Archive for the ‘Electrical Safety’ Category

Electrical System Protection mechanisms

March 15th, 2018 | Make a comment | Posted in Electrical Safety

megaphone-yellowMany standards like IEC are assigned for 2 main reasons: Safety of personnel and safety of appliances. Therefore, many protection mechanisms have been developed through years to protect the electrical system from abnormal conditions and provide the needed degree of safety.

Let your fellow electrical engineer Yasser discuss about those mechanisms below. Send us articles just like him via email

Choosing electrical insulator for MV and LV distribution overhead-lines

March 12th, 2018 | Make a comment | Posted in Electrical Safety

This article about the electrical insulator has been written by one of the members of the EEC (Electrical Engineering Community), whose nickname is K.

If you want to send debates, articles, reviews or stories about your career or studies, do not hesitate to contact us via email.

Purpose of an electrical insulator

different LV insulators

different LV insulators


Deadly mistakes when working with switchgear

March 1st, 2018 | Make a comment | Posted in Electrical Safety

medium voltage switchgear mistakes

Open secondary circuit of a current transformer

It is well known that an open secondary circuit of a loaded current transformer would cause a very rapid and large increase in voltage on the secondary side that could lead to arc formation and possible explosion.

Domestic electrical wiring: protection schemes & standards

February 15th, 2018 | Make a comment | Posted in Electrical Safety
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K. is one of the newest members of the community and has been sending us articles for few weeks now. Today he chose to focus on domestic electrical wiring.

You can send us your writings too via email.


Electrical power is transferred from generating stations to consumers at different voltage levels. Electrical power can be considered just like gas or water and same rule applies to its distribution i.e. proper pipeline and associated valves/switches.

Electrical System Protection : how can we use relays?

February 1st, 2018 | 1 Comment | Posted in Electrical Safety

In this article your fellow electrical engineer Yasser is going to explore the different types of relay and the devices that relays protect…

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.

What is Relay?

First of all we need to define the relay. It’s the device that protects the electrical systems against abnormal conditions like over and under voltage, over load and short circuit to ensure the safety of equipment from damage and personnel from shocks.

Relay circuit

Figure.1 Relay circuit |


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