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What happen when ct secondary are open circuited? why same
thing is not happen in ordinary transformer?
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Answer Posted / bhatt
If secondary of CT is opened and as we know that primary
always flow the current and by transformaton action
secondary must flow the current but in our case secondary
is opened hence Extra high voltage is induced in terminals
of secondary which can be fatal.
In case of ordinary transformer if secondary is open
primary flows only no load current hence secondary voltage
is only rated secondary votage which is not as danger as in
the case of CT.
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