Polarity of EATON 250Vdc shunt trip breaker

[justinjja]

I have a couple Eaton HFD2125 125A breakers but can't find the datasheet.

Does anyone know if polarity matters on this style of breaker?
Like should my battery (+) be connected to the top or the bottom of the breaker?

I vaguely recall reading that these big breakers have a magnet to force the DC arc into the arc arrestors,
But if I have the current flowing backwards is the arc going to get pulled away from the arrestors?
(Sorry if you paid more attention than me in physics class and I butchered that LOL )

Also there is a note about using 2 poles for DC, I believe that is only needed for the 250v rating, but for 16S/58Vdc I should be fine with a single pole?

 

[HRTKD]

https://www.eaton.com/us/en-us/skuPage.HFD2125.resources.html

The datasheet as well as installation instructions can be found from that link. There is a page in the installation instructions that addresses how to connect the wires. I suspect that you want to use the wiring in Figure 8.

 

[justinjja]

Thanks,
It's a little weird because a battery is both a load and a power source.

Have to treat it as a power source because the inverter output is limited by other means,
While the battery will dump a ton of amps if something goes wrong.

None of them quite match what I'm doing, but they all show + at the top.
I'm planning to do this:



I guess it ultimately doesn't matter,
In a serious fault condition I have t fuses,
The breaker only needs to cut power in an over charge/discharge situation where amps will be way lower.