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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is the need of earthing transformer for delta side of a transformer. (Think of a line section between a star/delta transformer at a grid substation and delta/star transformer at a village. An earthing transformer is there at the delta side of the star/delta transformer at grid substation). As there are no ground reference there will not be fault current if a one phase is grounded. Further L-L phase will be sensed by the primary side of star/delta transformer as a L-G fault. So why an earthing transformer is required at delta side

CEB,

1523

Can i replace Earth leakage relay to the faulty Earth Faulty Relay

1570

How to Calculate KA Rating of Main LT Panel

1805

Control wiring of a dol starter for forward and backward

Basj Industries,

1649

why transformer tank is in rectangular shape what happen when it is in step shape

1520

The efficiency of a 100kva transformer is 0.98 at full load as well as half load , for this transformer what is the Copper loss at full load ?

2390

How to calculate Temp from Resister from PT100 equation,

1815

explain which quantities change in the starting and the and the running condition in induction motor

Gulf Spic,

1513

what is a composite error in current transformers, why occurs & in which it will occur i.e, either metering ct/ protection ct

1921

Why open circuit test of transformers is conducted at rated voltage??Why not any other voltage??

1732

Why the power factor improvement is so important in industrial loads

2134

How can we convert 11 kv to 440 volt without using transformer ?

Electrical,

1489

can we use engine degreaser for electrical motors?

1818

Why auxiliary transformers are not connected in parallel in primary stations?

Adweb,

1476

What will happen if i used 11KV earth ht kit to 11 KV / 11 KV cable termination?

1487


Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

The efficiency of a 100kva transformer is 0.98 at full load as well as half load , for this transformer what is the Copper loss at full load ?

2390


What is the effect on in Zone and out zone fault if Phase side CT is Vk/2<30 mA and Neutral side is CT is Vk/4<30 mA for Transformer REF protection

3872


In three pin plug 6 amp. 220V ac rating. Why earth pin diameter is higher than other two pin? What its purpose ?

1280


there are cam operated switches - why we call cam operated , What is cam ?

1980


why we need to us lenz's law for synchornous motor

2635


Dear Mr B C pal...Can you plz. put some light on principle of operation of Z-Ct in conjunction to its use with 1Cx1000Sqmm HT Cables & Directional Ground Fault / Over Voltage Relays...Regd..Parag v K 9899115632

2821


how to calculate distance between busbar supporters for LT panel, what are the factors influencing in this design

5407


Wind mill

1960


i want design of D.C.MOTOR 1HP 960RPM AND 2HP 960RPM ITS URRGENT

2024


please send me RRB electrical engineer previous year questions for Sr. Section Engineer

2019


Which power will flow first if we switch on a motor Active or Reactive? How?

5725


HAI SENT HPCL APTITUDE QUESTION PAPER, MY EMAIL ID IS angus_eee04@rediffmail.com,angus_eee04@yahoo.com

2326


What is synchro?

1249


what questions are asked in the interview for the post of an electrical maintenance engineer in FMCG companies?

2764


can we use engine degreaser for electrical motors?

1818