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Subject: Re: Higher loads on triac light dimmer ???
User-Agent: slrn/0.9.7.4 (Linux)
Date: 17 Sep 2002 12:05:26 -0600
In article , Kevin McMurtrie wrote:
>In article ,
> "CS" wrote:
>>Hi, I'm moving a coffee machine from the USA 110V to Australia 220V which
>>has a heating element rated at 1300W.
>>Rather than using a bulky & expensive step down transformer, I would prefer
>>to use a standard thyristor light dimmer to control the heating element
>>since it is just a resistive load, but every light dimmer I've seen is
>>limited to about 600W.
>>Is it possible to modify something to get this to work, like add a heatsink
>>to the 600W light dimmer ??
>A dimmer works by chopping up the AC wave. Choping up 220VAC and
>feeding it into your coffee maker's 9.3 Ohm (1300W / 110V) load would
>create terrible line noise. 220VAC peaks at 311V. 311V into 9.3 Ohms
>is 33.4 Amps! It could fry electronics and heat up your house's
>Get a new coffee maker.
I can't believe someone suggested using a light dimmer. Obviously not having
the *slightest* clue isn't enough to keep "CS" from posting his brand of
advice. Perhaps someday "CS" will burn his own house down to the ground and
that'll end his helpfull non-advice.
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