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.
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.
Indeed - if for instance someone mistakenly installed a 100mA (non-delayed) unit instead of a 30mA one - chances are it would pass if only subjected to a 40ms/250mA test - yet it would hardly provide adequate additional protection.
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.
Indeed - if for instance someone mistakenly installed a 100mA (non-delayed) unit instead of a 30mA one - chances are it would pass if only subjected to a 40ms/250mA test - yet it would hardly provide adequate additional protection.
