Answer Posted / xxx
per unit impedance of a transformer is the fraction of the
voltage applied when the current is equal to the rated
current when the terminals are shorted.For example, if a
transformer has 0.05 pu impedance (on percentage terms, you
say that transformer impedance is 5%), full rated current
will flow in the primary and secondary if you apply 5% of
the rated voltage to the primary after short circuiting the
secondary terminals.In other words, if full voltage is
applied to the primary of the transformer and the secondary
terminals are shorted, the current will be 1/(p.u
impedance) p.u. ie; in the above example of the transformer
with 5% impedance, the current will be 20 p.u. (ie; 20
times the rated current).
This definition can be extended to other electrical
appliances also.
Is This Answer Correct ? | 4 Yes | 1 No |
Post New Answer View All Answers
plz send me the procedure and syllabus for mseb exam
Write a note on Treatment for electric shock.
what is mean by descripiency relay? & wht is its ansi code?
although ckt breakers have taken the place of old fuse. But instead of it , these older ones are still used in the industries and homes ? why .... what are their advantages and disadvantages ? which one is leading and winning the race and competition ?
how can tell us the AC indoor or outdoor which Tr and formulls
i have interview in Pepsi company what type of question will ask please send the question and answeer
Explain about technical and non technical losses in distribution system?
how does the terminal voltage of transmission lines increase when a capacitor is connected???? This happens not only in transmission lines but also in all circuits. How??? When a capacitor is connected in a transmission line, capacitor also takes energy from the same supply. But how is it able to increase the terminal voltage??? Practically What sequence of events happen during increase in voltage???
what is two point starter?
what is diff. between earthing grid,earthing mess, earting grid?
I have finish diploma electronics and five years experience in electrical field in ht service how can i get c licensce or other electrical certificate
who invented active elements? plz give me the complte details of active elements...
What are merits & De-merits of State-Space Method? What is series programming, parallel programming, general programming & direct programming ? And, difference between these programmings Techniques ?
Which material is used for the core of a transformer and why?
What is pd controller?