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48v shunt trip breakers?
#1
Looking for any recommendations on a good high-power breaker that the Batrium BMS can control, for use as a 'critical disconnect' (disconnect the battery in emergency). It needs to switch 48V at >= 200A (main pack disconnect), with 48V for its control voltage. Any help is appreciated!
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#2
I guess you checked out my video?



There are also a couple of links in the description of the video.
NOTE! My links supplied in this message may be affiliated with Ebay and by clicking on them you agree on the terms.
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 100kWh LiFePo4 | 20kWh 14s 18650 |  66*260W Poly | ABB S3 and S5 Trip breakers
Upcoming: 14S 18650~30kWh
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#3
Look at this to start, good info and some examples...  http://secondlifestorage.com/t-What-type...o-consider
___________________________________
18x 300Wp solar off grid and 10x 180Wp solar tracker grid-tie
10KW 3phase hybrid inverter. 40Kwh 18650 storage (for now)
My setup: https://secondlifestorage.com/t-Instant-powerwall
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#4
Thank you daromer, wim. I will check out both the video and that thread.

I found a breaker that may work for my system. I intend the maximum current from my battery to be 200A @ 48v. So this breaker is right at the limit of what my system would be expected to provide.

http://www.ebay.com/itm/ABB-SACE-S3-S3B-...SwRwhZsDkn

One concern that I have... the breaker lists 24V as its control voltage, but my system is 48VDC. I assume that the 24V breaker is not safe to drive at 48V?
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#5
To provide the 24vdc to the shunt trip i have made a middle connection in the 48v battery string, it only uses a little bit of power when tripping ( few msec ) so not a problem with balancing or so.
I have tested the shunt up to 60v but it is not advised.
___________________________________
18x 300Wp solar off grid and 10x 180Wp solar tracker grid-tie
10KW 3phase hybrid inverter. 40Kwh 18650 storage (for now)
My setup: https://secondlifestorage.com/t-Instant-powerwall
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#6
You can just hook up a powerresistor. Me including several others based on Batrium is doing that. No need for middle string since the time its used is just a fraction of a second.

If you calculate the current needed to trip you add a resistor and do simple voltage dividing. it works fine and will save the shunt from overvoltage/current)

I have a video pending for above on how to hook it up and also make sure it can be controlled without issues Smile My first video was about external control ie take external power instead of using the built in.
wim, aatheus, Korishan like this post
NOTE! My links supplied in this message may be affiliated with Ebay and by clicking on them you agree on the terms.
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 100kWh LiFePo4 | 20kWh 14s 18650 |  66*260W Poly | ABB S3 and S5 Trip breakers
Upcoming: 14S 18650~30kWh
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#7
video is pending too long... starting to get some tiks here... Big Grin
___________________________________
18x 300Wp solar off grid and 10x 180Wp solar tracker grid-tie
10KW 3phase hybrid inverter. 40Kwh 18650 storage (for now)
My setup: https://secondlifestorage.com/t-Instant-powerwall
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#8
hahaa Smile There is only 24hour each day... I need mooooore Big Grin

So many videos on my "todo" list... so little time
NOTE! My links supplied in this message may be affiliated with Ebay and by clicking on them you agree on the terms.
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 100kWh LiFePo4 | 20kWh 14s 18650 |  66*260W Poly | ABB S3 and S5 Trip breakers
Upcoming: 14S 18650~30kWh
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#9
(09-29-2017, 10:52 AM)daromer Wrote: You can just hook up a powerresistor. Me including several others based on Batrium is doing that. No need for middle string since the time its used is just a fraction of a second.

If you calculate the current needed to trip you add a resistor and do simple voltage dividing. it works fine and will save the shunt from overvoltage/current)

I have a video pending for above on how to hook it up and also make sure it can be controlled without issues Smile  My first video was about external control ie take external power instead of using the built in.

I always forget about voltage dividers. Good idea Smile
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#10
I was looking for a 48vdc coil shunt-trip for my cargo trailer conversion - 100a dc (load) is fine as its a 14s (48v) lithium-ion battery and 3000w PIP.  

I found a nice Schneider with 48v coil range for only $32 BUT they wanted over $100 shipping - yikes I just can't sanction that (I know - its not logical as I paid just as much)!

I want 48vdc coil so I can just use the battery (thru Watchmon Expansion relay) to do the tripping and not have to have an extra 48vdc -> 24vdc converter like I have for the house system to ABB SACE.  

I found this and will try it - https://www.rivercityindustrial.com/west...p-em2353-1  


The link is "Sold Out" because I just bought the only remaining one in stock but maybe they'll get more by the time someone else is looking Smile

P.S. The shipping was only $12 
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