Electrical Engineering Interview Questions
Questions Answers Views Company eMail

I have 4 DG set with 1500KVA rating. system breakers are 11KV & alternator are 415 Volts. i want to Know what is max. resistance for body earthing & 415 & 11KV V Neuteal earthing. my fault current is 14 times for 2 sec.

5283

WHAT IS THE SIGNIFICANCE OF VECTOR GROUPS IN TRANSFORMER? WHAT WILL BE EFFECT WHEN PHASE DISPLACEMENT CHANGES IN TRANSFORMER?

23454

what is the function of CRGO in a Transformer?

9368

what happens when a DC supply is given to AC motor?

22259

what is the difference between elcb,rccb,mcb.

HCL, RCCB,

38586

I have a shop heater with a 1/3 hp capacitor start, induction motor driving the fan. Intermittently, the fan motor speeds up significantly for several seconds (15-60 sec) then slows to normal operating speed. The manufacturer suggested changing the capacitor which made no sense, but I did it to no avail. Could this possibly be caused by the centrifugal switch intermittently reconnecting the start winding?

2659

how we masure a cuurrent?

5335

when we increased the current what do ?

1499

how we calculate the dick for a pole?

1656

name the types of insulatter?

6789

what is the principal of star delta starter?

44349

HOW TO BUILD THE SINGLE PHASE TO THREE PHASE CONVERTER? CAN PROVIDE ME CIRCUIT..THANKS

1596

I have 4 DG set with 1500KVA rating. system breakers are 11KV & alternator are 415 Volts. Between alternator & breaker one stepup transformer used. i want to Know what is max. resistance for body earthing & 415 & 11KV V Neuteal earthing. my fault current is 14 times for 2 sec.

1781

Power factor =1.000 at factory in supply. However, PF = 0.8 at motor end. Current = 100 Amp, Voltage = 400 V. What is the power distribution loss? Can I reduce it by adding capacitor at the load feeder?

1527

How to calculate the current rating of power cables ?

5707

Un-Answered Questions { Electrical Engineering }

Difference between RCCB, RCBO and ELMCB.

3476

What is the difference between PLC and Embeded system

904

how does it help for selection of a transformer.

1291

Give details on how you intend to handle a challenging position you are posted to manage unexpectedly as a company staff?

2802

how we sesign the transformer give some specifion regarding design of transformers

1389

i need mat lab program to find out the transmission line losses,regulation and losses

1372

Why induction motor is widely used in industry

2193

Benifits of 3ph 4 wire metering over 3ph 3 wire

1947

what is meant by moulded case circuit breaker ?

1619

Operation of isolators.

1374

what is the Transformer Impedence?How can calculate?

1398

Whether should be the oil level in OCTC transfomer? It should be upto winding immersed completely or should be upto tap changer s/w? How it will affect the performance of the transformer. Rating may be 33KVA

1346

Dry type transformers

1326

What is negative sequence over voltage element?

1368

how do i commission a distribution transformer knowing all its ratings and transformation ratios?d

3783