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WHAT HAPPEN WHEN CT SECONDARY OPEN DURING LOAD
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Answer Posted / imran
In normal power transformers primary current depnds upon
the secondary current ( load on secondary side, as load
increases its secondary current increases and also primary
current increases )
While in CT primary current is independent, if CT secondary
opens secondary current becomes zero while primary current
remains as it is. Both currents counter each other during
normal operation, and if secondary opens so secondary
current becomes zero and due to the primary current ( now
no counter effect present ) its core becomes saturated and
CT may blast.
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