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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

I need to calculate the Battery bank back up for below configuration:- UPS - 120 KVA Battery Bank - 200Ah Volt of each cell - 12 V Total No of cell - 34 No's Can you please help me to get the battery back up time for above configuration...? along with formula

Wipro,

1 1423

how can i design a APFCR panel? please explain with example..

Milestone, Reliance Jio,

1 1561

why don't we use the generator as a motor? and what will happen?

987

Load 380kva eb 415v,load amps 350.Same load dg 415v,load amps 420 what reason ?

AVT Natural Products,

1 1217

Dg pf .71 i am improve pf 0.80 what capacitor connected in dg how?

AVT Natural Products, EMC,

823

1.Can we use 6.6/11KV 300sq mm xlpe 3core cable for LT use (415 Volt). 2. If we use it for LT then what is the current rating

833

How to calculate wire length,size & current? ( related to control panel)

FSS, GK Controls, Panel Tech,

1201

what is the function of a circuit breaker ?how does the circuit breaker function during normal operation of an electrical system

2 1934

Difference of induction motor & servo motor ??

Macpower CNC Machines,

871

What is the minimum permissive IR value for LT & HT motor for safe starting?

Rukmani,

1 1963

what is the CT & PT. where is it uses.what is the using that plese kindly answer me...?

Cap Gemini, JLL,

3 3128

What is the function of isolater

Getco, Gland Pharma,

4 3273

How convergengr of nr method is not dependent on selection of slack bus and how gauss siedel method depends?

857

why the field winding in dc motor is not short circuited eventhough dc supply is applied across the winding

Torrent Pharma,

976

How the annunciator works ? How to do its wiring

Ford, MSEB,

1204


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Un-Answered Questions { Electrical Engineering }

how to test and calculat the head and discharge in borewell compressor

1325


Define reserve-generating capacity?

230


What is meaning of out of phase (making & breaking) capacity And how to calculate

1220


How capacitor improves pf

765


how can we make cable shedule for controll wiring ? which details must be required for it.?

1189






How can we increase fuel-power ratio of any DG set?

941


is all the servo motors having brake?please specify which servo motors having brake for stop on position and which are not.

891


how to calculate differential current when we testing differential relay..suppose we have 1000kw generator,630amp VCB,what value we should put /inject so that relay trip the VCB? PLLZ justify ur comment

796


which VFD is better ( LT or HT)

1186


I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

1015


Which motor connection is preferable star-delta or delta-star?

228


Define characteristics impedance?

266


how can check the resistance of battery contact?

1330


what is R Core Transformer. how it differs from normal transformers. dont search in net and post the answer.

1195


how external lighting design? please give examples?

1031