Re: transformer 110 to 240
- From: "Tom Biasi" <tombiasi@xxxxxxxxxxxxxxxxxxx>
- Date: Fri, 6 May 2005 15:47:49 -0400
"mystraightroad" <mystraightroad@xxxxxxxxxxx> wrote in message
news:1115406431.877205.181570@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Hello
>
> total novice at this so I'm hoping someone can help. I have a USA
> appliance and the spec is given as:
>
> INPUT 110 volt fuse protected
> OUPUT 12 volt DC as 3 amps, circuit breaker protected
>
> the plug is a USA 3 pin type (2 thin plugs at bottom, one round plug at
> top). Am I right in thinking that the round one means the appliance is
> grounded/earthed?
>
> I can't find anything that relates to watts. Do I calculate this by 12
> (volts) * 3 (amps) to give me 36?
>
> Also, if I buy a transformer which is too low (Maplins do one at
> 45watts) will I blow the transformer, the appliance, or both!?
>
> Many thanks
Yes, the round pin is earth ground, it should be connected to the chassis of
your device.
Your output can supply 36 Watts.
You didn't say what the device is. I suspect a power supply for something.
Without any more information I can only guess that your 45 watt adaptor will
be fine.
Regards,
Tom
>
.
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