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Selection of cable (voltage grade) for 230/34.5kV Trafo neutral to Ground connection (Solidly ground

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Feb 2, 2023
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Dear Team,
I wanted to confirm the voltage grade for the cable to be used for connection of the 230/34.5kV transformer neutral to ground for solidly earthed system.
Should the cable be rated for 36kV?

Thanks in advance
 
If it is connected to ground, it doesn't have to be insulated.
 
On the contrary, I thought that since it is connected to trafo neutral, it has to be rated for L-N voltage of sec. of trafo, since during the L-G fault, the potential of the N would rise to that value, hence, cable should be rated for this voltage.
This is also being followed for the NCTs.
 
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