Isolation Monitor - Suggestions?

[Zieg]

Any progress on any of the various fronts here? It's looking more and more like the SCCA is going to be requiring these for all forms of racing.

[tom91]

Any progress on any of the various fronts here? It's looking more and more like the SCCA is going to be requiring these for all forms of racing.

I do not think the SCCA will accept a homebrew solution for a system this critical. So best bett would be to figure out if there is a American distributor of a Bender unit.

[RetroZero]

I will get back to Bender this week. They asked for a description of my project and possible opportunities in the future.... I guess they want to see if its worth their while or if this is a one off. I will incorporate the ISA shunt as the alternative and reference. That way I can compare "apples with apples"

[Zieg]

During my research (googling part numbers, really) I found a lot of references to the Bender ISO165/175 units being used in Formula SAE. Some teams said they were sponsored by Bender and provided new hardware each season.

I then found an ISO165C-1 on ebay for $400 CAD and decided to take a chance in it. Should be here by month's end.

There are also some other Bender isometers on ebay, including the ISO-CHA-425 which looks like it could work, but it requires 24vdc to operate. Other versions of the same thing seem to be available for 12vdc, but on the HV side they are only rated to 300v.

[nickyivyca]

I found a stash of IR155-3210 for sale for cheap on Ebay.
https://www.ebay.com/itm/196329086628
This seems to be the same base hardware as the IR155-3204 but sold for chargers instead of vehicles.

I've found a couple different datasheets for the 3210:
https://pamir.com/wp-content/uploads/20 ... 012821.pdf
https://www.bender.de/fileadmin/content ... D_XXEN.pdf

It's hard to tell if the differences are just in certifications and such, or if there's actually a configuration difference to the device. The second 3210 datasheet mentions the 'AMP' monitoring as opposed to 'DCP' measurement, but then the first 3210 datasheet mentions both so maybe they're interchangeable. The 3204 datasheet I have only mentions DCP.

[nickyivyca]

Comparing the 3210 to a 3204, the only difference is the missing ferrite bead (I think that's what that is) on the bottom left corner of the board, and the label applied to the brick. (The Nano-fits on the 3204 were a manual modification and not how it originally came, borrowed board from my old FSAE team to compare)

I'm guessing D,10 and A,1 are the different parameters. If the 1 is the Fave number then that would mean the 3210 is just more reactive than the 3204.

Plan to install in my 914 as part of the next round of upgrades, we'll see how soon that happens.

[thomaa]

PXL_20240430_050329480.jpg
Comparing the 3210 to a 3204, the only difference is the missing ferrite bead (I think that's what that is) on the bottom left corner of the board, and the label applied to the brick. (The Nano-fits on the 3204 were a manual modification and not how it originally came, borrowed board from my old FSAE team to compare)

I'm guessing D,10 and A,1 are the different parameters. If the 1 is the Fave number then that would mean the 3210 is just more reactive than the 3204.
image.png

Plan to install in my 914 as part of the next round of upgrades, we'll see how soon that happens.

Did you end up installing the 3120? I'm currently looking for a solution for isolation monitoring and this seems the most accessible.

[LRBen]

I found a Chinese firm doing these: https://cqbluejay.com/product/gyid-ev-dmd/

I can't remember the exact price but I think it was around £150 including shipping to the UK. But that was for five of them.


Edit: Added actual words.