[RE-wrenches] DC Solenoid Coil Current

[frank]

Depending on load current. You may want to consider using a low on 
resistance N mos fet as the switching element.
There is almost no stand operating current.

Frank Lewon


On 2/11/2014 6:43 PM, Larry Crutcher, Starlight Solar Power Systems 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
>
>
>
>
>
>
>
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