apologies if you are already aware of this but with respect to the x5 or greater test current introduced in the 18th, Hager have advised that their RCBO units are manufactured to the 2017 amended version of BSEN61008/9 which permitted disconnection within 40ms at 250mA. Thus they advise testing at x 5 on both sides with the instrument set for 50mA on the variable range.
My personal take is that it is not tripping at large fault currents that is the case that needs a test, such as a short inside some class 1 equipment from L to the CPC .
The far harder test to pass, and the thing that could be the life and death moment, is the one where someone has a dog or lawnmower chewed extension lead in one hand, and walks out onto the sightly damp lawn in sandals.
That updated guidance from Hagar seems to be basically the same as their earlier, and is to me clear what they think about a 30mA test.
The 1x test is no longer a requirement but could of course be carried out. ...
The problem I see is that as the advice as written it may well be possible to have an RCD that does meet 40ms at some arbitrary high current but would not do the required at 30mA.
I have a sneaking suspicion that what was lost in translation should have been more like 40 ms when testedat currents equal to AND higher than.
So that would mean that it must make 40ms at 5 times, and must not respond more slowly at any higher currents. It is hard to see why that failure mode would occur however, and that is sadly not what it says.
My personal take is that it is not tripping at large fault currents that is the case that needs a test, such as a short inside some class 1 equipment from L to the CPC .
The far harder test to pass, and the thing that could be the life and death moment, is the one where someone has a dog or lawnmower chewed extension lead in one hand, and walks out onto the sightly damp lawn in sandals.
That updated guidance from Hagar seems to be basically the same as their earlier, and is to me clear what they think about a 30mA test.
The 1x test is no longer a requirement but could of course be carried out. ...
The problem I see is that as the advice as written it may well be possible to have an RCD that does meet 40ms at some arbitrary high current but would not do the required at 30mA.
I have a sneaking suspicion that what was lost in translation should have been more like 40 ms when testedat currents equal to AND higher than.
So that would mean that it must make 40ms at 5 times, and must not respond more slowly at any higher currents. It is hard to see why that failure mode would occur however, and that is sadly not what it says.
