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Generator Earthing (Neutral Earthing loop between other nearby Generators).

Jackson Jose

In one of our recent project. There are multiple generators and individually feeding to each MDBs. Consultant instructed to loop all the Generator Neutral between each generators. Our proposal to provide individual neutral earthing for each generators. 

Is it advisable to loop Generator Neutral Earthing (These generators are not synchronizing)

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    Does this standard also tacle points like:  Earthing downstream of a UPS,  Connection of 'Clean' earth and Main earth, Connection to lightning protection downdrops?

    Others here with access to the latest versions might be able to give you more detail, but generally you'd have to read several standards together to get a complete picture - e.g. BS 7430 for the general principles, BS 7671 for electrical safety (e.g. from electric shock), BS EN 62305 for LPS, BS 6701  for telecommunications, BS EN 50310 for IT equipment and so on (and they often cross-reference each other). For likes of UPSs it's often the case of making sure the basic principles are applies in each possible operating mode (mains failed running on battery, mains present supplying power through the UPS, and on direct mains (e.g. by-pass) - occasionally adopting differing approaches in different modes (e.g. some small UPS run as separated systems when disconnected from the mains rather than using ADS).

    You might not find much about separate 'clean' earths though - most standards now go in the opposite direction and have a single common bonding network for everything, in order to keep the impedance (and therefore voltage difference) between any two points at a minimum.

       - Andy.

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  • 0

    Does this standard also tacle points like:  Earthing downstream of a UPS,  Connection of 'Clean' earth and Main earth, Connection to lightning protection downdrops?

    Others here with access to the latest versions might be able to give you more detail, but generally you'd have to read several standards together to get a complete picture - e.g. BS 7430 for the general principles, BS 7671 for electrical safety (e.g. from electric shock), BS EN 62305 for LPS, BS 6701  for telecommunications, BS EN 50310 for IT equipment and so on (and they often cross-reference each other). For likes of UPSs it's often the case of making sure the basic principles are applies in each possible operating mode (mains failed running on battery, mains present supplying power through the UPS, and on direct mains (e.g. by-pass) - occasionally adopting differing approaches in different modes (e.g. some small UPS run as separated systems when disconnected from the mains rather than using ADS).

    You might not find much about separate 'clean' earths though - most standards now go in the opposite direction and have a single common bonding network for everything, in order to keep the impedance (and therefore voltage difference) between any two points at a minimum.

       - Andy.

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