Archive for the ‘Electrical Safety’ Category

Transmission line operation: bushfire effects (career story)

November 10th, 2017 | Make a comment | Posted in Electrical Safety

electrical-engineer-testimonyHere’s your fellow electrical engineer K.’s contribution to this blog. For his first attempt, he wanted us to follow him a day in his life as an electrical engineer and this day was kind of special.

Indeed, for the first time, he saw the effect of bushfire and smoke on transmission lines’ faults/tripping. Read the whole story now!
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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.

image: cdc.gov

image: cdc.gov

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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.

maintain-private-overhead-power-lines

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.
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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: ndu.cl

Introduction

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.
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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

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