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WHAT ARE THE FACTORS REQUIRED FOR SELECTION OF TRANSFORMER
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Answer Posted / mgm
calculate all connected load like lighting load power load
motors ahu etc, calculate the 3 phase current and multiply
it with 1.25%
we will get the transformer size
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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
