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  1. Zdb
    Offline

    Zdb Regular EF Member

    Location:
    UK
    Hi guys, I'm having trouble deciphering some manufacturer's specifications / installation instructions for a three phase dual 32A outlet EV charger.

    The model in question is the W22 wall mounted unit:
    Screenshot_20180611-112248.jpg

    I can see that there are 2x 30mA RCD's inside the unit mounted on DIN rail.

    I'm unsure about the supply protective device to be used. One data sheet says 2x 40A TYPE D MCBs and the installation instructions say 80A supply.

    Anyone fitted one of these before?
     

    Attached Files:

  2. telectrix
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    telectrix Scouser and Proud of It Trusted Advisor

    Top Poster Of Month

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    2 x 40A outlets require a 80A supply. sssssimplesssss.

    using a type D MCB would mean you'll need to select cable size, not only for 80A and acceptable VD, but also to have a low enough impedance , coupled with your Ze and/or Zdb to meet disconnection times
     
  3. Gavin John Hyde
    Offline

    Gavin John Hyde Electrician's Arms

    Location:
    Somerset
    Business Name:
    Sulis Electrical Services Ltd
    not got experience of chargemaster ev units... only installed evbox and rolec. with some you effectively treat it as a consumer unit, with each connection on its own rcd and mcb or rcbo. the cable supplying the ev charger sufficient for both connections.
    on a different note there is no diversity allowed for ev chargers either and dont forget to tell the dno via uk power networks when you notify it aswell.
     
  4. DAvid Prosser
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    DAvid Prosser Electrician's Arms

    Location:
    UK
    Why do you have to notify the DNO ?
     
  5. westward10
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    westward10 In echoed steps I walk across an empty dream. Staff Member Trusted Advisor

    Location:
    Northamptonshire
    If the unit is rated up to or above 13.8kva it is a requirement to notify the DNO before installation. This is so they can map the installations and ensure their network can cope with the additional capacity.
     
    • Informative Informative x 1
  6. DAvid Prosser
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    DAvid Prosser Electrician's Arms

    Location:
    UK
    Is that just for domestic or all installations ?
     
  7. westward10
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    westward10 In echoed steps I walk across an empty dream. Staff Member Trusted Advisor

    Location:
    Northamptonshire
    Any installation.
     
  8. DAvid Prosser
    Offline

    DAvid Prosser Electrician's Arms

    Location:
    UK
    Thanks seems a bit pointless though if you are already pulling enough for several megawatts of motors.
     
  9. Gavin John Hyde
    Offline

    Gavin John Hyde Electrician's Arms

    Location:
    Somerset
    Business Name:
    Sulis Electrical Services Ltd
    • Informative Informative x 1
  10. mhar
    Offline

    mhar Electrician's Arms

    Location:
    devon
    The dnos are also regarding charging points as stores of energy. Each charged battery not being used potentially being called upon to feed the grid. In the not too distant future either
     
  11. Zdb
    Offline

    Zdb Regular EF Member

    Location:
    UK
    Thanks for all the replies :thumbsup:
     
  12. mydigitalhome
    Offline

    mydigitalhome Regular EF Member

    Location:
    Norfolk
    Curious thought chargemaster could only be installed by there own staff not general electrical contractors is that correct?
     
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