Hi Amp Interupt Capacity Circuit Breakers

[michael pierzga]

Sure...Ive got a 24v 1500 amp battery bank. What is an automatic battery cell monitoring system ...how does it work...heat sensors ?

[jehardiman]

Originally Posted by michael pierzga

Sure...Ive got a 24v 1500 amp battery bank. What is an automatic battery cell monitoring system ...how does it work...heat sensors ?

Different cell types and system requirements have different sensors but generaly temp, electrolyte level, s.g., present voltage, present amp draw, % charge, Ah left, H2 levels, are all things that are monitored. There is a fairly wide variety of systems out there from those for computer backup lithium cells to electric car systems, to 1MW submarine wet cell stacks (which is where the copper bus bar and an axe comment comes from). Just google "automatic battery cell monitoring system"

[cyclops2]

A QP 20 or 30 amp household circuit breaker, ranges from 5,000 to 10,000 interrupting amps. Home Despot & Lowes

[DCockey]

Originally Posted by cyclops2

A QP 20 or 30 amp household circuit breaker, ranges from 5,000 to 10,000 interrupting amps. Home Despot & Lowes

That may be an Alternating Current only rating. Battery banks on boats are Direct Current. Interupt ratings are frequently higher for AC than for DC because with AC the current goes to zero twice every cycle.

[cyclops2]

Does this help ?

Grainger.com sells the Schneider Electric Company line of DC circuit breakers that are rated for 10,000 amps DC interrupting capacity, with adjustable high & low trip points.

[cyclops2]

Square D had their QO breakers rated in both AC & DC.

To be fail safe with DC batteries.
ALWAYS put in a fuse. They never have a bad day.
When you are unsure. ALWAYS put in a fuse.

[Willallison]

Thanks all... will look into it further.....
Personally, I couldn't see the problem with a T fuse.... but I was asked the question and I hadn't looked into such larger interrupt capacity breakers before....