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Tesla Model S UMC cut open and modified to J1772

Discussion in 'Technical' started by TonyWilliams, May 13, 2013.

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  1. dmckinstry

    dmckinstry Model X 2019

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    a

    Actually, that's question I had as well. Why convert the UMC when the adapter is available. Tony, aren't you restricting your options when you're on the road?

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    OK. My fault for assuming it was for the Model S.
     
  2. TonyWilliams

    TonyWilliams Active Member

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    For anything that you're hauling along in the trunk for public charging, J1772 is going to be "it" until there is a CHAdeMO or Frankenplug adaptor.

    But, ya, this is primarily for Rav4 EV.
     
  3. TonyWilliams

    TonyWilliams Active Member

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    I ordered a couple Tesla UMC's and had them Fedex'd overnight. Here's what showed up, times 2:




    null_zpsc31dbb11.jpg



    Those pins are 31mm deep:

    null_zps03c5639d.jpg
     
  4. LuckyLuke

    LuckyLuke Model S P90DL

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    So you received 2 EU spec UMC's which are completely useless over there? :(
     
  5. TonyWilliams

    TonyWilliams Active Member

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    Yep. I suspect that the vendor in Mexico that builds the UMC's had them improperly labeled.
     
  6. markb1

    markb1 Active Member

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    So I know the connector on the right connects to the car. Is the one on the left what connects to the adapter that plugs in the wall? Haven't seen that before.

    Or I guess that's what plugs into the public charging station? Is that cable for both public charging stations and the UMC?
     
  7. Gerardf

    Gerardf Active Member

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    Happen to get any red adapters with these as well ? Sell them to us in Europe.. :)
     
  8. TonyWilliams

    TonyWilliams Active Member

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    The bottom Mennekes plug goes in the car. The receptacle on the Model S should have a small notch on the center top that allows the Supercharger plug to go in, but not allow a Supercharger plug to go in generic Mennekes receptacle on the competitor's cars.

    The top plug is what would go into the European 3 phase plug so that it can be plugged into the wall.

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    I did also order the NEMA adaptors for the North American market, and they were correct. I suspect I wasn't the only person who got the wrong UMC. These are delivered to Tesla from the vendor in boxes that hold four UMC's each.
     
  9. TonyWilliams

    TonyWilliams Active Member

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    Here's the Roaster UMC cut open:


    TeslaRoadsterUMCcutaway1.jpg



    TeslaRoadsterUMCcutaway2.jpg



    TeslaRoadsterUMCcutaway3.jpg



    ] TeslaRoadsterUMCcutaway4.jpg



    TeslaRoadsterUMCcutaway5.jpg



    TeslaRoadsterUMCcutaway6.jpg



    TeslaRoadsterUMCcutaway7.jpg



    TeslaRoadsterUMCcutaway8.jpg



    TeslaRoadsterUMCcutaway9.jpg
     
  10. TEG

    TEG TMC Moderator

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    Wow. That is not what I expected. Never intended to be serviced I gather. Why did they make it so solid inside?

    By the way, what did you use to cut it like that?
     
  11. Doug_G

    Doug_G Lead Moderator

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    Encapsulation protects the innards, helps dissipate heat, and makes it hard to reverse engineer things.
     
  12. Dave EV

    Dave EV Active Member

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    Looks like Tony used his band saw.
     
  13. nlc

    nlc Member

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    Is someone knows the relay reference used in the Model S UMC ? I actually build my own wall box, 240V single phase 32A (not based on open EVSE but on my own board because I will have more functions), and I am curious to know which relay they use.
    I will probably use this one: T92P11D22-12
    datasheet is here :
    http://www.farnell.com/datasheets/1717913.pdf

    Another question, in the Tesla Wallbox, do they integrate a breaker and a ground fault breaker (GFCI?) or just the relay, and breaker and ground fault breaker must be installed before ?
     
  14. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

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    Just like the UMC the GFCI is in the HPWC. From the installation manual:

    The High Power Wall Connector has a ground monitoring circuit that continuously checks for the presence of a safe ground connection and automatically recovers from faults. Manual testing and resetting is not required.
    Temporary problems such as ground faults or utility power surges are overcome automatically. If a GFCI fault occurs that interrupts charging, the High Power Wall Connector automatically tries to clear the fault and re-attempt charging.
     
  15. nlc

    nlc Member

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    I was talking about a GFCI breaker with manual rearmament, but if they are able to automatically try to clear the fault they cannot have a manual GFCI breaker.
    As openEVSE board, they probably just have a current transformer (CT) to measure ground fault. Somewhere I seen a photo of the inside of the UMC,but I don't remember if I seen a CT ?

    And in the HPWC, do they integrate an overcurrent breaker ?
     
  16. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

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    There is a reset button.

    There are fuses.
     
  17. nlc

    nlc Member

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  18. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

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  19. nlc

    nlc Member

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  20. TonyWilliams

    TonyWilliams Active Member

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    Yes, a regular band saw out in my garage.

    - - - Updated - - -

    The one Tesla uses is Normally Open, but I'm not sure your choice is.
     

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