Fw: OT : Wattage required for Stepdown ?

[Gareth Cook <g@xxxxxxxxxx>]

It's 1 hr charger for the 18v kit.

Back of the chargers says outputs at 2.8A

G.

Gareth Cook
IT Architect / Project Manager, SWG Sales
Office: +44 (0)1784 445166 - Mobile: +44 (0)7980 445166
email: g@xxxxxxx


----- Forwarded by Gareth Cook/UK/IBM on 27/02/2007 15:34 -----

Discussion
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ukha_d@xxxxxxx
Today 14:07

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Re: [ukha_d] OT : Wattage required for Stepdown ?
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Yes - although there will be a slight efficiency loss through the
stepdown which might result in slightly more watts on 230/240V.   You
could also use an auto transformer that basically just has one winding
with a tap half way down to produce 110V.  They're slightly better
efficiency although they don't provide mains isolation, and tend to be
cheaper.     (This auto transformer btw is the same arrangement that
allows use of US 110V X10 modules in the UK with a  bridging capacitor)
.   One of the 'all in one' US / UK converters with moulded US sockets
is the neatest if you can locate one at that rating (as it's relatively
high)

Is that 2A BTW on the 120V supply ? Quite a large figure for just a
charger , possibly a peak inrush type value.  What voltage does the
charger give out and does it quote a current for that ?

Kevin

Gareth Cook wrote:
> Got a 110v DeWalt charger here (well, its to make new HA stuff!)
>
> It's 120v in @ 2 Amps
>
> What wattage Stepdown would I need for this to take to 240v ? isnt
this
> 240v @ 1Amps equivalant ? So would be 240watts ?
>
> TIA
>
> G.
>
>  Gareth Cook
>  IT Architect / Project Manager, SWG Sales
>  Office: +44 (0)1784 445166 - Mobile: +44 (0)7980 445166
>  email: g@xxxxxxx
>













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