Step Up and Step Down Transformers

August 21st, 2014 | Make a comment | Posted in Electrical distribution
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One of our fellow member of the EEC sent us this article few days ago. Remember you can do the same and talk about whatever you want, even yourself!

What is a transformer?

Transformers are devices that change (transform) the voltage of power supplied to meet the individuals needs of power consumers. It uses the principle of electromagnetic induction to change the voltage (alternating difference) from one value to another whether smaller or greater.

A transformer is made of a soft iron coil with two other coils wound around it, but not connected with one another. The iron coils can either be arranged on top of another or be wound on separate limps of the iron core.

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Ground and test devices for engineers and technicians

August 18th, 2014 | Make a comment | Posted in Electrical distribution
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Marvin M. from the community had the great idea to give advices regarding grounding and test devices. Enjoy and don’t forget to post your own advices if you have few.

Introduction

A ground and test device primarily applies personal protective grounds to the MV components and conductors in the assemblies. It is a primary necessity as it creates a safe working condition for the engineers and technicians.

In essence, it offers prime protection for the personnel, equipment and facilities. According to the set standards, achieving a prime electrically safe environment encompasses the following:

  • Identify all energy sources in the working environment
  • Isolate the sources
  • Verify electrical source isolation
  • Lockout the devices to the sources
  • Test for voltage absence using the appropriate test device
  • Apply temporary personal protective grounds

The above steps must be fulfilled before the actual grounding. Do note that negligence of any of the steps leads to disruption of the production process and injury to personnel. Luckily, for engineers and technicians, various standards have been set up governing ground and test devices.

Ground and test devices for engineers and technicians

Fig.1 Ground and test device working principle

The standard divides the test devices into two categories:

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Miniaturization of electrical machines

August 14th, 2014 | Make a comment | Posted in Others
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Hi everybody, today I want to tell you about the miniaturization of electrical machines, a growing phenomenon. Hope you’ll like it.

Introduction

Being a 21st century homo sapiens, we may deny the significance of oxygen while suffocating but we can never deny the utility of science in life. The word has penetrated deep into our blood. No matter what we are suffering the resolution is “Science”.

Whatever is the issue, if you can’t make proper round chapatti ask science to do it for you through bread maker, or if you don’t want your hands to be abrasive while evacuating the oil spots from used dishes turn to science and get yourself relished with the dishwasher. Science can’t be restricted to mere kitchen but to every part of our daily life.

You are concerned about your growing tummy but still you feel lethargic enough to visit any park, get yourself acquainted with a scientific creature named “treadmill” or when one morning you’re given 7 minutes to reach your office against your suspension, seek help from Lamborghini Aventador whose 690 Nm (507 lbft) @ 5,500 RPM Displacement can only be your savior there.

Miniaturization of electrical machines 1
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Simulation Diagrams of Laplace Transform

August 11th, 2014 | 1 Comment | Posted in Others
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Next part of Nasir’s tutorial on laplace transform…

Introduction

Since we have established the fact that we can get the algebraic equations from differential and integral equation by using Laplace transform. To remove the undermined coefficients and variations of parameters, we use helpful Laplace transform and for the matter of fact this is most gainful for the input terms like periodic, pulsive or piecewise.

Having boundary conditions, 0 ≤ t < ∞, we consider a function f (t) and its Laplace integral will be:

Simulation Diagrams of Laplace Transform

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Residential Solar Power

August 8th, 2014 | Make a comment | Posted in Energy Efficiency - solar
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Andrei is very interested in integration of green technologies in residential areas. So we weren’t surprised to see his next article about solar power in residential applications. Enjoy!

Introduction

Solar Power Technology is mature enough to bring great benefits in many regions of the world. I’m sure by now we all know these benefits, smaller electricity bill, endless energy supply, green technology.

As an electrician you might have clients asking you about solar power so it’s best to known a bit about it and what is required for such an installation in order to provide a good answer.

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