AFDD Trip times

Former Community Member over 4 years ago

HI, just wondering how people are testing domestic AFDD'S

I have been testing 30ma single pole AFDDs and im getting rcd disconnection times of roughly 80ms on 1x.

Is this normal? they consistently come up with around 80ms which is obviosly over the permissable 40ms.

my question is am i testing these wrong? is there a different way of procedure to test these devices? they are all the wylex brand if thats any help.

many thanks in advance for your responses

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0 mapj1 over 4 years ago

UK doesn't need AFDDs, for the matter all of the IEC world.

I'm inclined to agree, I'm not even convinced by the sparse data available from the US experience that they are all that especially useful in 110V land either, but neither of us are writing the UK regs.

If we did they'd look a bit different.

And there would not have been discussion threads like these where the need for AFDDs or otherwise is discussed at length.
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0 mapj1 over 4 years ago

UK doesn't need AFDDs, for the matter all of the IEC world.

I'm inclined to agree, I'm not even convinced by the sparse data available from the US experience that they are all that especially useful in 110V land either, but neither of us are writing the UK regs.

If we did they'd look a bit different.

And there would not have been discussion threads like these where the need for AFDDs or otherwise is discussed at length.
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three

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five

M.
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AFDD Trip times

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