If the message below does not display correctly, you can view it in your browser at the following address:

Electrical Equipment failures

It is always very interesting to analyse and understand the causes behind electrical system failures so that you can improve your installations as an electrical engineer.

That is why we chose to focus on 3 articles about them this month...

Here are 3 experiences is the worst?

1. 10 reasons of equipment failure and overvoltage

2. 10 causes for power system failures

3. 10 surprising causes for power system failures

If you would like to publish an article in the blog just tell us by mail. You can even post directly on the forum!

You can write about whatever you want (debate, tutorial, product review, your observations, your opinion as an engineer or student, etc.).

Thanks in advance for your active contribution to our community,

The moderator team.


This month let us introduce you one of our community members: Smorkos

  • Head of Department at Debbas Industries since June 1997.
  • From Beirut (Lebanon).
  • Particularly interested in low voltage panel-boards & motor control centers and all other subjects in Electrical design.
  • Thinks the electrical engineering community very interesting, and he finds sometimes useful information.
  • Visits the Electrical Engineering blog and forum each time he receives a new e-mail from the community.
  • Likes to participate in the forum discussions because they're sometimes about business he is interested in it.

  • If you want your profile to appear in the next newsletter, tell us by mail

    Current and auto transformers (working principle)

    As we know transformers are device for converting one AC voltage to the another AC voltage with same frequency. One transformer is made of core, primary windings and secondary windings.

    In general there are 2 main classes voltage and power transformers. Let's have a closer look into it.

    What do you think about this topic and its link to aircraft?

    Sympathetic tripping in electrical power systems

    Several industries and utilities have experienced circuit breakers tripping due to undesirable relay operations, producing blackouts and a decrease in their expected incomes. This situation has raised a lot of concern.

    Some results have led to conclude that the real cause is a phenomenum called sympathetic tripping, following inrush currents, unbalanced or high load conditions.

    Let's discuss the sympathetic tripping phenomenun produced during the energization of parallel transformer and out-of-section faults in distribution systems.

    What's your opinion on this article? Tell us if it helped.

    Electrical System Protection : how can we use relays?

    We used to consider circuit breakers as the devices that protect the electrical systems, however circuit breakers are only the muscles they just isolate and protect when they get the orders.

    Relays are the brains, the devices that sense the faults and compare the value to the predefined values, and send the signals to breakers to take the actions.

    Do you have other tips to protect eletrical systems? How do you use relays to do so?


    © 2009 - Engineering.electrical-equipment.org

    Electrical engineering Blog meeting the recommendations for automated processing implemented in the context of e-mails by the Commission Nationale de l'Informatique et des Libertés (CNIL) of Act 78-17 of 6 January 1978 on computers, files and freedoms. We especially invite you to read the specifics of the CNIL corresponding to the use of emails professionals have enabled us to send you this letter so totally legal. The information contained in this email or capitalized by the tracking system used in this shipment will not be sold to third parties without your permission. In addition, you maintain access to your information. You can at any time terminate your subscription.