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 3812

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

2367

WHAT IS DIFFERENCE BETWEEN CAPACITOR AND CAPACITANCE?

Manipal Hospital,

1588

what is the difference between 230v and 115v?

Bhushan Power Steel,

1 4883

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

HEC,

1 3824

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

1 3493

why earth wire is needed in a wiring system

1 3078

What is the difference between Neutral And Earth ?

Ambuja, Reliance,

2 5619

What is boost transformer in railway??

2 3136

How to select a cable size according to load

Red Bull,

1 3835

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

ERL, NTPC,

3 6501

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

ERL,

2 4758

what is difference between ac voltage and ac current

TATA,

3 6618

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 3930

What is cable gland,why does use for?

ABB,

5 9688


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Un-Answered Questions { Electrical Engineering }

what are the basic insulation levels & what its Unit

1601


We have 110Vac ,10A ac supply which is converted into 110VDC & How much DC current? which factor is reqired for dc current calulation?

4685


I want to ask that is there any relation between current denesity of copper and material purity. also is ther any standard which defines the standard current denesity of material.

1590


If only R Phase is connected in 2 pole elcb, n is not connected than it will work or not in ground fault.

1109


Why are lt windings placed near the core?

771






How much voltage we need to apply in 33kv cable during hipot test of cable

535


Starting times for soft starter & power factor is thier any standard or datas available in manufactures list. Kindly suggest.

1586


what is induction furnance? how many phase supply given io its coil for 15 or 20 ton furnance?

2845


Dear Respected sir how to test ABB REX521 protection relay by relay tester.

2410


Why a tesa lamp is glow between two phase?

1660


Can we put 3 layers of cable tray while installing tray

2073


what is the formula of starting current of 3phase and 1 phase motor???

1694


How u can give the overload setting to any motor protection relay for a HT motors with formula and Example?

1815


how to decide the capacity of accl

2050


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

2385