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Type-A RCD failing 180 degree ramp test

Former Community Member
Former Community Member
Hi


We are testing a type-A RCD (see image: "ABB") with a METREL MI 3152 (see image: "MI 3152 test").

As the image shows, the ramp test (I delta) is failing to trip the RCD for the negative half wave.


Have oneone seen this before?


Br Sebastian
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  • Former Community Member
    0 Former Community Member

    seko:




    WB³:




    seko:



    We have tested other RCDs of this type that have passed, but it seems to only be related to this specific installation type. 



     




    Hi seko, could you clarify if you mean it is related to this specific installation, or it has happened before on this type of installation?


    Is it a new installation verification or an EICR or another purpose?


     




    It has happened before "on this type of installation". It is a new installation. 


     




    Thanks for the reply, my suggestion although I haven't ever ramp tested an RCD would be to try repeating the tests in manual mode rather than automatic, it might be that the RCD gubbins gets a bit too warm after closely repeated operations?

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  • Former Community Member
    0 Former Community Member

    seko:




    WB³:




    seko:



    We have tested other RCDs of this type that have passed, but it seems to only be related to this specific installation type. 



     




    Hi seko, could you clarify if you mean it is related to this specific installation, or it has happened before on this type of installation?


    Is it a new installation verification or an EICR or another purpose?


     




    It has happened before "on this type of installation". It is a new installation. 


     




    Thanks for the reply, my suggestion although I haven't ever ramp tested an RCD would be to try repeating the tests in manual mode rather than automatic, it might be that the RCD gubbins gets a bit too warm after closely repeated operations?

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