[alexbeatle]

Hello, Team.
Has anybody been able to figure out the control of these devices via the Front HVJB?

 

[alexbeatle]

Anybody knows what connectors are used in the power indeed here?

 

[alexbeatle]

Like what HV connectors are used on the Tesla HVJB? Those are KET HVSC 280 series, but they're not available to mere mortals :/

For reference:

• Orange (A/C): MG655773 (key A)
• Gray (fluid heater): MG655774 (key B)
• Brown (PTC heater): MG655775 (key C)
• Blue (DC-DC): MG655776 (key D)

Thanks.

Has anybody made an alternative to the infeed power connectors work? The jbox I bought doesn't have a cable.
Looking at the picture, the connector is just there to seal the round holes. The actual connections are on the inside of the jbox.

 

[alexbeatle]

The metal glands there are terminating the shielding on the cable (and sealing the holes). So if you can live without the shielding termination and can seal them some other way you can use anything.

I see. I'll examine how I can get creative with shielding. Else need to order a cable, which is not ideal.

Thank you.

 

[alexbeatle]

Yep. Been spending a bit of time pumping the collective data forum this forum and the OI forum into the OI wiki - there's a reasonably thorough section on Tesla OEM bits there now. Was kinda keeping it under wraps until it was finished, but just built up the last of it tonight

You'll find the sum of it all here: Tesla - openinverter.org wiki

This is incredible! Thank you for your efforts. This will help many of us.

 

[alexbeatle]

Instead of using the original box, I embedded the logic / fuse holder board from the Tesla FHVJB in my (aluminum) contactor box and used universal glands for shielding.

http://instagr.am/p/CN_4ISbn8nh/

I think this is what I will do too. Thanks for advise.

 

[alexbeatle]

Like what HV connectors are used on the Tesla HVJB? Those are KET HVSC 280 series, but they're not available to mere mortals :/

For reference:

• Orange (A/C): MG655773 (key A)
• Gray (fluid heater): MG655774 (key B)
• Brown (PTC heater): MG655775 (key C)
• Blue (DC-DC): MG655776 (key D)

Interesting that connectors are rated for 20A, while the ptc heater has a 40A fuse...🤔
High Voltage Fuse | xEV Parts | 제품 | KET
Same goes for the A/C compressor connector..

Do we know the wire sizes used?

 

[alexbeatle]

Instead of using the original box, I embedded the logic / fuse holder board from the Tesla FHVJB in my (aluminum) contactor box and used universal glands for shielding.

http://instagr.am/p/CN_4ISbn8nh/

Looks like this is how the FETs use the jbox as the heat sink.
Does your design do the same? If not, have you seen any overheating?

 

[alexbeatle]

Does the use of the FHVJB to control the heater eliminate the need for a contactor?

The heater temp setting is defined by the HV PWM generated by the FHVJB. Without the pwm control, the heater can only be on or off.

 

[alexbeatle]

Understand that and am assuming that the FHVJB serves as the hv contactor for the heater

If I understand correctly by looking at the PCB and the previous posts in the thread... All devices (except the fluid heater) are merely connected via fuses to the HV input, i.e. no control via the FHVJB.

The heater is controlled via PWM inside the box. If you think of PWM at 0% as heater off and at 100% heater fully on, then, yes, it can be viewed as an equivalent to a contactor, where contacts open = heater off, contacts closed = heater fully on.

Hope this explains.