Answer / anitha

* AC proved to be cheaper and easier to transmit the power of alternating current over long distances

* AC can be stepped up or down using transformers

Answer / subbarayalu

some of the advantages of AC over DC are
1) it can be stepped up or stepped down in voltage
2) it can be transported to longer distances
3) it can have least loss power loss due to heating.
4) it is easier and cheaper to produce
5) it is economical to trasport. etc.,
6) it is easy to design equipment
7) size of the AC machine will be small

Answer / anjan

1.generation of ac is easy
2.transmition of ac is economical upto 240kv
3. designing of switch gear is easy

Answer / adnan kauchali

The main advantage of AC over DC is that it can be easily
steeped up or stepped down using static
machines(Transformer). The power can either be increased to
extra high voltage for long transmission or stepped down to
the safe voltage for consumer use.
Except these there are several advantages of AC power

Answer / guest

generation is easy,calculation is easy.

We have a 12MW power plant & we inject 5-6MW power to Orissa GRID. For this we have a 33KV/11KV switch yard having 12.5MVA power transformer. Some times we draw power during emergency. It is observed that during Export or Import for load less than 500Kw the power factor is decreasing to 0.3 . This is happening only during export or import. During island condition TG power factor OK.Our capacitor bank is provided with our Power plant auxilliary load. Please suggest how I can we improve our power factor during low load (GRID).

3 Answers  

I want to make street light with solar system ... What may I do for procedure and how much of estimation for each material ... If any one knows guide me and inform this id : aravindd7@gmail.com

0 Answers   Suzlon,

I have a one P.F meter in my factory showing 2 phase leading and one phase lagging then what is my actual P.F.

1 Answers  

How to calculate busbar size & what is the procedure we make for determine that?

35 Answers   Auko Tex, Integra, PowerTech, Shadhin Group,

ac and dc motor advandtage,disadvantage,aplication

2 Answers   Apollo,

Based on CPI/CGPA they shortlist the candidates & than directly start Interview so there is no Written Exam or GD Only PI.Interview held @ MNNIT , ALLAHABAD On-Campus on 6th,Aug, 2007 & the Questions asked to me by Interview Board ( 4 People) are from HR/SummerTraining/BTP/Subject-core, POWER SYSTEM & MACHINE. time duration of I/V is about 15-20 Minutes. HR- Q.1 Name,hobbies & About family background ? Q2.What u know abt NTPC ?? Q3.Why u want to choose NTPC as ur Carrier's starting i.e power sector not any other Oragnisation or sector ?? Techincal Questions- Q1.What is the reason for transformer Noise ?? Q2.Which material is used for making Transformer oil & How u measure its dielectric strength & Name the test ? Q.3 Which Machine u will prefer 2 use if flammble gases are coming out at a place & why ?? Q4.What is relation b/w Transmission Lines & Communication Lines ? Q5.What is the maximum capacity Synchronus Machine & total powerGeneration in our country ? Q.6 In india Power generation is at 50Hz while in America its 60 hz ,why so ?? Advantage or disadvantage ?? Q.7 Maximum Generation Voltage in india ? Q8. What is the Voltage regulation & why its required n how much is permissible ? & causes of voltage variation ?? Q.9 Why electric shock is feel ?? n in a Electric Train why we didnt feel that ? Q.10 Have u seen/ experience of any power plant/ industry related to the power sector ? so these are the questions which not too diffcult i think was asked to me.

6 Answers   NTPC,

how to calculate cable size in diffrent loads?

0 Answers   ABB, Sterling,

What is the latest generation of circuit breakers called?

2 Answers   Focus, Oil India,

Define reserve-generating capacity?

0 Answers  

what are the advantages and disadvantages of oil filled cables over XLPE cables

3 Answers   Areva, AUVA,

how we can save electrical energy in industries,please give some inputs

3 Answers  

RESISTONS R1 AND R2 in parallel = Total R.? 1-R=R1+R2 2-R=1/R1 + 1/R2 3-1/R + R1+R2 R=R1R2/R1+R2 select one

2 Answers   BSNL, PGVCL Paschim Gujarat Vij Company Limited, TCS, Wartsila,