Electrical Engineering Interview Questions
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Hi frnds :) plz tell me that i have 100 KVA 3 phase generator so by thumb rule 100*1.4 = 144 amps and generaly we can operate at 80% load...so it will 144*0.8 =112 amps.... so now i m confused about single phase load.....if we use that generator only for single phase the that 112 amps is total single phase load or i can give 112 amps at red 112 amps at yellow and 112 amps at blue.... i mean that total single phase load that 100 KVA generator will take is 112+112+112=336 amp ??

FWO,

2 3569

Diagram on interconnectivity of 11kv transformer with RMU (i.e, one incoming and two outgoing or two incoming and one outgoing)

2202

WHAT IS DIFFERENCE BETWEEN CAPACITOR AND CAPACITANCE?

Manipal Hospital,

1456

what is the difference between 230v and 115v?

Bhushan Power Steel,

1 4566

What is Synchronization of generator,where and how it is achieved.

HEC,

1 3587

How much area is covered by a single lightning arrestor to protect object from lightning strokes ?

1 3280

why earth wire is needed in a wiring system

1 2896

What is the difference between Neutral And Earth ?

Ambuja, Reliance,

2 5250

What is boost transformer in railway??

2 2874

How to select a cable size according to load

Red Bull,

1 3636

What is the knee point voltage of CT-100/5,15VA,5P20 ?

ERL, NTPC,

3 6072

In CT, burden is 15 VA and protection 5P20,CT ratio is 100:1 then what would be the knee point voltage ?

ERL,

2 4488

what is difference between ac voltage and ac current

TATA,

3 6147

My system is 22kv/3.3kv transformer. client is asking to use NGR, but as we have dedicated Neutral Earthing systems which has a value less than 1 Ohm. So i want solid comparision. Why i should not use NGR as my system is already protected.Can any one help me to get out of this.how should i reply on basis of some great comparision and calculations. Please help

Ariel,

2 3696

What is cable gland,why does use for?

ABB,

5 9059


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Un-Answered Questions { Electrical Engineering }

What are high pass filter and low pass filter? and What are the flowmeter ?

1492


what is the difference between b c d curves on mcb

1330


Minimum IR value of 1.1 kv grade 3.5c (300, 240,185,150,120,95,70,50,35,25) sqmm Aluminium XLPE cable and 4c (16, 10,6 & 4) sqmm cu arm cable between RY,YB,BR,RN,YN,BN,RE,YE,BE & NE.

2885


Why frame of the motor is specified?. If we mention KW and voltage level,automatically frame is decided or separately frame is compulsory to mention?.

1278


what is servo motor and how it works?

1759






How To increase Knowledge Of boliler regarding To Only Electrical Field..

1129


What are the causes of unbalanced current on 34.5kv feeder Ia=0.05,Ib= 0.25, Ic=0.15 and In=0.27 prior to tripping current are balance?

1312


How will A Medium voltage circuit breaker(11 kV voltage level) operate under short circuit fault condition whether It is having short circuit release like Low voltage circuit breaker or relay should be given?

1411


what is the difference between 2 way and 4 pole selector switch???

1857


wheather the size of windings in motor and generator are the same

1497


Can anybody please refer the best and simple book for about Protection relays and in detail of all its protection ?

1471


how tto ingress mw in turbine explain.procedure ?

1723


A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous full load has temperature rise of 42 degrees celcius after 30 min and 52 degrees celcius after 1 hr under the above operation conditions. a) calculate its final steady state temperature rise on continuous load and the heating time constatnt. b) if the motor is operated on a short load for 9 min estimate its temperature rise. c) calculate the maximum overload that can be applied on a short, 9 min rating so that the temperature rise is the same as the final steady state temperature rise on continuous load.

684


What is DC series motor?

712


working principle a.v.r. ?

1892