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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Why we need to carry out knee point voltage test of current transformer ?

Power Grid,

1 5993

wat s the electronic device used in the fan regulators recently?

2 3705

WHERE CAN I GET THE PREVIOUS QUESTION PAPERS OF Govt Polytechnic in deee 2nd year papers

1772

sir What is the different bet'n "Active & passive" sensors

Kirloskar,

3 4281

Sir Power transformer :- (in generating station) Alternator terminals side - Delta HT transmission line side - Star Why?

Kirloskar,

4 5154

sir, What is the purpose in Generating power plant is operated Lagging PF and Above 0.9 lag PF?

3 3676

in 220/132 substation in place of PT what equipment used & what r the role of that equipment

2 3352

what is resticted earth fault protection ? how did it protect & work in power transformer

3 3868

can we identify the direction of power flow in transmission line by after only looking the tower

TNEB Tamil Nadu Electricity Board,

7 14702

what is Distance protection & how did it work

2 3551

in 5 mva transformer 33/11 kv s/s what rating of capacitor bank is required & what is the fourmula for rating

6 9903

Difference between EDO and MDO breakers?

ACB,

10 54075

CBCT selection

1269

what is the knee point voltage in current transformer

2 3986

As the one point of eac phase winding is connected to each other in satr connction. Even if that at distribution side collesion of two diff phases result in to blast. Why?

1 2029


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Un-Answered Questions { Electrical Engineering }

To prove the capacity of a 10MVA transforemr with 6.5% impedance by a short circuit test how much power is needed to inject an impedance voltage if we have to arrive for its rated current?

1042


why ct ,cvt should be stored in a vertical position?

1404


For refrigerators the motor current is raised beyond its rating on both conditions when the voltage of the system is more(say 270v) than the rated voltage(220v) as well as when the voltage of system is less(say 160v) than normal voltageof 220v, why explain?

1115


how maney type tempereture measurement ?

1395


thyristor controlled APFC panel design parameter?

915






How REF protects transformer alone? explain with diagram.

564


What is the effect of pi controller on the system performance?

186


Why the power factor improvement is so important in industrial loads

913


I HAVE A INCOMING 100A MCCB TPN 25KA, CABLE LENGHT OF 80M 70MM CABLE SIZE FROM MAIN SUBBOARD TO NEW DB.BASE ON THE FAULT LEVEL SETTING OF 45KA.I WOULD LIKE TO FIND OUT 25KA ENOUGH KA. APPRECIATE IF SOMEBODY CAN ASSIST ME WITH FORMULA FOR THIS. FRM: JEFF

3007


The ripple frequency in output of fullwave bridge rectifier is a. Half the input b. Twice the input c. Same as input

1386


How halogen & merquery lamp works.

1075


what is the use of sdf?

1218


What are stable systems?

193


what's prime importance of protection in electrical system.if protection system don't work properly what can happen in electrical system?

1008


I have one ct of ratio 3000-2000/1 Amp its knee point voltage mentioned on name plate is 500-333/30mA-50mA at Vk/2. in secondary box there is three terminal named 1S1, 1S2, 1S3 then on which terminal obtained the knee point voltage ie 1S1-1S2 OR 1S1-1S3 & also specify the knee point voltage for the ratio 3000 from name plate.

1392