Electrical Engineering Interview Questions

I have 4 DG set with 1500KVA rating. system breakers are 11KV & alternator are 415 Volts. i want to Know what is max. resistance for body earthing & 415 & 11KV V Neuteal earthing. my fault current is 14 times for 2 sec.

4018

WHAT IS THE SIGNIFICANCE OF VECTOR GROUPS IN TRANSFORMER? WHAT WILL BE EFFECT WHEN PHASE DISPLACEMENT CHANGES IN TRANSFORMER?

19920

what is the function of CRGO in a Transformer?

6699

what happens when a DC supply is given to AC motor?

16372

what is the difference between elcb,rccb,mcb.

HCL, RCCB,

33781

I have a shop heater with a 1/3 hp capacitor start, induction motor driving the fan. Intermittently, the fan motor speeds up significantly for several seconds (15-60 sec) then slows to normal operating speed. The manufacturer suggested changing the capacitor which made no sense, but I did it to no avail. Could this possibly be caused by the centrifugal switch intermittently reconnecting the start winding?

1681

how we masure a cuurrent?

3038

when we increased the current what do ?

815

how we calculate the dick for a pole?

788

name the types of insulatter?

4567

what is the principal of star delta starter?

40215

HOW TO BUILD THE SINGLE PHASE TO THREE PHASE CONVERTER? CAN PROVIDE ME CIRCUIT..THANKS

931

I have 4 DG set with 1500KVA rating. system breakers are 11KV & alternator are 415 Volts. Between alternator & breaker one stepup transformer used. i want to Know what is max. resistance for body earthing & 415 & 11KV V Neuteal earthing. my fault current is 14 times for 2 sec.

1090

Power factor =1.000 at factory in supply. However, PF = 0.8 at motor end. Current = 100 Amp, Voltage = 400 V. What is the power distribution loss? Can I reduce it by adding capacitor at the load feeder?

843

How to calculate the current rating of power cables ?

4727

Un-Answered Questions { Electrical Engineering }

Dear sir, my knowledge about cable size determination is limited. Though I read examples I could not calculate the Cable size required for electric driven pump 40 KW, 380 Volt, 50 HZ, 50 meter from transformer and it is three phase star delta starting. Please help as there is no one in my surroundings to help.

444

What is the maximum and minimum rating of UPS?

183

why ct ,cvt should be stored in a vertical position?

1018

what work will do diffrential realay DG set

1452

circuit diagram of trip circuit supervision relay

797

hello everybody. what does an abnormal stator winding impedance or dc resistance show? thanx

756

HOW CAN WE DECIDE THE SUPPLY VOLTAGE FOR MOTOR ACCORDING TO ITS RATING(IF ANYONE KNOWS GIVE IT WITH EXAMPLE AND ITS CALCULATIONS)

717

condition Autotrip facia come on control panel of electrical transmission line?

275

What is the difference between line drop and percentage line drop?

264

hwat type of motor is used in thermal gas turbine hydro nuclear power plants and why

740

what is meant by 3rd hormonics ?

679

Factory acceptance test. FAT. For 132 kv transmisstion towers what is that meaning and what are the tests commonly companies perform now days.

393

what is the operating time for LBB and how does the LBB relay realise whether cb is opened or not?

615

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

77

What type interview questions ask in Electrical technicians

495