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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

how to work current transformer and potential transformer

Adhunik,

1 4308

what is main difference between live tank and dead tank current transformer?

Atul,

2 27065

what are the different types and applications of compressors?

 1 2729

compressor compresses air means exactly what happens?

 2 3782

can we individually produce electriciyt

 1 2752

what is the defination of 'Mass' & 'Weight'

 3 7512

Dear Friends, I have a 500KVA transformer supplying whole factory having 3 phase and single phase mixed loads. Power room has ammeters connected via CTs for individual phase. Now I know that readings shown on meter for each phase say R,Y and B are line currents. But when I want to know the total on transformer do I need to add the currents of all three phases readings shown on meter or value for anyone phase will give me the correct power load on transformer for that point of time. 2. If ammeter shows unbalanced readings for R,Y, B phases say 150, 250 and 300 respectively so can I assume that 150A i.e average of 3 will be the 3phase load currents and remaining will be 1phase currents. Please clarify my doubt.

 4 6233

what is the maximum load in MDB,SMDB and DB

 1 9600

how to wiring 20 hp motor get completated?

Alchemist,

1 3599

wich type of cable is selected for wiring of 20hp motor?

Alchemist,

5 8355

give me list of material for wiring of 20hp motor?

Alchemist,

2 4417

What are the various types of BUSBAR Schemes? explain each

NTPC,

1 4563

What are the various types of BUSBAR Schemes? explain each

Thermo,

2 34903

my motor rating is 800HP, 128Amps, 3.3kV. What is capaitor bank i can use for PF improvement to 0.990?

 3 5047

What is the Power factor of DC Power system ?

 9 36933

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Un-Answered Questions { Electrical Engineering }

WHAT IS MEANING OF Gg & Gg IN hrc FUSE

2824

operation of protection relay watchdog contact?

1924

what is the meaning of WYE and DELTA in Electric meter?

3328

at work we have a 3 phase motor but on testing one phase isnt getting a reading. it runs 24 hours a day all week. stops and starts well no noise or heating. the phase isnt down to earth.is it just a bad meter reading or not? phases one and three came up with a resistance reading of 0.4 but phase 2 couldnt get anything shows up as open circuit.

1167

what is relay what is protection & contact multiplying relays where it is used function in brief

667




Tell me in detail about c.t. And p.t. ?

710

Please tell me the formulaes while designing a substation for power Calculations in designing a 33 KV Substation?????

1363

What is the loss of power of transformer 220kv/33kv,63/80mva of % imp12.05 at 80%load

1383

Is there any guideline say about display of earthing value near to earth pit

690

what is v/f control in VFD?

1054

sugest any typical project ?

1363

Is phenomenon of resonance is harmfull fr the machine? if not or if yes please explain it?

1436

How to synchoronize the generator (with gcb,GT) to grid????? ????? from Grid iam getting power (rated 400kv/20kv) through GT and its goes to UAT.,,ST.,, now my generator(rated 20kv ) ready.,, now iam closing my GCB.,, in GT iam suddenly giving 20kv on that Gt.,, what will happend

1612

what is circuit recombiner and how it is different from circuit breaker

1364

what is the power rating of CPU, CRT type moniter, LCD type moniter,scanner Approx.

1751

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