Electrical Engineering Interview Questions

Questions
Answers
Views
Company
eMail

wat is the difference between real power and reactive power..which is useful..?and how it s useful..wat is the effect of these on a power system...

ABB,

why AC signals are represented by sinusoidal waveform?WHY other waveforms not used for representation

In tranformer winding Connection Like Dyn1 ,so LV lags Hv by 30 deg and Dyn11 LV lead HV by 30,so how do this lagging and leading afffect the transformer??

Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

what is tri state logic gate

how u measure/calculate renge of capacitor,capacitor has no any rating tag.what is the theory of measure of capacitons.

33kv Rated output avilable in market (any where in india)

why we use Test Terminal Block in 11 KV and 33 KV electrical panels.

if the number of poles generated in stator and rotor side of an induction motor are different then what will happen and why?

What is Harmonics how it is produced and what is the method to control the same

What is power distribution criteria for converting single phase unbalanced residential load to 3 phase star connected balance system. Does total KW converted to 3 Phase. Means Divided by root 3.

I want to know all basics of electrical engineering

What is meant by time harmonics and space harmonics?

how to operate and maintenance of 1500 kva diesel generator set

why use phase displacement in transformer.and effect of phase displacement on transformer

What is the Good Earth resistance value of G.I & Cu. Chemical Earthing & Normal Pipe Earthing?

how to calculate the loss tangent of electrical cables

Can I use star delta connected induction motor for dual supply voltage?

Dear all, I just want to ask an expert on this forum for some insights. For the magnetic balance test, when applied voltage on a Delta-Star transformer e.g. Dyn11, the following relationships apply for HV side: 1. H1-H2 = H2-H3 H3-H1 2. H2-H3 = H3-H1 H1-H2 3. H3-H1 = H1-H2 H2-H3 For the LV side also: 4. X1-X0 = X2-X0 X3-X0 5. X2-X0 = X3-X0 X1-X0 6. X3-X0 = X1-X0 X2-X0 Is there a similar pattern for Y-d, Y-Y, D-d? And how about Y-z, D-z, Z-y transformers? I've tested a YNzn5 transformer and for LV side I don't see the pattern. In this particular case I got for LV side the following (see values below): H1-H0 H2-H0 H3-H0 X0-X1 X0-X2 X0-X3 128.0 119.9 7.2 29.2 13.3 15.8 70.7 128.4 59.2 23.4 22.0 3.6 7.2 120.1 128.1 13.4 29.3 15.8 What is the relationship here for LV? For row 1 I see the relationship, for row 3 I also see but it's shifted, but for row 2 I don't see such relationship. Any suggestions, answers, someone?