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what will happen if the secondary of current transformer
kept open....
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Answer Posted / r. k.d
Whatever Rajkumar said is totally correct. I like to add
few points in it. when CT is open from secondary side than
it can be assumed that CT secondary resistance is infinite.
Hence, CT will try to increase mag. flex in the core and
when it will cross its rated burden it will get heated and
may explode.
Please remeber that CT will not blow if passes low current.
CT will blow in high current passed for long time only.
that s why CT get blast when short circuit current flows
from the CT.
As open secondary offers high resistance, so it will
produce high voltage accross it.
Hope its clrear.
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