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Electrical Engineering - What? Why? How?

2020-05-01T16:32:00.000+05:30

Electrical Engineering - What? Why? How?

Now let's come to the primary question: What?

Electrical Engineering.

Electrical engineering could be a professional engineering discipline that generally deals with the study and application of electricity, electronics, and electromagnetism. This field first became a preferable field for occupation within the second half of the 19th century after commercialization of the telephone, electrical telegraph and commercial use of power distribution. Subsequently, broadcasting and recording media made electronics a part of way of life. The invention of the transistor, and later the microcircuit, brought down the value of electronics to the purpose they'll be employed in almost any household object.

Electrical engineers get a awfully big selection of industries and therefore the skills required are likewise variable. There is variety of responsibilities from basic circuit theory to the management skills required for a project in-charge. The tools and equipment that a engineer might have are similarly variable, starting from a straightforward voltmeter to a top end analyzer to classy design and manufacturing software.
Electricity is nothing but just flow of electrons. So we accustomed study every things which get effected with electricity (Electrons) directly or indirectly.
In little deep we will say that Electrical Engineering is the different idea of a way to utilize these electricity with various devices and various easy methods. Electricity affect every things either it's Solid, liquid or Gas form so its affect to each things and that we are simply finding this effect and application of this effect in engineering.

Now let's come to the second question: Why?

Electrical Engineering.

Electrical Engineering could be a fascinating field for anyone who is willing make some time at a challenging, enriching and rewarding experience even as the world needs its Doctors, Nurses and Teachers, Engineers are a few things which we simply couldn't do without. If you prefer the thought of making electrical systems which could help numerous people on each day to day basis, just like the systems employed in phones, or computers, then read these reasons to study electrical engineering.

ELECTRICAL ENGINEERING JOB OPPORTUNITIES:

After a degree in EE you'll be able to apply for: (Current scenario in India)

Apply for govt. moreover private jobs.
Get private jobs like havells, Larsen &Turbo, and other companies as all of them require engineers for maintenance.
Get to figure publicly owned PSUs like BHEL, NTPC, NHPC, ONGC, AAI, IOCL, HPCL, grid corporation, and state owned electricity boards and that they offer excellent salary and other facilities.
You may also do Masters degree (M.tech or M.E) in EE moreover as other fields if you wish your career in research or teaching.
You can appear for GATE (graduate aptitude test in engineering) which could be a gateway for all IITs, and PSUs.
Now-a-days gate score has become extremely important for engineering graduates because Gate score is additionally being taken by some reputed private organizations like Maruti Suzuki, TATA motors.
Apart from career in technical field, you're also eligible for taking other entrance exams like banking, UPSC civil services, SSC, police.
You are eligible for applying to Indian Army, Navy and Air force.
India’s premier research institutes like, BARC also take their own examination moreover Gate score for filling up their vacant electrical posts. Other organizations include DRDO, ISRO.
IES (Indian Engineering Services) is the best govt. job for an electrical engineer. it's conducted by UPSC.
Well Mtech from IIT also gives you an opportunity to move abroad.
MBA from IIMs is like dream come true if you want to own a career in management. Salary packages are humongous.
There are lots of opportunities for us. Few of them i've got listed here.

This shows that there are multiple career opportunities during this field & moreover EE is core engineering subject ,so you'll be able to get in the other trades of your interest also for higher studies.

ADVANTAGES OF ELECTRICITY :

Convenient Form. Electricity could be a very useful sort of energy. It is easily transformed into other sorts of energy. as an example, if we wish to convert electricity into heat, we must pass electrical current through a tungsten wire of high resistance, as an example, a heater. Similarly, electricity is converted into mechanical energy (e.g., electric motors), light (e.g., an electrical bulb) etc.Like this there are many application of electricity throughout the whole world. Few of those applications in Industrial areas are - Utilization, Traction, Heating, Illumination, Motors for driving mechanical loads, Fan , Blower, Electronic Equipment etc.

Easy Control. The electrically operated machines have simple and straightforward starting, control, and operation. as an example, an electrical motor is operated by turning on or off a switch. Similarly, with simple arrangements, the speed of electrical motors is easily varied over the required range.

Greater Flexibility. One important reason for preferring electricity is that the flexibility that it offers. It is easily transported from one place to a different with the assistance of conductors.

Cheapness. Electricity is far cheaper than other sorts of energy. Thus, it's overall economical to use this way of energy for domestic, commercial, and industrial purposes.

Cleanliness. Electricity isn't related to smoke, fumes, or poisonous gases. Therefore, its use ensures cleanliness and healthy conditions.

High-transmission efficiency. The consumers of electricity are generally situated quite aloof from the centers of its production. The electricity is transmitted conveniently and efficiently from the centers of generation to the consumers with the assistance of overhead conductors called transmission.

Now let's come to the final question: How?

Electrical Engineering

Step 1.Minimum qualification for being an electrical engineer, is Diploma in Electrical Engg.

( Minimim Duration = 3 Years after H.S )

Step 2. Earn a Bachelor's Degree in Electrical Engineering. ( Min. Duration = 4 Years after H.S or

3 Years after Diploma )

Step 3. Consider earning a Master's Degree. (Duration = 3 Years after B.Tech)

Step 4. Join a job as fresher & gain working experience.

Step 5. Advance to a Supervisory or manager level position.

ELECTRICAL ENGINEERING SALARY (AT INDUCTION LEVEL):

An Electrical Engineer can earn a maximum average of INR 30-50k per month in the technical field and in a private sector
An Electrical Engineer can earn a maximum average of INR 50-60k per month In the technical field, in a government job and in the PSUs.
As an electrical engineer if you are a graduate then you can apply for many private and public sector jobs of banks, managerial positions in private companies which can make you earn upto INR 60-70k per month.

All the above salary depends on quality & knowledge of the engineer that he/she had in engineering and the exposure of the educational institute from which he/she are graduating.

Equivalent Resistance Calculation - Star to Delta Conversion

2019-02-17T18:41:00.000+05:30

Star to Delta Conversion

In the previous article, we discussed about the conversion of delta network into an equivalent star network. Now, let us discuss about the conversion of star network into an equivalent delta network. This conversion is called as Star to Delta Conversion.

In the previous chapter, we got the resistances of star network from delta network as

R_{A} = \frac{R_{1} R_{2}}{R_{1} + R_{2} + R_{3}}

Equation 1

R_{B} = \frac{R_{2} R_{3}}{R_{1} + R_{2} + R_{3}}

Equation 2

R_{C} = \frac{R_{3} R_{1}}{R_{1} + R_{2} + R_{3}}

Equation 3

Delta Network Resistances in terms of Star Network Resistances

Let us manipulate the above equations in order to get the resistances of delta network in terms of resistances of star network.

Multiply each set of two equations and then add.

\Rightarrow R_{A} R_{B} + R_{B} R_{C} + R_{C} R_{A} = \frac{R_{1} R_{2} R_{3}}{R_{1} + R_{2} + R_{3}}

Equation 4

By dividing Equation 4 with Equation 2, we will get

By dividing Equation 4 with Equation 3, we will get

By dividing Equation 4 with Equation 1, we will get

By using the above relations, we can find the resistances of delta network from the resistances of star network. In this way, we can convert star network into delta network.

Example :

Let us calculate the resistances of delta network, which are equivalent to that of star network as shown in the following figure.

Given the resistances of star network as R_A = 6 Ω, R_B = 18 Ω and R_C = 3 Ω.

We know the following relations of the resistances of delta network in terms of resistances of star network.

Substitute the values of R_A, R_B and R_C in the above equations.

So, we got the resistances of delta network as R₁ = 10 Ω, R₂ = 60 Ω and R₃= 30 Ω, which are equivalent to the resistances of the given star network.

Equivalent Resistance Calculation - Delta to Star Conversion

2019-02-17T18:32:00.002+05:30

Delta to Star Conversion

In this chapter, let us discuss about the Delta to Star Conversion.

Delta Network

Consider the following delta network as shown in the following figure.

The following equations represent the equivalent resistance between two terminals of delta network, when the third terminal is kept open.

Star Network

The following figure shows the equivalent star network corresponding to the above delta network.

The following equations represent the equivalent resistance between two terminals of star network, when the third terminal is kept open.

Star Network Resistances in terms of Delta Network Resistances

We will get the following equations by equating the right-hand side terms of the above equations for which the left-hand side terms are same.

R_{A} + R_{B} = \frac{(R_{1} + R_{3}) R_{2}}{R_{1} + R_{2} + R_{3}}

Equation i

R_{B} + R_{C} = \frac{(R_{1} + R_{2}) R_{3}}{R_{1} + R_{2} + R_{3}}

Equation ii

R_{C} + R_{A} = \frac{(R_{2} + R_{3}) R_{1}}{R_{1} + R_{2} + R_{3}}

Equation iii

By adding the above three equations, we will get

\Rightarrow R_{A} + R_{B} + R_{C} = \frac{R_{1} R_{2} + R_{2} R_{3} + R_{3} R_{1}}{R_{1} + R_{2} + R_{3}}

Equation iv

Subtract Equation ii from Equation iv.

R_{A} + R_{B} + R_{C} - (R_{B} + R_{C}) = \frac{R_{1} R_{2} + R_{2} R_{3} + R_{3} R_{1}}{R_{1} + R_{2} + R_{3}} - \frac{(R_{1} + R_{2}) R_{3}}{R_{1} + R_{2} + R_{3}}

By subtracting Equation iii from Equation iv, we will get

By subtracting Equation 1 from Equation 4, we will get

By using the above relations, we can find the resistances of star network from the resistances of delta network. In this way, we can convert a delta network into a star network.

Example :

Let us calculate the resistances of star network, which are equivalent to that of delta network as shown in the following figure.

Given the resistances of delta network as R₁ = 10 Ω, R₂ = 60 Ω and R₃ = 30 Ω.

We know the following relations of the resistances of star network in terms of resistances of delta network.

3

Substitute the values of R₁, R₂ and R₃ in the above equations.

So, we got the resistances of star network as R_A = 6 Ω, R_B = 18 Ω and R_C = 3 Ω, which are equivalent to the resistances of the given delta network.