Arc Fault Circuit Interrupter (AFCI)

July 25th, 2016 | Make a comment | Posted in Electrical distribution
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arc-fault-circuit-interrupter-afciNew article from A.N, a very experienced member in industrial, commercial buildings and residential power installations, testing, control and maintenance.

Enjoy and do not hesitate to ask him questions!

An arc fault circuit interrupter (AFCI) is a special circuit breaker, outlet or receptacle with the ability to detect, recognize and respond to dangerous electrical arcs in a circuit.

The device provides a higher level of protection compared to the standard circuit breaker. Its main advantage is the ability to detect and remove the hazardous arcing before it can cause a fire.
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Reactive power compensation in long middle voltage power lines

July 22nd, 2016 | 1 Comment | Posted in Power quality
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megaphone-darkblueMile is a young member of the community and he often sends articles about several topics. But his particularity is that he shares the experiment he had in school as a young electrical engineer student in Romania.

You too can share your experiment and be published in the blog, just send a mail to the team!


The general purpose of this article is to compare several ways of compensation of reactive power in middle voltage power lines in order to determine the optimal technical and economical solution. In this article I am going to examine middle voltage power line which is fed from 110/20 kV/kV transformer station. Load flow analyses will be made for different cases and loads for the transformer station. According the results from the analyses the optimal technical solution will be determined.
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Power Outage: safety before, during and after

July 19th, 2016 | Make a 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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Industrial application of Synchronous motors

July 14th, 2016 | 1 Comment | Posted in Energy Efficiency - motors
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D.Ros is so crazy about motors that everytime we receive an article from him, we know what he’ll be about. Despite of this, his material is always very interesting and well explained.

For our pleasure, here’s the latest article from him. He chose to make an insight to typical start-up profiles… Let’s read!

Understanding the basics of how synchronous motors work will surely help you take good decisions upon whether or not to use this type of motor, if you rather get a brushless exciter or not, and choose the right start-up method suitable for your application and power system’s availability.

The next thing you should get to know is how a typical start-up looks like, what problems you might encounter and what are the possible solutions to them.

Normal reactor assisted start-up profile of synchronous motors

Figure 1: Normal reactor assisted start-up profile of a synchronous motor

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Reasons for Load Shedding

July 11th, 2016 | Make a comment | Posted in Electrical Safety
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Today we’re glad to show you this article by A.N, our fellow member of the community. You still can send us your essays by mail. Enjoy!

Load shedding in electrical supply networks is a controlled process in which the utility company drops off part of the load in order to balance the demand and the generated capacity. This is often done whenever there is excess load on the system. In standby generators, it involves disconnecting or shedding some circuits to prevent an overload condition.

turning off some loads

Figure 1: turning off some loads | image:

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