Electrical Engineering Interview Questions
Questions Answers Views Company eMail

how calculation to be done of cable size/o.h. conductor size of 11kv h.t.for the load of 2175 kw

Shell,

1 6545

6 MVA transformer secondary is rated for 725V at no load. The incommer ACB is rated at 690 V, 3200 Amp. Would there be any effect on performance of ACB due to lower voltage rating?

5 8260

power is the product of voltage and current.so we can measure the value of power just by using ammeter and voltmeter.......then why do we use a wattmeter?

5 8328

WHAT IS THE MEANING OF 'UPF'&'LPF'.... HOW CAN WE DEFINE IT? WHAT IS THE VALUE/RANGE OF EARTH WIRE RESISTANCE USED PARTICULARLY IN HOME....

2 22371

Generator protection &generator test

1 6072

transformer test

4 13098

i want to know about torque of slip ring induction motor

Ambuja,

1822

I HAVE CONSUMER WHOSE POWER FACTOR IS 65% I WANT TO INCREASE IT TO 98%.HOW TO CARRY OUT?

7 8191

OUR METER READER TAKE READING OF INDUSTRIAL CONSUMER.THEY ALWAYS ASK HOW TO INCREASE POWER FACTOR FROM 60% TO 99 % TO AVOID PENALTY OF POWER FACTOR.

3 7219

what is cogging and crawling

2 7035

What is the make of breakers, transformers, generators? What are their capacities and ratings?

1 4285

how many earthing should need for UPS, where its connected

HCL,

7 11044

1.what is electricity 2.what is electronice 3.how many modules 4.five electrical component with symbol 5.five electronice componene with symbol 6.how convert 220v.A/C to 24v/DC 7.220V.WAIRING DIAGRAM OF AMMETER/VOLTMETER/OHMMETEER

Hatsun,

1 3783

How to connect frequency meter in metering circuit?(single phase and three phase frequency meter)

3 7919

How to connect frequency meter in metering circuit?(single phase and three phase frequency meter)phase to phase or phase to neutral

ABB,

7 34393


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Un-Answered Questions { Electrical Engineering }

What is stepper motor?

831


In how we connect watt meter for open & short circuit test of a single phase transformer.

5980


How much no load current of synchronous motor

1716


In siemens S7-300 PLC, what is function and function block ? What is the difference between them ? When to use function and when to use function block ?

2799


100 MVA 3-phase alternator with earthed neutral has a reactance of 5 ohms per phase. what will be the fault MVA of generator.

1945






how to remover corona effect and hysteresis losses from contactor

1683


I have 440v power coming to facility,( not being used ) can I buy large generator, (gas) to sell power back to electrical co.

2145


iam using DM 3251 voltmeter(1 percent accuracy)for 11KV system PT ratio is 11KV/110V.can anybody explain what is the max and min voltage deviation.

1919


What happen if 200 KVAR capacitor connected to power continuesly?

1815


How to calculate capacitor bank value to maintain unity power factor with some suitable example?

789


What is the difference between PS & metering CT (5p20,0.5 etc.)? Why in PS class CT only Vk is given ? Is PS class CT is more accurate than metering CT?

791


In Power Line Communication (PLC) the wave trap is used to block communication signals from entering neighboring lines. My question is this: Why do they allow for different filtering arrangements on these wave traps? Isn't it always going to be a low pass filter since we want the power frequency to go through, and the comm signal blocked?

1632


How to calculate capacitor bank size at a load 800kVA.

1293


Give the topology of current amplifier with current shunt feedback?

839


why the difference arise between HT reading & LT reading (submeters fixed in complexes, apartments etc)if the power factos exceed from 0.9 to 1 can the ht meter reads fast?

2391