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Do-It-Yourself (DIY) Question & Answer Forum
Unbalanced loads on a 3 phase RCD
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<blockquote data-quote="Rob_the_rich" data-source="post: 445866" data-attributes="member: 8419"><p>I think I see why. On the mans supply, the neutral will be referenced to earth at the transformer. When the mains DP RCD trips, that reference is lost and the live conductors from the solar are only referenced to earth via the earthing at the inverter. This could be of higher resistance, therefore the current flowing to earth would be less, not enough to trip the PV RCD.</p></blockquote><p></p>
[QUOTE="Rob_the_rich, post: 445866, member: 8419"] I think I see why. On the mans supply, the neutral will be referenced to earth at the transformer. When the mains DP RCD trips, that reference is lost and the live conductors from the solar are only referenced to earth via the earthing at the inverter. This could be of higher resistance, therefore the current flowing to earth would be less, not enough to trip the PV RCD. [/QUOTE]
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Unbalanced loads on a 3 phase RCD
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