What is the difference between CRNO and CRGO in an
transformer and what is the advantages of these two.
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Answer Posted / rameez raja kaleel
The correct explanation is for cold rolled grain oriented
winding have the flux density is saturated.we know the flux
density B= flux/area since Bis constant the flux is also
constant there will not be any change in the frequency
since E/F is directly propotional to flux hence the losses
in the windings has been reduced,.but i have no idea on CRNO
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What is the need of earthing transformer for delta side of a transformer. (Think of a line section between a star/delta transformer at a grid substation and delta/star transformer at a village. An earthing transformer is there at the delta side of the star/delta transformer at grid substation). As there are no ground reference there will not be fault current if a one phase is grounded. Further L-L phase will be sensed by the primary side of star/delta transformer as a L-G fault. So why an earthing transformer is required at delta side
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