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EV CHARGING EQUIPMENT

John Peckham
I am hearing from my network of contractors, that have actually read the new 722, that they have been asking charging equipment manufactures for documentary proof to comply with Note 5 of 722.411.4.


They are getting knocked back for asking or in one case a Declaration that says the particular device complies with BS 7671. I think that is wrong to declare that as BS 7671 is an installation safety standard and not a product standard. I believe that as a minimum the equipment must comply with the Low Voltage Directive and be CE marked. I also believe that manufacturers have to issue a Declaration of Conformity. 


BS 7671 722 has numerous references to the various standards required such as BS EN 61851 that the equipment must comply with. I am thinking it may be illegal to offer the sale of equipment that does not comply with the Low Voltage Directive and is not CE marked?


I am hoping the countries top man of equipment safety standards, Paul Skyrme , sees this post and will come on and give us his expert view?


Has any forum member asked for a Declaration of Conformity from EV charging equipment manufacturers and received one?
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    Today I aim to measure an RCD or two to determine the DC characteristics.




    I;d be very interested in  any serious blinding you find - so far my rather unscientific testing has not seen anything other than a rise in threshold of about the same as the DC.

    I used a 'jammer' from a bench supply of DC with a fully floating output and a couple of wire wound resistors (one to N, one to E, started with 1k  ohms and then reduced to mul;tiples of 100 in parallel) to set the current and with a thousand uF or so of C across the DC supply to act as a fault limiters if something unpleasant came down the NE loop.

    The actual threshold of the RCD I found a bit variable from shot to shot even without the jammer, and also needed a bank of resisiors as I do not have a ramp tester.

     


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  • 0

    Today I aim to measure an RCD or two to determine the DC characteristics.




    I;d be very interested in  any serious blinding you find - so far my rather unscientific testing has not seen anything other than a rise in threshold of about the same as the DC.

    I used a 'jammer' from a bench supply of DC with a fully floating output and a couple of wire wound resistors (one to N, one to E, started with 1k  ohms and then reduced to mul;tiples of 100 in parallel) to set the current and with a thousand uF or so of C across the DC supply to act as a fault limiters if something unpleasant came down the NE loop.

    The actual threshold of the RCD I found a bit variable from shot to shot even without the jammer, and also needed a bank of resisiors as I do not have a ramp tester.

     


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