The IET is carrying out some important updates between 17-30 April and all of our websites will be view only. For more information, read this Announcement

Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 185 replies
  • Subscribers 33 subscribers
  • Views 23219 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

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?
Parents
  • 0

    I really don't see how these control signals in any reasonable system could cause additional risk Andy.



    It was just one theory - based on the apparent requirement in BS 7671 only applies to BS EN 62196 connectors - as these have CP and PP signals which as far as I can tell are 12V d.c., referenced to the c.p.c, and share the flex and connectors between the (mode 3) charge point and the vehicle. A simple short between one of these and say the N in the same connector would seem a possible source of d.c. within the loop the supply RCD sees.


    The other possibility is of course a fault between the vehicle's battery systems and mains - which I agree should be possible to design out. However I gather that at least one popular model currently on the market has a design that re-uses the same circuitry for both plug-in charging and while driving - so doesn't provide proper double-insulation between the a.c. and motive d.c. sides. Not ideal - and hopefully a bodge that VF drive or SMPSU manufacturers wouldn't have to resort to - but apparently where we are at the moment.

     

       - Andy.
Reply
  • 0

    I really don't see how these control signals in any reasonable system could cause additional risk Andy.



    It was just one theory - based on the apparent requirement in BS 7671 only applies to BS EN 62196 connectors - as these have CP and PP signals which as far as I can tell are 12V d.c., referenced to the c.p.c, and share the flex and connectors between the (mode 3) charge point and the vehicle. A simple short between one of these and say the N in the same connector would seem a possible source of d.c. within the loop the supply RCD sees.


    The other possibility is of course a fault between the vehicle's battery systems and mains - which I agree should be possible to design out. However I gather that at least one popular model currently on the market has a design that re-uses the same circuitry for both plug-in charging and while driving - so doesn't provide proper double-insulation between the a.c. and motive d.c. sides. Not ideal - and hopefully a bodge that VF drive or SMPSU manufacturers wouldn't have to resort to - but apparently where we are at the moment.

     

       - Andy.
Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines