Why are some relay circuts designed to have the ct current flow through the ne

Why are some relay circuts designed to have the ct current
flow through the neutral instead of the phase wire, such as
in some diff relays?

Question Posted / pl

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Why are some relay circuts designed to have the ct current flow through the neutral instead of the..

Answer / haseeb

this type of circuit is for the REF protection that is
restricted earth fault protection, where the current is
taken from neutral CT where as for over current current is
taken from phase CT

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