I am getting above 60 V as open delta voltage against single phase unit ICT at

I am getting above 60 V as open delta voltage against single
phase unit ICT at tertiary delta formed and ICT getting
trippped on NDR. ICT tested and found in order. PTs provided
on tertiary are tested and in order. what may be the reason?

Question Posted / m s dani

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I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta form..

Answer / k.prakashchandra

The question is vague

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