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Testing Question
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<blockquote data-quote="Phoenix" data-source="post: 361851" data-attributes="member: 8133"><p>Firts thought on reading the strt o he thread was you need an LTW series meter, and then I realised you had alread worked that one out <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite7" alt=":p" title="Stick out tongue :p" loading="lazy" data-shortname=":p" /> </p><p></p><p>The fluke multifuctions require a neutral to do the non tripping test and there is no way to cheat this, they use the D-lok system invented by robin, and as far as I know it passes a DC current N-&gt;Cpc applied gradually in order to saturate the coil of the RCD and prevent it from operating while the loop test is carried out.</p><p></p><p>All you could do in the situation described is to borrow a neutral from another circuit which must be protected by the same RCD, creating an artificial star point will not work.</p><p></p><p>All other testers including the ltw425 test at 15ma repeatedly and average the results in order to try and get a reasonabe approximation</p></blockquote><p></p>
[QUOTE="Phoenix, post: 361851, member: 8133"] Firts thought on reading the strt o he thread was you need an LTW series meter, and then I realised you had alread worked that one out :P The fluke multifuctions require a neutral to do the non tripping test and there is no way to cheat this, they use the D-lok system invented by robin, and as far as I know it passes a DC current N->Cpc applied gradually in order to saturate the coil of the RCD and prevent it from operating while the loop test is carried out. All you could do in the situation described is to borrow a neutral from another circuit which must be protected by the same RCD, creating an artificial star point will not work. All other testers including the ltw425 test at 15ma repeatedly and average the results in order to try and get a reasonabe approximation [/QUOTE]
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