Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is earth fault relay 64T, why it is used in main Incomer and neutral CT of Transformer.

2990

can we use ps class in combination with protection class in differential protection and over current protection.

1 2127

What is the output of a transformer..??

Jindal,

1 3869

What device is use for metering current at lt consumer end..??

Power Grid,

2 5523

How many devices can be connected in one zone of FACP

1802

what is interference

L&T,

1 2432

What is the maximum current carrying capacity for both copper and aluminium cables for 1sqmm?

2 3608

HOW TO CALICULATE THE LEAD ACID BATTERY AH AND HOW TO FIND THE 1.2KVA UPS BACKUP @ 1000WATTS LOAD?

2 3523

WE HAVE THE DC RECTIFIER 1500A, INPUT VOLTAGE IS 3 PHASE. HOW TO CALICULATE THE LOAD? 3 PHASE SIDE EITHER dC SIDE. PLEASE SUGGEST ME

1416

I HAVE 2 nO'S OF SYSTEMS, HOW MUCH UPS CAPACITY REQUIRED ALONG WITH 400WATTS ANOTHER LOAD? PLEASE GIVE THE FORMULA?

1 2927

can i connect wavetrap in 2 different phase in EHV line?

1373

what is ALF and ISF in current transformer?

1 11122

how can i use REF and diffrencial relay both in 1 CT core for transformer protection?

1381

can i connect REF and Differencial relay in 1 CT core for transformer protection?

1469

What is grid collapse? what is the reason for it?

1576


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Un-Answered Questions { Electrical Engineering }

What is the difference between the impedance percent and impedance voltage ?

1704


In a 3 phase 4-wire system. For a 3.5 core cable if all loads are single phase and balanced, what will be neutral current? will it be sum of all phase currents? Or it will be zero? And if loads are unbalanced what will be neutral current?

1258


can you plz send l&t aptitude questions if available its urgent plz plz plz

1653


give single line diagram of D.G distribution form alternator to main L.T panel?

7047


Can Anyone Answer anyone of these ? Q1) why direct SOLUTION of Load Flow Studies in Not Possile ? Q2)Why majority of Buses in power system are load buses Q3)Why one of the buses in Power system is taken as reference bus (slack or swing) Bus ? Q4)Bus Admittance Matrix is a sparce (means it contains some zero elements ) matrix , give reason

1364






Please give me a erda placement paper

1301


What is effect of harmonic current (Draw by VFD) on power system/ electrical Equipments ?

1655


what about electrical pannel.? What is meant by plc pannel.?

1880


why sielent pole is used only in hydro generators and not in turbo generators

3367


What are reasond for high wattage in single phase induction motors

1387


explain safety measures in alternator?

1338


Why we are use dol starter up to 10 hp

952


What is meant by full pitched winding?

643


I want to make street light with solar system ... What may I do for procedure and how much of estimation for each material ... If any one knows guide me and inform this id : aravindd7@gmail.com

1356


transformer phasor diagram under load explain it?

1678