OK So if you only have the 600 watts per day when you are either on shore power or on a genny can you design the system to not be needed when they are off and kill that load Jerry On Feb 13, 2014 11:51 AM, "Larry Crutcher, Starlight Solar Power Systems" < la...@starlightsolar.com> wrote:
> Hi Jerry, > > The no-fault condition from the CPU is +12Vdc. A fault causes 0 volts. > These are the contactors I plan to use: > http://www.alliedelec.com/search/productdetail.aspx?SKU=70062412 > > Larry > > > > On Feb 13, 2014, at 12:38 PM, Jerry Shafer <jerrysgarag...@gmail.com> > wrote: > > So Ian clear does the fault activate the relay or does the absence of the > fault activate the relay because its usually best to have a absent or no > fault hold the relay on and if anything fails as a the relay will rest this > can be done with motorized on or contactor high load switch, you should > also look at the switch AIC rating also > Jerry > On Feb 11, 2014 4:43 PM, "Larry Crutcher, Starlight Solar Power Systems" < > la...@starlightsolar.com> wrote: > >> Hello Wrenches, >> >> We're preparing to offer Lithium batteries to some of our customers as a >> replacement to lead acid in recreational vehicles. RV batteries can have >> multiple charge sources simultaneously so I have worked out protective >> circuitry to interface with a EMS computer. To insure failsafe operation, I >> need to install 2 solenoids that will be active 24/7, opening only when >> fault conditions are met. >> >> The solenoids I have looked at (200 amp) have a coil current of about 1 >> ampere each which equates to 600Wh daily consumption. I'de like to reduce >> that BUT the computer only provides a +12v or 0 volt state. >> >> >> - Does anyone know of a latching solenoid that will work with a 12v >> hi/lo voltage state, >> - OR an interface or circuit for hi/lo to control latching relay >> - OR a solenoid with a very low quiescent current when on? >> >> >> Many thanks in advance, >> >> Larry Crutcher >> >> >> > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Change email address & 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 > > >
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