Tesla Model S UMC cut open and modified to J1772

[dmckinstry]

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Tony this is really impressive! But I'm wondering...Why are you changing the connector?

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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I can answer for him, he has a RAV4EV, and wants a portable solution to charge at 40A on the road (think RV Parks), the Model S UMC with a J-1772 connector is a way to get that done, and he can use all of the different adapters Tesla has availble.

FYI: a the RAV4EV has an onboard 10KW charger, same as the Model S (Tesla makes it, in fact)

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

 

[TonyWilliams]

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.

 

[TonyWilliams]

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

Those pins are 31mm deep:

 

[LuckyLuke]

So you received 2 EU spec UMC's which are completely useless over there?

 

[TonyWilliams]

So you received 2 EU spec UMC's which are completely useless over there?

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

 

[markb1]

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?

 

[Gerardf]

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

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

 

[TonyWilliams]

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?

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

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.

 

[TonyWilliams]

Here's the Roaster UMC cut open:

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[TEG]

Here's the Roaster UMC cut open...

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?

 

[Doug_G]

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

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

 

[Dave EV]

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

Looks like Tony used his band saw.

 

[nlc]

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 ?

 

[jerry33]

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 ?

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.

 

[nlc]

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 ?

 

[jerry33]

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.

There is a reset button.

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

There are fuses.

 

[nlc]

Ok thank you, searched about fuses and found that : http://www.edmunds.com/tesla/model-...a-model-s-high-power-wall-connector-flaw.html
So I will probably add fuse in my wallbox by security if someone forget to put a breaker in the installation !!

 

[jerry33]

Ok thank you, searched about fuses and found that : http://www.edmunds.com/tesla/model-...a-model-s-high-power-wall-connector-flaw.html
So I will probably add fuse in my wallbox by security if someone forget to put a breaker in the installation !!

That has been fixed for some time.

 

[nlc]

Found my answer here : My Nissan Leaf Forum View topic - No-Name 70 amp J1772 plug to 75 amp ITT plug/Tesla UMC mod
They use a T92S7D12-24, thus the same serie I choosed (T92P11D22-12)
That's great it means this relay is good for a continuous 32A charge

 

[TonyWilliams]

Looks like Tony used his band saw.

Yes, a regular band saw out in my garage.

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Found my answer here : My Nissan Leaf Forum View topic - No-Name 70 amp J1772 plug to 75 amp ITT plug/Tesla UMC mod
They use a T92S7D12-24, thus the same serie I choosed (T92P11D22-12)
That's great it means this relay is good for a continuous 32A charge

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