Archive for the ‘Electrical Safety’ Category

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.

Why a Preventive Maintenance Plan of CBs is a good idea

March 3rd, 2017 | 1 Comment | Posted in Electrical Safety

Here’s an article by B.Q., one of the members of the Electrical Engineering Community. He kindly sent us this essay last week and we thought it would be nice to share it with you all! Want to be published too? Reach us by mail

By definition, “a circuit breaker is a protective device that operates automatically”. Certain fault conditions can actuate a circuit breaker resulting in a discontinuation of power supply to the relevant circuit or device.

circuit breaker failure consequences


Power Outage: safety before, during and after

July 19th, 2016 | 1 Comment | Posted in Electrical Safety
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Hi my fellows electrical engineers, it’s Steven Mill and today I want to deal with safety basics. So here is an article about Safety before, during and after power outage. Let me know what you think about it!

The electric power supplied to homes, factories, public places and other installations have the potential to harm the users. Even the domestic installation, which is one of the smallest, has enough current to cause death by electrocution. Other than the direct harm resulting from touching the live conductors, there are other indirect dangers such as fire hazards or accidents by moving electromechanical parts.

Electrical safety signs

Electrical safety signs | image : mfgtrade


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