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Answer Posted / nilkanth tailor
In old technology UPS, thier is transformer used to step
down the voltage and givet to that circuit..coz at that
time we have no power equipment like ( IGBT, MOSFET,
BJT)..But now by using IGBT or MOSFET, we can make ups
without any transformer..in modern UPS thier is no need for
any transformer..so we can reduce the size of UPS by using
this power device./..
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