Electrical Engineering Interview Questions

Transmission line design. Say, I have a 1MVA generator and 2 transformers that will have the same load. What would be the proper rating of the trasformers? Is it safe to say, that I will simply divide the total rating of the generator?

3223

what composit error,ratio error,phase error in CT and PT??

36355

Why Aluminium wires are used for High tension(HT) lines? 11 KVA/32KVA & aboue

15314

srij i need the relationship b/w KW AND KWH and with an electrical example. plz send if u can?

5062

What is the percentage loss for aluminium wire for HT line more than 11KVa

1705

When charging a 20 MVA , 33kV/6.6kV transformer through regulated (0-6.6 kV or 0-33 kV) source on no load , what will be the maximum current drawn by transformer from source and what sould be the source capacity.

TATA,

10221

I am working on a 11KV system with fault current of 40KA for 1 second. I have selected 2500MVA 11/0.433KV transformer. How can i find the impedance value for this transformer? Please help me.

PPL,

5996

what is short circuit force ? How to calculate it for Panel?

Bilt,

5488

what is the difference between high impedance REF & REF, same high impedance differential protection & differential protection for Power transformer?

8784

to improve the existing power factor whether capacitors have to be added in series or parallel.and why

5859

how to calculate the capacitor rating for improving power factor

20722

why earthing is not required on transformer prymary winding side ???

24017

8059

why the amount of voltage generated at power generating stations is 11 KV only....?

4278

In a company has been installed an analog amperemeter, this company was suplied by generator X, there is no problem in the ampere meter, rigth now this company's supplied by generator Y then the pointer in amperemeter vibrating. What happened? Why? Thank's

3418

Un-Answered Questions { Electrical Engineering }

Hello Friends, How can we recognize the CT Star Point is S1 or S2 in case of Electro Mechanical Relays and what is meant by Restraining coil in relays and what is the purpose of that.. thank you in advance..

1725

how braking & making capacity of circuit breaker are calculated?

1892

please send me the L&T Emb. sys. placement papers and entire details of pattren

1885

What is time response of the control system?

689

what is the use of power transformer in GSS.

2033

What is the important precuations need tocarried out while working with Electrolite in Battery PM?

1521

How generator NPS(NEGATIVE PHASE SEQUENCE TEST)TEST WAS DONE? PROCEDURE WITH DETAILS?

1784

Explain the following and how these are working with PLC Unit 1 I/O Module Card 2 Adaptor Card 3 Ribbon Adaptor 4 I/O bus 5 I/O Devices

1247

How to connect the chemical earthing and complete process tell me plz

1426

Why are the laminations insulated from each other?

692

33kv substation lay out details & line to line & line to earth measurements

2211

What is kirchoff ’s current law (kcl)?

680

defination of controlled shunt reactor

1827

What is transister define the transister ammiter ,base, colector.

1778

difference between semiconductor & conductor & insulator?

1935