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TN-C-S Pitfalls
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<blockquote data-quote="Andy™" data-source="post: 250676" data-attributes="member: 2012"><p>yes, you can</p><p></p><p>see drawing</p><p></p><p>supose the cable from the left is the transformer and it only feeds 3 properties. 2 of them loose a neutral</p><p></p><p>house 1 is OK, since it still has both L&amp;N</p><p></p><p>but house 2 and 3 are not. there is now 400v between the incoming phases, with neutral common to only those 2</p><p></p><p>ignore external resistance (keeps maths easier)</p><p></p><p>house 2 has a resistance of 99 ohm. house 3 has a resistance of 1 ohms. so each ohm is 4v</p><p></p><p>house 2 will now be at 396 volt L-N, house 3 will be 4v</p><p></p><p><img src="http://i22.photobucket.com/albums/b314/andrew2022/02120602.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><span style="font-size: 8px"><span style="color: #C0C0C0">---------- Post Auto-Merged at 22:49 ---------- Previous post was made at 22:46 ----------</span></span></p><p></p><p>whilst there is often reported power failures (especially larger ones), i dont think any of the DNO publish what the actual fault was, wether broken L or N</p><p></p><p>and there are plenty news stories about peoples stuff being fried by upto 400 after some scumbag as stolen a neutral link from a substation</p></blockquote><p></p>
[QUOTE="Andy™, post: 250676, member: 2012"] yes, you can see drawing supose the cable from the left is the transformer and it only feeds 3 properties. 2 of them loose a neutral house 1 is OK, since it still has both L&N but house 2 and 3 are not. there is now 400v between the incoming phases, with neutral common to only those 2 ignore external resistance (keeps maths easier) house 2 has a resistance of 99 ohm. house 3 has a resistance of 1 ohms. so each ohm is 4v house 2 will now be at 396 volt L-N, house 3 will be 4v [IMG]http://i22.photobucket.com/albums/b314/andrew2022/02120602.jpg[/IMG] [SIZE=8px][COLOR=#C0C0C0]---------- Post Auto-Merged at 22:49 ---------- Previous post was made at 22:46 ----------[/COLOR][/SIZE] whilst there is often reported power failures (especially larger ones), i dont think any of the DNO publish what the actual fault was, wether broken L or N and there are plenty news stories about peoples stuff being fried by upto 400 after some scumbag as stolen a neutral link from a substation [/QUOTE]
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