48v breaker and shunt trip recommendations

[Arden]

Hi I'm upgrading my wall currently only using fuses but want to go with a breaker and shunt trip as have batrium4 with shunt all ready.

New wall will be 16s of 280Ah LiFePO4 batteries connected to my victron multiplus 48/3000/35/16


schneider seems to be the go to supplier but confused as to what I need

 

[Wolf]

If your predisposition is to Schneider I don't know.
I personally prefer ABB. Very reasonable if you look a bit.
Specs for the Victron are 2500W continues and 6000W surge. At surge thats 125A so you probably want to go with at least a 150A Breaker.
Possibly a 200A. You also want to get one with the preinstalled Shunt Trip just be sure it has a 24V coil.

ABB SACE S3 150AMP S3N CIRCUIT BREAKER SHUNT TRIP | eBay

<p>ABB SACE S3 150AMP S3N CIRCUIT BREAKER SHUNT TRIP. Condition is used.</p>

www.ebay.com

ABB SACE S3 150AMP S3N CIRCUIT BREAKER SHUNT TRIP | eBay

Find many great new & used options and get the best deals for ABB SACE S3 150AMP S3N CIRCUIT BREAKER SHUNT TRIP at the best online prices at eBay! Free shipping for many products!

www.ebay.com

ABB Type S3N SACE S3 150A Circuit Breaker w/ Aux & Shunt 3 Pole 600 VAC 150 Amp (EM2563-1)

ABB S3N - Molded Case Circuit Breaker<br> 150 Amps<br> SACE S3<br> Auxiliary Switch | Shunt Trip

www.rivercityindustrial.com

Wolf

 

[OffGridInTheCity]

I'm in the US. I use ABB SACE with 24v coil for my home Powerwall and can recommend them as @Wolf said above.

For the cargo trailer I found a good/used Westinghouse HFD3100 100A w Shunt ( https://www.amazon.com/Westinghouse-HFD3100-Circuit-HFD3100L-Cutler-Hammer/dp/B01FFX6XCK ) at River City Industrial for $100.

Here's their current selection of used breakers... https://www.rivercityindustrial.com/search-results/?q=shunt&page_num=2 Not pushing River City but they have interesting/extensive list of used shunt breakers and I can verify that I received exactly what they pictured

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[Arden]

Thanks for the input so far

Would the peak of the victron for less an a second really trip the breaker ?

My understanding is a b curve breaker could sit at 2 times it's rating for a while before actually tripping but could be wrong

 

[Wolf]

Would the peak of the victron for less an a second really trip the breaker ?
My understanding is a b curve breaker could sit at 2 times it's rating for a while before actually tripping but could be wrong

General characteristics of circuit breakers.
Class B trip characteristics trips instantaneously when the current flowing through it reaches between 3 to 5 times rated current.
Class Z are 2 to 3 times.
It is required that the trip current must persist for 0.1s. Not much time.
That being said you are installing this breaker as a safety device against catastrophic failure and or to shutdown the system when a sensor or device decides to trip the shunt trip. You also don't want a breaker that is just rated slightly above your "normal" current draw as it will show up as heat. Size your breaker to the max of your potential current spike with a little bit of reserve.
Wolf

 

[daromer]

I run the ABB too and have for 6+ years now. They work great and you get them 2nd hand for about 60-80USD in general. S3 for 100-200 and its larger s5 for 200-500A.
They are quite big

And as mentioned they are often 24v coils and make sure it comes fitted with it from the start.

 

[Wolf]

And as mentioned they are often 24v coils and make sure it comes fitted with it from the start.

Yes for sure.
Unless you are like me and buy all the surplus ABB Shunt Trip Y0 24v AC 50-60hz 24v DC units I can find and have them in stock.

Wolf

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[Arden]

Ok so if I went ABB which one would you recommend

 

[Wolf]

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Ok so if I went ABB which one would you recommend

One of the 3 I mentioned above. ABB SACE S3 150A w/24v Shunt trip

 

[Arden]

Thanks have some reading to do and some serious moving of components of I go with ABB

Interesting just been reading some stuff over on the victron site because the BYD cabinet comes with a 120 amp breaker the recommendation is to set the DCL discharge current limit lower due to this. Batrium does this quite well via the can bus. So might be another option if I go with the schneider.