Square-D tells me they have tested the breakers to a higher voltage (can't recall now whether it was 80V or 125 VDC) but the listing is indeed for 48 Volts. 24V battery systems are useful for a lot of applications, but the unfortunate lack of a 5A breaker means we can not use them to derive a Class 2 supply, which would make them about 10x as useful to me.
On May 15, 2010, at 9:22 , jay peltz wrote: > Hi Rebekah, > > The 48v is a max rating not a nominal rating. > So yes only good for 12 and 24v systems. > > However with CBI breakers I don't understand why the need for QO for DC > anymore? > > jay > > peltz power > On May 15, 2010, at 6:28 AM, Rebekah Hren wrote: > >> Hi, >> One thing to be clear about is whether these are listed for "48 volt >> systems," or for max 48 volts? >> I was under the impression that they were max 48 volts, meaning you really >> shouldn't use them on a system >24volts nominal. >> >> Rebekah Hren >> North Carolina >> >> >> >> http://thecarbonfreehome.com/ >> >> --- On Sat, 5/15/10, Kurt Albershardt <i...@es-ee.com> wrote: >> >> From: Kurt Albershardt <i...@es-ee.com> >> Subject: Re: [RE-wrenches] AC breakers used in DC applications >> To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org> >> Date: Saturday, May 15, 2010, 12:59 AM >> >> The Square-D catalogs are marginally clear on which breakers are listed for >> DC and for what voltages, but when I tried to select an appropriate load >> center for a DC application earlier this year I quickly ran into a number of >> conflicts in their catalogs. Here is the response from Schneider tech >> support (Case# 4845778 on 1/19/10 in case anyone runs into problems with an >> inspector): >> >> >> >> The load center catalog numbers listed below are UL LISTED, File E6294, for >> use on 48 V dc systems. The load centers listed ARE NOT MARKED for use on >> this voltage system, however are suitable for the application. QO branch >> breakers, 10-70 ampere (1 and 2 pole) are also UL LISTED for use on 48V dc >> systems. Short circuit current rating is limited to 5,000 amperes when used >> on 48V dc. >> QO24L70F, S or RB QO612L100F, S, DF, DS, DFCU, DSCU, RB, TRB or RBCU >> QO816L100F, S, DF, DS, DFCU, DSCU, RB or RBCU >> QO112L125G or QO11224L125G QO116L125G QO11624L125G QO120L125G QO12024L125G >> QO124L125G or QO12030L150G QO124L150G QO130L150G or QO112L200G or QO130L200G >> or QO13040L200G QO142L225G or >> GRB or GRB >> or GRB >> GRB >> GRB GRB GRB or GRB QO142L225GRB >> >> >> I can email the PDF to anyone who needs a copy. >> >> > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org >
_______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org