1. What does mean of "PS" stand for Diff. CT class?
2. What is the formula of KW for 1Phase load inturms of
voltag,current & P.F.?
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Answer Posted / bimal sahoo ( nit surat)
there are many secondary cores in a CT (4 or 5)
some for measuring some are used for protections.
in case of special protection the accuracy class defined is
known as SPECIAL PROTECTION CLASS or PS.
the product of VA burden and ALF(accuaracy limit factor) for
such a CT is around 150.
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