Answer / brandon peña

When you use a delta connection, any harmonics coming from that side are caught inside the delta. In reality, transformers used in electrical networks use the secondary winding with a delta connection since most of the harmonics come from load sources, which are connected to the secondary of all transformers. This way ensures the distribution networks don't get overloaded with harmonics.

Why in metering Ct for ammeters ct secondary side is grounded for each Ct but not in case of CBCT (Core balance current transformer)..kindly some1 highlights the reason..is it because net flux is zero?

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2 Answers   KSEB,

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what is maximum or Threshold value of current 7 voltage that a common man can withstand

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