Archive for the ‘Electrical Safety’ Category

Lightning Protection

June 27th, 2017 | Make a comment | Posted in Electrical Safety
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Hi again, this is Jesús Pérez Díaz, as always it’s a pleasure to write in this blog. This article is about Lightning protection, enjoy and comment it.




7 steps to maintain private overhead power lines

June 8th, 2017 | 1 Comment | Posted in Electrical Safety

Patricia is a electrical engineering student who is always ready to share some tips for her fellows students. She kindly proposed to publish her essays here and if you want to do so as well, as usual you just need to send us a mail.


Private overhead electrical lines (POELs) are those which transport lines from the main switchboard and meters to a specific building or house. There are many schemes out there about private lines and all of them begin at the point of supply. The private poles and wires inside the property boundary of the homeowner are his one responsibility.

Ground Fault Protection

April 18th, 2017 | Make a comment | Posted in Electrical Safety
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What about a new article from our fellow electrical engineer Jesús Pérez Díaz? Today he tells you about Ground fault protection so if you’re interested in this topic, enjoy!

And if you have knowledge to share about it, write a comment or an article. You just need to send us a mail.

Circuit Breaker Ground fault relay

ABB Circuit Breaker & Ground fault relay | image:


Statistics have shown that electrical faults involving Ground are more likely to occur than any other one. A ground fault happens when any of the phase conductors (also known as: hot, live, and line) gets on contact to ground or any grounded part such as a grounded motor frame. It could take place because of a reduction of insulation, cable damage, overvoltage, an accident originated by people or incorrect wiring, and bad equipment operation.

Protection against voltage spikes in LV systems

April 13th, 2017 | Make a comment | Posted in Electrical Safety

As a warrior can’t fight without his shield an electrical system can’t withstand without a well-designed protection system. So protection is a must in any power system, and it’s applied at all voltage levels and for personnel or equipment protection and many other purposes. We can categorize protection according to the event leading a protection device to operate, such as overcurrent protection, earth fault protection, overvoltage protection and many other events.

Fig.1 Voltage spike effect on system voltage

Fig.1 Voltage spike effect on system voltage


How can fuses replace CBs in 3-phase systems? (back to basics)

March 9th, 2017 | 2 Comments | Posted in Electrical Safety


As only few milliamperes can kill a human in a part of second, safety always is the big concern for electrical engineers and protection systems designing gets much more attention.

This is the topic our fellow electrical engineer Yasser chose to discuss today. As a reminder, you too can be published in this blog, just send a mail to the team!

Protection and fuses

Usually the word protection in electrical engineers’ glossary is associated with Circuit Breakers (CBs) and Fuses. These devices are the muscles of protection systems which isolate and protect them from different kinds of faults and/or abnormal conditions.

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