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BOAT YACHT HVAC - Unbalanced Phases and Harmonics - Single-phase motor coggs only when feed from generators.
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<blockquote data-quote="Geoff1946" data-source="post: 534521" data-attributes="member: 28452"><p>Not much, but my thoughts.</p><p>If it's only two out of twelve similar I would be trying to find what was different about those two. I don't see how it can be a universal issue with the generator earths, etc. Hence I would firstly suspect a wiring issue.</p><p>Is there any possibility that the neutral of the problem fans has been returned to the wrong busbar, (i.e. the other generator's one) ?</p><p>Have you had a meter across one of the fans when it stalls? - or connect an incandescent light bulb and see what happens.</p><p>It sounds like you have a central controller which varies speeds on the remote fans; is that correct? If so, what happens if you swap the troublesome fans onto a different channel?</p></blockquote><p></p>
[QUOTE="Geoff1946, post: 534521, member: 28452"] Not much, but my thoughts. If it's only two out of twelve similar I would be trying to find what was different about those two. I don't see how it can be a universal issue with the generator earths, etc. Hence I would firstly suspect a wiring issue. Is there any possibility that the neutral of the problem fans has been returned to the wrong busbar, (i.e. the other generator's one) ? Have you had a meter across one of the fans when it stalls? - or connect an incandescent light bulb and see what happens. It sounds like you have a central controller which varies speeds on the remote fans; is that correct? If so, what happens if you swap the troublesome fans onto a different channel? [/QUOTE]
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BOAT YACHT HVAC - Unbalanced Phases and Harmonics - Single-phase motor coggs only when feed from generators.
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