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Surge arrester on the earthed neutral point of HV transformer

essamalbanna

Electrical
Mar 31, 2013
3
I'm searching for a logical explanation or practical purpose for installing a lightning arrester at both neutral points of the transformer 220/66 KV, YNynd11, Although both neutral points are connected directly to earth through a disconnector!.
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That provides some protection when the disconnector is opened.
 

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