Quality Tests Performed on Insulated Oils

January 8th, 2019 | Make a comment | Posted in Power quality

Hi there! We have discussed in a previous article the theory behind the electrical breakdown in liquids applied to insulated oils inside power transformers.

We found that contaminants inside the oil are the main cause for electrical breakdown inside oils, therefore since mineral oils degrade over time, it is expected to eventually see contaminants inside the oil.

In order to ensure that the quality of the oil remains within acceptable values, it is necessary to develop quality tests to determine if it is necessary to schedule maintenance or not.

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Shielding of MV transmission lines and substations from lightening strokes (part 2)

January 4th, 2019 | Make a comment | Posted in Electrical Safety

In this article, we will try to discuss the outlook of lightning protection inside the premises of an electrical substation… Enjoy and please comment below!

Lightning protection Introduction in context to part one

Lightning strikes are a natural phenomenon and high power surges regularly hit the vulnerable parts of earth’s crust. Electrical installations including the transmission lines and sub stations are quite vulnerable for lightning to strike due to the following reasons;

A substation gantry under lightning attack

A substation gantry under lightning attack

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The Theory behind Dielectric Breakdown in Liquids

December 25th, 2018 | Make a comment | Posted in Power quality

Power transformers may have several types of insulation media. Some can be insulated with gases like air or SF6, others with solids like insulation paper, and some can be insulated with oil.

In this article, we will approach the theory behind the dielectric breakdown in liquids that allows us to understand the reason behind electrical discharges inside oil transformers. Let’s begin.
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Challenge puzzle for electrical engineers

December 20th, 2018 | Make a comment | Posted in Others

Hello, Colleagues!

This is Electrical Engineer Muhammad A. and I got a little game for you.

Bored with routine office work? Managing power shut-downs? Purchasing new equipment? Solving labor problems? Meeting equipment commissioning schedules. Here is some refreshing diversion for you.
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Shielding of MV transmission lines and substations from lightening strokes

December 17th, 2018 | Make a comment | Posted in Electrical Safety

Lightning strokes are nature’s crude way of disposing-off excess frictional energy dissipation among clouds. Arcs ranging up to thousands of volts break the insulation of air and strike the highest and vulnerable points on ground.

A transmission tower under lightning attack

A transmission tower under lightning attack

If not controlled and provided an alternative path, these surges can destroy almost any structure that comes between their paths to the ground. Read this article by Kam, an electrical engineer who sent us this essay by email.

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