Earthing a Collocated Shelter That Feeds Separate Generators

B

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banny

we have two collocated shelter that feed from one generator and spaced from each other about 200 meter. all equipment are sensitive and need to be earthed so i have to ground both side. but its not practical bonding them together so that have an earth ground system. i want to use one Y/Y transformer to break the path of ground loop. should one side of the transformer earthed or both sides? is any body have common on that?
 
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