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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
CEB,
1417The efficiency of a 100kva transformer is 0.98 at full load as well as half load , for this transformer what is the Copper loss at full load ?
2287explain which quantities change in the starting and the and the running condition in induction motor
1389what is a composite error in current transformers, why occurs & in which it will occur i.e, either metering ct/ protection ct
1799Why open circuit test of transformers is conducted at rated voltage??Why not any other voltage??
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