why we use battery source for current transformer polarity
testing?
Answers were Sorted based on User's Feedback
Answer / istiak
in measuring polarities of a transformer we use a very small
battery or dc supply voltage source.in that case,if we use
alternating current replace of D.C then we couldn't find
polarities because ac changes it's side within a few moment
and dc doesn't..................
Is This Answer Correct ? | 8 Yes | 0 No |
How can find thermal state value in relay for calculate thermal overload.
how to make an earthing certificate
What is Fan Coil Unit . How can we calculate CFM .
What is the difference between PT for metering and PT for protection ?
what happen if i connect DYn11 and DYn1 vector group transformer in parrallel?other things are same like votage ration,x/r ratiob etc...
what are the difference between AC lamp and DC lamp
what are the importance of earthing?list different types of earthing.
In what voltage EHT works(133/132/33/66kv?
why we choose 50 or 60 hertz not other value for the power system?
what is the similarity and difference between ups and inverter?
If we connect capacitor in series DC supply so what happened?
what is the diff.between neutral and earth?