Basics Of Motor Starters And Contactors - Repost

Welcome to this EATON’s guide, which is about starters, devices that control the use of electrical power to equipment, usually a motor. As the name implies, starters “start” motors. They can also stop them, reverse them, accelerate them, and protect them. Starters are made from two building blocks, contactors and overload protection: Contactors control the electric current to the motor. Their function is to repeatedly...

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Transfer Switch Application and Selection Manual - Repost

This Manual is intended to provide guidance in the selection and application of transfer switch equipment in a variety of power generation situations. Transfer equipment is available in many configurations, all sharing the same basic function, that of providing a means to connect electrical loads to either of two independent power sources. Download:http://electrical-engineering-portal.com/download-center/books-and-guides/power-substations/tra...

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How Loud Is a Wind Turbine

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Electrical Installation Guide 2015 - FREE Download Now

Designer, Consultant, Contractor, Panel builder, Facility manager, Student, teacher, Standardisation or certification experts. we all have to know and comply to electrical installation standards and regulations, in order to ensure the safety (and more and more the energy efficiency) of our customers' electrical installations.  These international standards, set by the IEC, are complex and keep evolving; as a result, we struggled to stay informed. As an example, are you aware that the IEC 60364 "Low-voltage electrical installations" part...

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How does a Transformer work ?

I will be uploading from now on material that I find explain electrical principles in the easiest understanding way so my readers find it all in just one place. Hope you learn something once again. ...

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Buchholz Protection for Transformers

The Buchholz protection, protects the transformer again every abnormal phenomenon produce inside the tank. It bases in the fact that the irregularities in the transformer functioning cause heating in the winding and in consequence the production of gases from the oil, the quantity and speed of its production increases at the time the damage spreads.  The gases that are produce inside...

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Why AC Power Systems have 3 phases?

I am kind of in a wondering phase right know, it all began with the frequencies and then... this next question WHY 3 PHASES. May be more than one electricity enthusiast that haven't got deep in to it but now is wondering. It is mostly mathematics the explanation, by increasing the number of phases the amount of power that is transmitted gets to a point that it is just not efficient, it gets to complex and expensive. Lets hear this Senior Transmission Engineer for a moment,  he does why I like the most... get complex subjects explained in...

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Basic Principles Generators/Motors AC 2/2

Lets see now what this people have to say about AC machines. Once again, hope you learn something new. ...

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Basic Principles Generators/Motors DC 1/2

Taking it back once more, back when I was at the university starting to know the electrical machines I have to be honest I had nightmares trying to acknowledge all the laws of physics that rule the way machines worked. Today I just now thing, that the simpler the better so for those that just wanna know how it works and don't get to much over there heads here is a video that puts it just in simple words the way everyone likes it. Its an all video but I thing it is just great piece of work of explanation, Hope you enjoy it and learn one or...

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Motor Selection Guide

When it comes to a Selection of an Electrical Motor for a set application some times engineers find themselves in a bast range of options and got confuse on which are the best "technically" for that option. Once the engineers makes up their mind now they have to establish the rated characteristics to order the motor to the given manufacturer. Lets face it it is not that easy to remember all this parameters. A few years ago when I was a...

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The origin of electrical frequencies – Why 50 or 60 Hz

A couple months ago I decided to emigrate from my home country Venezuela, to the southern country Chile. As an electrical engineer while I was looking for a job I spend some of my free time on studying the local electrical system, the first factor that I have to get used to is that here the system works at 50 Hz and most of the equipment are specify according to the IEC Standard. For the last 8 years I had worked on 60 Hz systems and using mostly...

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