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Electrical Engineering Interview Questions

how to work current transformer and potential transformer

4020

what is main difference between live tank and dead tank current transformer?

Atul,

25925

what are the different types and applications of compressors?

2362

compressor compresses air means exactly what happens?

3490

can we individually produce electriciyt

2445

what is the defination of 'Mass' & 'Weight'

7019

Dear Friends, I have a 500KVA transformer supplying whole factory having 3 phase and single phase mixed loads. Power room has ammeters connected via CTs for individual phase. Now I know that readings shown on meter for each phase say R,Y and B are line currents. But when I want to know the total on transformer do I need to add the currents of all three phases readings shown on meter or value for anyone phase will give me the correct power load on transformer for that point of time. 2. If ammeter shows unbalanced readings for R,Y, B phases say 150, 250 and 300 respectively so can I assume that 150A i.e average of 3 will be the 3phase load currents and remaining will be 1phase currents. Please clarify my doubt.

5709

what is the maximum load in MDB,SMDB and DB

9300

how to wiring 20 hp motor get completated?

3251

wich type of cable is selected for wiring of 20hp motor?

7662

give me list of material for wiring of 20hp motor?

4083

What are the various types of BUSBAR Schemes? explain each

NTPC,

4321

What are the various types of BUSBAR Schemes? explain each

33953

my motor rating is 800HP, 128Amps, 3.3kV. What is capaitor bank i can use for PF improvement to 0.990?

4554

What is the Power factor of DC Power system ?

35920

Un-Answered Questions { Electrical Engineering }

what is V.L.F. testing of power cable? do you know the voltage ratings, like for what rating and size of cable what rating of V.L.F. testing is used?

1713

what is the difference between rectifier and converter and commudator?

1268

What are the different sign conventions used in electric circuits?

452

explain all the classes with example

1307

we have provided 30 nos. relay contacts in panel.I want to know how do we do the numbering for the relay contacts as per any applicable standards

1385

what is meant by tranformer impedance?

1969

how to increase or decrease speed in DC shunt motor by DC convertor

1515

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?

1332

What is sensitivity of a measurement?

521

how to handle 2500 kva transformar

964

How to justify this statement ??? "Capacitors in series provide less capacitance but higher voltage breakdown rating for the combination"

1279

I am inpecting a 10kVA UPS what tests should i do and should i observe?

1580

whats the application of voltage regulation? and whats the voltage regulation's device?

1257

How capacitor improves pf

1011

What is inrush current?

478