Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

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

2080

what is the response time of relays when a FAULT OCCURS IN A POWER SYSTEM?

2 5203

What is the role of power pack in substation protection system?

Facor,

2707

why there is a high voltage line in multiplication of 11?i.e.- -66kv,11,kv,22kv

Bhel,

4 9468

how capacitor pass ac voltage practically?with increase frequency and cpacitance?

DELL,

1 4861

What is battery Amphere-hour? How the battery back up time period is calculated?

2 12356

What is Difference Between static & Dynamic Pressure of Fan & Blowers

2 11841

WHY IS THE NO LOAD CURRENT SMALL FOR A TRANSFORMER COMPARED TO OTHER ROTATING ELECTRICAL MACHINES??

1 4404

Three set (each phase contain 2 cable of 400 mmsq CU XLPE AWA) of single core cables are connected to 11 KV motor of 14 MW & the switch gear supplay is taken from 11kv feeder & this supplay taken from 275 KV substation. Problem is one pair cable(L3- 2 cable ) getting very hot & gland melted and damaged in switch gear side. the other two cable haven't any more hot(ambient temp only & L3 haveing 95- 100 Degree C. The same problem happened in 275 KV substation switch gear side also where the supply taken for 11 kv switch gear. But here L2 phese cable had problem. Why it is happening like this?. The cable having temperature different at different location from gland side inthe case of 11KV feeder of 275 kv substation. why ?

2 4504

What is the real function of reverse power relay in generator panel while syncronising?

Triveni,

2212

What is the Minimum winding resistance of motors ( small & big)? referance range

TATA,

2317

What is core CT & it's function?

2076

A 11KV, 1200 A breaker combination fixed in a cubicle for HT motor.Is normally for 11 KV motor fuse is using? if Yes, What range fuse is required?

1965

A 6.6 KV/ 440V Xformer. what are the imporatant parts & equipment required for it's protection panel.

APTransco,

2254

what are the main Parts of VCB

1 5237

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Un-Answered Questions { Electrical Engineering }

What is the comparison between 30mA DP RCCB and 100mA DP RCCB and can replace it against 63A MCB

1602

WHAT IS LOAD CELL

2160

Differentiate between ideal and non-ideal voltage sources?

1090

how ceiling fan worked?

1921

How many types of protection relays are there based on the characteristic?

1099

what is difference between earthingpits,earthing grid & earthing mess?

2518

1- What is the Polarization Index number be good for 15KV 3c#500MCM electrical cable? 2- Can I use the IEEE Std 43-2000 to perfom the PI test? Thanks

3375

what is the difference between unarmoured & Flexible cable? How to identified?

6221

how much excitation voltage required to generate 1mw power?

2048

What happens to a line-frequency of high-frequency transformer when it is first energized/ re-energize?

2160

How LT megger works ?

2138

What is installed in PAC that is control the humidity

1518

In our plant we have installed new MCC with ELR and CBCT which is detecting some leakage current in the system but it leading to some confusion when to check that in which feeder which is drawing current we put off the whole panel itself but still CBCT detecting some leakage current so can anybody ans me , where i am going wrong or how to detect whether its actual leakage or CBCT malfunctioning.

2267

do you have some of interview Questions in power and genrator section in general whith answers

2186

how is find out kwh step by step

1796

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