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TN-S with and without Neutral conductors

Nick Parker

Hello everyone,

What are the advantages/disadvantages of using TN-S system with and without Neutral conductors?. Where does it find its application?

ef55b21f1eb9a73bb3f7e8e85eaf7368-huge-tns_without-neutral.png
Without Neutral
387a1fc1393546c05a30da338234ce61-huge-tns_with-neutral.png
With Neutral
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    You can even connect single-phase loads to a 3-wire system without N - just as long as they run at 400V (rather than 230V) - occasionally found in things like floodlighting and welders.

    Outside of 230/400V systems, you can have say 133/230V 3-phase systems and connect single-phase loads between two lines … much of the near continent used to favour such an approach for public supplies in the distant past.

       - Andy.

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  • 0

    You can even connect single-phase loads to a 3-wire system without N - just as long as they run at 400V (rather than 230V) - occasionally found in things like floodlighting and welders.

    Outside of 230/400V systems, you can have say 133/230V 3-phase systems and connect single-phase loads between two lines … much of the near continent used to favour such an approach for public supplies in the distant past.

       - Andy.

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