Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Dear All we are having a problem in G120 BOP showing alarm A0503, F0052, F0060 we can not remove fault alarm ,Please any body help us. kowsar

TCCL,

1250

advantages and disadvantages of inverse definite minimum time RELAY

1050

why high speed tripping relay is used in protection circuit why not normal relay

839

why high speed tripping relay will be used in tripping circuit why not normal relay

819

what are all the components required to assemble solar panel other than pv cell?

952

Anybody tell me about modbus hex address of l&t trivector meter er300p??I want to read voltage,current,kwh etc via rs485...If anybody have a manual then send on my mail..Brijeshmodi18@gmail.Com

1253

how to find the voltage's of a transmission line plzz help with pictures i am not able to understand

Student,

777

I meggared my 2c*70 sq mm AL AR XLPE cable. its one end show 50 M ohm . is my cable is safe for laying. I have only one phase and neutral.

1331

How the over load setting for HT Motors calculated-provided in Numerical Relay

Damodar Valley Corporation,

1184

whether starting current is limited to rated current of motor through soft starting or it exceeds the rated current?

DAE,

1026

What is slope...? Explain slope 1 and slope 2...?

1072

How to calculate main incomer rating of APFC Panel ? Let's say i want to find main incomer for 11kV, 1000kVAR Panel.

1212

if we apply 1000ADC instead of 100ADC or We apply 50ADC instead of 100ADC,What will be happened in the test result value.Pl explain

NCC,

891

How to discuss the phase shift of transformer considering open delta?

959

Whether 3 phase induction motorwith 100 hp capacity , Amp 160 for which sensitive earth fault relay , type CTUM 15 can be used?

ONGC,

982


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Un-Answered Questions { Electrical Engineering }

nwhat are the main Components of servo motor?

1605


how unidirectional torque is produced in DC motor?

6287


A powerplant has 8 gensets operating in grid parallel mode. In one genset sometimes there is pf variation and kvar variation. The plant operates in pf mode. When this variation is observed the load is stable, voltage is also stable, freq and genset speed is also stable. How will you check the functioning of pf card. What shall be the ideal output vdc of the pfc, from there it is input to AVR?

1721


what is the difference between delta delta and star delta connection transformer? why we use delta delta transformer since it need earthing transformer for grounding?

1619


WHAT CAUSED THRESHOLD VOLTAGE TO EXIST?

3513






if main CT is of ratio 50/5, and meter CT is -/5 what will be overall multiplying factor of meter.PT is 11000/110 .

1152


why i can not use thimble on capacitor duty contactor

867


What will happen if we on 200kvr capacitor bank(11kv in bus)If there is low load on transformer (1.5 mva 33/11 kv)

1101


what is the reason the main breaker is trip during the motor is running? (some time the breaker is not trip)

1295


what is the effect of higher value of GD???

1334


How to work definite,over pluxing,revers power,OSR relay

1233


What do you understand by external characteristics of a d.c. Generator?

635


what are the factors to be considered while design the breaker either HT or LT??

1398


substation+ plc system

1614


sir plz send some previous year questions of jspl.

1469