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48 volts into 240v appliance

R

ray!

Jan 1, 1970
0
I wish to shed some 48 volts DC power
If I just direct it to a standard 240 volt AC fire
what happens?

TIA
ray
 
B

Bill Shymanski

Jan 1, 1970
0
| I wish to shed some 48 volts DC power
| If I just direct it to a standard 240 volt AC fire
| what happens?

Why did you say "fire"? Freudian slip?
The world is a very big place. In the UK they call a portable heater an
"electric fire".
At 48 V DC you 'd only dissipate, hmm, say 4% of the rated dissipation
of the heater at 240V - which might be too little to be worth doing. A
UK plug is fused at 13 A (someone correct me) which is 3120 W, so at 48
V the same resistance element would dissipate about 125 watts. I don't
know about UK electric fires but over here our portable heaters have AC
motors and fans which of course will not run on 48 V DC.

Bill
 
R

ray!

Jan 1, 1970
0
thanks sorry yes I am talking UK here
the sort of electric heater I have in mind uses a long coiled element
rather than a heater with a motor and fan which we call a fan heater over
here

I am not particularly wanting to get a heater that works very well,
I just want a simple way of losing the spare energy,
without having to buy a 48volt appliance

ray


 
ray! said:
thanks sorry yes I am talking UK here
the sort of electric heater I have in mind uses a long coiled element
rather than a heater with a motor and fan which we call a fan heater over
here

I am not particularly wanting to get a heater that works very well,
I just want a simple way of losing the spare energy,
without having to buy a 48volt appliance

ray

You won't hurt the fire, if it is simply the
long coiled element (no fan or electronics
or timer etc.) - but you will hurt the battery,
if that is the source, unless you monitor the
discharge and stop it before taking too much
out. Discharging a battery too deeply can
damage it. If indeed it is a battery you want
to discharge, I would suggest you incorporate
an automatic shut off circuit in the discharge
path.
 
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