Electrical Engineering Interview Questions
Questions Answers Views Company eMail

if we increase frequency of line, then how will string efficiency varies with it.

2 11972

Dear all, Can anybody tell me that how to choose CT for a specific load? I have a 200kw induction motor, which ratio CT should be installed? Is there a formula or calculation that determines the CT ratio for a load? Regards.

2 5456

How to calculate KVA/VA rating of PT or CT from primary & secondary voltage or primary & secondary current?

1989

what is the difference between control transformer and Potential transformer (PT)?

1 3660

is 3-phase induction motor need a starter ? why do it so

Coca Cola,

5 6490

what is the use of the circle diagram

2 4528

what is TRCC

2 13380

How can I calculate per unit (KWH) fuel (Gas/ Diesel both) consumption 1MW unit?

1634

what is brushless generator?

Jk Tyres,

2 4222

Can we perform parallel operation of two transformers when one transformer on load?

3 4028

dear all, can any body explain that how to select an induction motor for a specific mechanical load(inertia). is there any formula or calculation then please give me. i shell be very thankful to all of you. Thank,s and Rgard,s.

1 2447

why secondary terminal of current transformer should not be open circuited?

ABB,

4 8926

In the formula : Knee point voltage = Burden X alf / class, Please inform what is alf? regards Shashidhar M.R.

2 3396

Will an earth leakage trip be activated if the component or wiring is faulty on low voltage equipment.Example An electrical Cat Scarer placed in the garden and water gets into the wiring.

1424

which type of motor is used in lift ?

7 8947


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Un-Answered Questions { Electrical Engineering }

What is transient response?

662


what is mean by dry frequency

1943


For a 6.6kV Motor it is recommended to do megger test with 500 V d.c and not more than 5kV d.c but the Hi voltage withstand test should be performed by 12kV AC. Why the dc voltage test should be limited but AC voltage withstand test could be with such a high voltage?

1702


What is rotating magnetic field?Discuss elaborately.

2147


Why 1/3 is used in symmetrical components?

1386






How to identify the start and end of 3phase 12 lead motor if U1, U2, etc numberings are lost or erased.

1714


hi, i finished b.tech eee in 2008, im worked in dg sets mfg company , now i left job in 6months back, now again i want get job core side, how can i get? is there any couses we have learn to get better oppurtunity? /

1519


How to select circuit breakers rating eg. if i select a circuit breakers of capacity 40 amps DC with operating voltage 28 volts and if i what to use same circuit breakers for 300 Volts DC application what is the current rating of this circuit breakers.

1322


Is it possible to use a S1 duty class motor for crane application (S4)? If not, why?

1899


what is EIB lighting control system? what is the advantages of this system?

3202


is there any device that works properly accept relay, it may be fuse but if i want fuse of 33kv 300 amp it is avaliable, pls give me details

1569


how we provide neutral earth on synchronising panel as per electrical standards?

1594


why ups rating in kva? and why ups are in parellel?.why isolation transformer is used in ups?

1470


EXPLAIN THE WORKING OF SERIES REACTOR IN HT CAPACITOR BANKS (FOR VOLTAGES & CURRENTS)

7554


What are the reasons for the parallel operation of transformers?

621