I don’t want a shorted cell to take me down if I have more than one string of
batts. So I downsize the circuit breaker to the lowest I can get away with.
Big wires to prevent voltage drop. But the CB size in my central offices are
more load than wire based.
Just the opposite in a house where you don’t know the load that will be
presented to a receptacle but want to maximize the current available to it.
From: dmmoff...@gmail.com
Sent: Thursday, January 6, 2022 8:07 AM
To: 'AnimalFarm Microwave Users Group'
Cc: 'Chuck McCown'
Subject: RE: [AFMUG] Fusing batteries
Yeah DIN breakers for those big ones. Or breakers that snap into the rectifier
chassis.
By the way, I thought the overcurrent device should be sized based on the amp
capacity of the wire. I sometimes see people saying things like “I have an X
watt device, so I need a Y watt fuse”. What’s the purpose to downsizing the
fuse to match the device?
From: AF <af-boun...@af.afmug.com> On Behalf Of Chuck McCown via AF
Sent: Wednesday, January 05, 2022 10:20 PM
To: AnimalFarm Microwave Users Group <af@af.afmug.com>
Cc: Chuck McCown <ch...@go-mtc.com>
Subject: Re: [AFMUG] Fusing batteries
I use circuit breakers.
Sent from my iPhone
On Jan 5, 2022, at 4:54 PM, TJ Trout <t...@voltbb.com> wrote:
How is everyone fusing your high current dc stuff? we use blade fuses and gmt
fuses up to 15a, with inverters directly to the battery strings, granted they
have internal breakers I really want to fuse them if that's a good idea but
finding 100a fuses with a din rail etc is hard
On Wed, Jan 5, 2022 at 3:53 PM Colin Stanners <cstann...@gmail.com> wrote:
Sorry, 50A being the circuit breaker.
On Wed, Jan 5, 2022, 5:51 PM Colin Stanners <cstann...@gmail.com> wrote:
750 /24 = 31 amps. Sounds like it may be better to standardize on 48V. If
staying at 24V I'd recommend a 80-100A fuse in each series of batteries and
maybe a 50A or in some cases lower fuse for the site.
On Wed, Jan 5, 2022, 5:40 PM Steve Jones <thatoneguyst...@gmail.com>
wrote:
So we have some 12v 190 ah batteries and are going to be running them
in series for 24 v and pairs in parralell if we need more capacity.
Where all is fusing recomended and of what type and size?
These will be attached to 750w 1000w or 1500w ups depending on the
site. Most sites pull between 450 and 750 watts right now off the current
batteries
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