time with the assembling… However, there are a lot of drawbacks that make me question the relevance of this kind of “kit” offer…
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Lighting systems for substations and plants (LV and MV)

August 17th, 2015 | 3 Comments | Posted in Power quality
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Marvin M. sent us a nice article this week, so we tought we should share it with you. If you too want to be published on the blog, just send us a mail :) we’d be glad to discuss about it with you.

But for now, enjoy this article!

“I am sure nobody would want to grope around energized equipment, rotating shafts, variable drives, and power tools in the dark or dim light. Illumination is vital for all industries. The risk is injury and death. For this reason, it is important to install proper lighting systems in all sections.

Experts suggest that 75% of the lighting should be primary while the remaining for emergency lighting systems accounts for 25%. The following highlights the standards, emergencies lighting, monitoring, and control as well as recommended locations.”

Lighting systems for substations and plants

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Electrical Transformer Specialist – Public utility company (Career story)

July 23rd, 2015 | 1 Comment | Posted in Others
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Electrical Transformer Specialist 1
Last week, we received this testimony which is rather a career story of one of our members. If some of you are interested in this type of career, just read his path below.

You can also send us your own career story in order to help young sudents who are many to read this blog! Just send your article by mail and we will publish it!

“Being Principal Analyst, my job with a public utility company entails electricity and gas transmission and distribution.

It is not as complex as it sounds but the work does tag along its fair share of challenges and requirements…”
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Power Quality Disturbances – Measuring the 7 most typical indices

April 2nd, 2015 | Make a comment | Posted in Power quality
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journal1

We received this article in our boxmail. It’s from a guest of the blog who wanted to contribute to the Electrical Engineering Community.

He chose to focus on Power Quality, and wrote a kind of “top 7” of the indices that play a role in measuring and quatifying disturbances.

Let’s check his writing:

Power quality disturbances can be categorized by various factors and methods. But, there a few indices that play a vital role in measuring the actual magnitude of the power quality disturbances.

Below mentioned are the seven most typical indices that play a major role in quantifying power quality disturbances:

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