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What's the part of OTCC in transformer?
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Answer Posted / b.krishnaswamy
It should be OCTC-off-circuit tap changer or OLTC- On-load tap changer. OCTC is for changing the taps provided in HV side of the transformer when the transformer is out of cicuit , as the name implies, for changing the voltage ratio. In OLTC the taps can be changed when the transfomer is on load. The number of taps provided depends on the design requirements for change of secondary voltage on the + side and minus side relative to the rated voltage ratio.
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