[RE-wrenches] Fuse for 48 V DC

[Ray]

We've used the inline glass fuses for metering and battery fan 
applications for 20 years without trouble.  I certainly wouldn't use 
them over 5 amps though.  I actually tested these inline fuses on a 144 
vdc vehicle battery bank once, and they blew without arcing or burning.  
Of Course my name is not UL.  However, this is also the fuse that comes 
with Trimetric, Victron E-meters, and the Zephyr power vents, currently. 
Also, glass fuses were used in many DC power centers back in the day, so 
they have a long and proven track record in the 48 v dc solar industry 
for low amp applications.

I found a standard fuse holder from Grainger that is rated for 300 Vdc.  
The regular AGC fuse does not list a DC rating, which is odd, since it 
is used for DC all the time.  The ABC fuses are listed to 125 vdc and 
are fast acting.

http://www.cooperindustries.com/content/public/en/bussmann/electrical/products/electronic_smalldimension/elx_1_4_x_1-1_4_/abc.brands.cooper_bussmann.html

R. Ray Walters
Chief Technical Officer, RemoteSolar.com
BS Mech Engineering, 1988
Former NABCEP Certified, 2004-2016
Licensed Master ELectrician, Colorado
303 505-8760

On 5/24/17 12:18 PM, Jeremy Rodriguez wrote:
> How about Midnite din mount 150vdc breakers. 1-63 amp range.
>
> Jeremy Rodriguez
> Solar Installation And Design Expert
> All Solar, Inc.
> 1463 M St
> Penrose Colorado 81240
>
> Sent by Jeremy's iPhone. Sorry for typos and shorthand!
>
> On May 24, 2017, at 11:59 AM, Drake 
> <drake.chamberlin at redwoodalliance.org 
> <mailto:drake.chamberlin at redwoodalliance.org>> wrote:
>
>> Hello Wrenches,
>>
>> I'm looking for in line fuse and fuse holders for a 48 VDC systems in 
>> the 1 - 4 Amp rating. The systems can go 67 VDC. FRN-R fuses have 
>> this rating but are slow blow, 8 seconds at 500% current rating.
>>
>> Is a glass fuse and in line fuse holder, listed for this voltage and 
>> amperage, available anywhere? It seem that the default is to use 250 
>> VAC glass fuses and holders, which seems like a questionable practice 
>> to me.
>>
>> Drake
>>
>> Drake Chamberlin
>> /Athens Electric LLC
>> OH License 44810
>> CO License 3773
>> NABCEP Certified Solar PV
>> 740-448-7328
>> /http://athens-electric.com/
>>
>>
>>
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