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EV test

lyledunn
I note that there seems to be some increased focus by instrument manufacturers to facilitate the testing of the 6mA DC detection element integral in some AC charge points. You can also buy a rather expensive adaptor with testing ports If you don’t want to open the enclosure. One charge point manufacturer requires that you purchase their Bespoke tester before they will provide accreditation for OLEV. It doesn’t seem to do much and doesn’t work on other manufacturers chargers. Anyway, I digress, the question is whether the RDCDD needs site tested and what parameters should be met.
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  • 0
    When we install 100 mA time delayed RCDs there may be a performance requirement stated in BS7671 for a 200 mA fault current, but we do not test it at 200 mA, we test it at 100 mA then make the assumption that if the RCD is performing to specification at the lower current it will perform at the higher.


    So with RCD devices how many parameters do we need to test? 


    Surely one test test should be sufficient bearing in mind there can be 10 milliseconds difference in the test time result for some RCD devices depending on where it hits the cycle.


    Having an anorak moment last night I watched Big C dismantle a Hager RCD on YouTube, the test button whacks it will over 70 mA; and the company have told us to increase the test currents on our testers, precisely testing every parameter seems a bit old school now.


    Is it actually needed?


    Andy Betteridge
Reply
  • 0
    When we install 100 mA time delayed RCDs there may be a performance requirement stated in BS7671 for a 200 mA fault current, but we do not test it at 200 mA, we test it at 100 mA then make the assumption that if the RCD is performing to specification at the lower current it will perform at the higher.


    So with RCD devices how many parameters do we need to test? 


    Surely one test test should be sufficient bearing in mind there can be 10 milliseconds difference in the test time result for some RCD devices depending on where it hits the cycle.


    Having an anorak moment last night I watched Big C dismantle a Hager RCD on YouTube, the test button whacks it will over 70 mA; and the company have told us to increase the test currents on our testers, precisely testing every parameter seems a bit old school now.


    Is it actually needed?


    Andy Betteridge
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