DC circuit breaker 250vdc

[sspeed33317]

Hello, I purchased this circuit
breaker because of the interrupt rating
In the specs it says for 250vdc and reverse feed capability, discharge/charge...

But I'm starting to doubt my choice.

Am I ok to use this breaker??

48 volt system.

Thanks

 

[DIYrich]

Rated for 100 amps.

How big a battery?
Class t fuse too?

 

[sspeed33317]

Rated for 100 amps.

How big a battery?
Class t fuse too?

It's a 48v 105ah , running a multiplus ii 3000/48. Through a 150a jk bms

Don't have a fuse , it's not up and running yet.
I will get one if it's absolutely necessary.

Thanks

 

[DIYrich]

Breaker protects the wire. As long as you have appropriately sized wire. I would set the bms discharge rate. Check temp when drawing the max. Install the class t fuse.

 

[ricardocello]

Those appear to be very high quality industrial breakers with detailed specifications.
Naturally, they are expensive ($160), but I would have high confidence in them not to burn up.
They are fully UL listed and specify a 25 kA AIC for DC applications.

Convenient link to data sheet:

https://cdn.automationdirect.com/static/specs/gladiatormccbgcb100.pdf

 

[Kornbread]

Been looking for a good quality molded case breaker. Thanks for the data sheet.

Be cautious when or if adding a fuse, as there is a large difference in interrupt abilities and what happens when they try to do their job.

 

[sspeed33317]

The breakers Andy uses "NoArk" seem to
be only available in his part of the world.
I was looking at the breaker interrupt rating
compared to the one he uses.
I don't expect to pull more than 80amps
out of my battery ,so I guess the breaker
is good to use.
I'm using 2awg per the Victron manual.

 

[RV8R]

It's a 48v 105ah , running a multiplus ii 3000/48. Through a 150a jk bms

Don't have a fuse , it's not up and running yet.
I will get one if it's absolutely necessary.

Thanks

I’m pretty much of the opinion “not to rely upon” battery BMS to replace the safety of a Class T fuse if you think a Class T is needed.

It is about “Interruption Amperages” ability ,,, DC.

A thread For You;

https://diysolarforum.com/threads/n...h-terrible-mspaint-drawing.83714/post-1090861

 

[HarryN]

A breaker is really nice to have in terms of convenience.

It makes it much more reasonable to do maintenance and check ups.