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Cenex report on EV chargers
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<blockquote data-quote="Phoenix" data-source="post: 499524" data-attributes="member: 8133"><p>Some will counter that with that with its a standard DP RCD, then once its tripped, you are left with a separated supply for those five seconds so your fault path to earth has been broken anyway.</p><p></p><p>I think theres something that makes it worse as well, obviously when the solar is outputting, part of the current to run the load comes from the inverter with the grid making up the rest, lets say its a 50/50 at one partiuclar moment in time. 1kw being prooduced by the solar, and 1kwcomming from teh grid because there is a 2kw load. Surely the fault current will divide in the same way, so if you have 30ma running to earth, then 15ma from the grid, and 15ma from the inverter, only the first of those is comming through the RCD, so is it now effectivly a 60mA RCD? Though with the neutral link only the grid side is that actually true? I think I need to sit down and draw it out with good old Mr. Kerchoff.</p><p></p><p>I think we can all agree its a shoddy installation practice though, as is mixing and matching breakers</p></blockquote><p></p>
[QUOTE="Phoenix, post: 499524, member: 8133"] Some will counter that with that with its a standard DP RCD, then once its tripped, you are left with a separated supply for those five seconds so your fault path to earth has been broken anyway. I think theres something that makes it worse as well, obviously when the solar is outputting, part of the current to run the load comes from the inverter with the grid making up the rest, lets say its a 50/50 at one partiuclar moment in time. 1kw being prooduced by the solar, and 1kwcomming from teh grid because there is a 2kw load. Surely the fault current will divide in the same way, so if you have 30ma running to earth, then 15ma from the grid, and 15ma from the inverter, only the first of those is comming through the RCD, so is it now effectivly a 60mA RCD? Though with the neutral link only the grid side is that actually true? I think I need to sit down and draw it out with good old Mr. Kerchoff. I think we can all agree its a shoddy installation practice though, as is mixing and matching breakers [/QUOTE]
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Cenex report on EV chargers
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